Dufour, F., Davies, J.H.F.L., Greenman, J.W., Skulski, T., Halversn, G.P., Stevenson, R., 2023. New U-Pb CA-ID TIMS zircon ages implicate the Franklin LIP as the proximal trigger for the Sturtian Snowball Earth eventhttps://www.sciencedirect.com/science/article/pii/S0012821X23002728. EPSL 618, 118259.

Greenman, J.W., dos Santos, A.G., Patzke, M., Gibson, T.M., Ielpi, A., Halverson, G.P., 2023. A tectonostratigraphic framework fro the late Mesoproterozoic Bylot basins of Laurentia. in D. Regis and A. Ielpi (Eds.) Journal of the Geological Society, Special Publication: Earth Evolution through a Tectono-Metamorphic Lens: a Record of Tectonic and Biogeochemical Evolution. https://doi.org/10.1144/jgs2022-17.

Maloney, K.M., Maverick, D., Schiffbauer, J.D., Halverson, G.P., Xiao, S., Laflamme, M., 2023. Systematic paleontology of macroalgal fossils from the Tonian Mackenzie Mountain Supergrouphttps://www.cambridge.org/core/journals/journal-of-paleontology/article/systematic-paleontology-of-macroalgal-fossils-from-the-tonian-mackenzie-mountains-supergroup/13CE09C0C52658D72508F35083336186. Journal of Paleontology. https://doi.org/10.1144/jgs2022-17.

Zhang, T., Keller, C.B., Hoggard, M.J., Rooney, A.D., Halverson, G.P., Bergmann, K.D., Crowley, J. L., Strauss, J.V., 2023. A Bayesian framework for subsidence modeling in sedimentary basins: A case study of the Tonian Akademikerbreen Group of Svalbard, Norway. EPSL 620, 118317.



Wang, C., Lechte, M., Reinhard, C., Asael, D., Cole, D., Halverson, G., Porter, S., Galili, N., Halevy, I., Rainbird, R., Lyons, T., Planavsky, N., 2022. Strong evidence for a weakly oxygenated ocean-atmosphere during the Proterozoic. Proceedings of the National Academy of Sciences, 119, e2116101119. https://doi.org/10.1073/pnas.2116101119

Chen, S., Schmitz, M., Johnson, P., Davies, J.H.F.L., Halverson, G.P., 2022. U-Pb geochronology and cyclostratigraphy of the middle Ediacaran upper Jibalah Group, eastern Arabian Shield. Precambrian Research, 375, 106674. https://doi.org/10.1016/j.precamres.2022.106674

Dang, D,H., Wang, W., Gibson, T.M., Kunzmann, M., Andersen, M., Halverson, G.P., Evans, R.D., 2022. Variations in authigenic uranium isotopes in late Proterozoic black shales. Chemical Geology, 588, 120644. https://doi.org/10.1016/ j.chemgeo.2021.120644

Halverson, G.P., Shen, C., Davies, J.H.D.L., *Wu, L., 2022. A Bayesian approach to inferring depositional ages applied to a late Tonian reference section in Svalbard. Frontiers in Earth Sciences, 10:798739. https://doi.org/10.3389/feart.2022.798739

Kunzmann, M., Crombez, V., Blaikie, T.N., Catuneanu, O., King, R., Halverson, G.P., Schmid, S., Spinks, S.S., 2022. Sequence stratigraphy of the ca. 1640 Ma Barney Creek Formation, McArthur Basin, Australia. Australian Journal of Earth Sciences. https://doi.org/10.1080/08120099.2022.2095030

Maloney, K.M., Schiffbauer, J.D., Halverson, G.P., Xiao, S., Laflamme, M., 2022. Preservation of early Tonian macroalgae from the Dolores Creek Formation, Yukon. Scientific Reports, 12, 1–13. https://doi.org/10.1038/s41598-022-10223-x

Millikin, A.E.G., Strauss, J.V., Halverson, G.P., Bergmann, K.D., Tosca, N.J., Rooney, A.D., 2022. Calibrating the Russøya excursion in Svalbard, Norway, and implications for Neoproterozoic chronology. Geology, 50, 506–510. https://doi.org/10.1130/G49593.1

Shields, G., Strachan, R.A., Porter, S.M., Halverson, G.P., and 32 others, 2022. A template for an improved rock-based subdivision of the pre-Cryogenian time scale. Journal of the Geological Society, 179, jgs2020-222. https://doi.org/10.1144/jgs2020-222

Wu, L., Huang W., Liang, H., Murphy, J.B., Kirscher, U., Mitchell, R.N., Hawkins, L.M.A., Halverson, G.P., Gu, Y.J., Zhang, J., Liu, X., 2022. Paleomagnetism of the Guanyang Devonian sedimentary successions in Guangxi province, South China. Gondwana Research, 105, 143–155. https://doi.org/10.1016/j.gr.2021.09.004

Wu, L., Murphy, J.B., Collins, W.J., Waldron, J.W.F., Li, Z.-X., Pisarevsky, S.A., Halverson, G.P., 2022. A trans-Iapetus transform fault control for the evolution of the Rheic Ocean: Implications for an early Paleozoic transition of accretionary tectonics. Geological Society of America Bulletin, 134, 2790–2808. https://doi.org/10.1130/B36158.1


Chen, C.X., Tissot, F.L.H., Jansen, M., Bekker, A., Liu, C.X., Nie, N. X., Halverson, G.P., Veizer, J., Dauphas, N., 2021. U isotope record of shales and carbonates through geological time. Geochemical et Cosmochimica Acta, 300, 164–191. doi:10.1016/j.gca.2021.01.040

Crockford, P.W., Kunzmann, M., Blättler, C., Kalderon-Asael, B., Ahm, A. S. C., Murphy, J.G., Halverson, G.P., Planavsky, N.J., Halevy, I., Higgins, J.A., 2021. Reconstructing Neoproterozoic seawater chemistry from early diagenetic dolomite. Geology, 49, 442–446. doi: 10.1130/G48213.1

Farrell, U.C. and members of the Sedimentary Geochemistry and Paleoenvironments Project (SGP), 2021. The Sedimentary Geochemistry and Paleoenvironments Project. Geobiology, 19, 545–556. https://doi.org/10.1111/gbi.12462

Greenman, J.W., Rooney, A., *Patzke, M., Ielpi, A., Halverson, G.P., 2021. Re-Os geochronology highlights widespread latest Mesoproterozoic (ca. 1090-1050 Ma) cratonic basin development on northern Laurentia. Geology, 49, doi:10.1130/G48521.1.

Hall, P.A., McKirdy, D.A., Halverson, G.P., Jago, J.B., Collins, A.S., 2021. Biogeochemical status of the Palaeo-Pacific Ocean: clues from the early Cam- brian of South Australia. Australian Journal of Earth Sciences, 68, 968–991. https://doi.org/10.1080/08120099.2021.1890639

Hoffman, P.F., Halverson, G.P., Schrag, D.P., Higgins, J.A., Domack, E.W., Macdonald, F.A., Pruss, S.B., Blattler, C.L., Crockford, P.W., Hodgin, B.E., Belle- froid, E.J., Johnson, B.W., Hodgskiss, M.S.W., Lamothe, K.G., LoBianco, S.J.C., Busch, J.F., Howes, B.J., Greenman, J.W., Nelson, L.L., 2021. Snowballs in Africa: sectioning a long-lived Neoproterozoic carbonate platform and its bathyal foreslope (NW Namibia). Earth-Science Reviews, 219, 103616.

Loron C.C., Halverson G.P., Rainbird R.H., Skulski T., Turner E. C., and Javaux E.J., 2021. Shale-hosted biota from the Dismal Lakes Group in Arctic Canada supports an early Mesoproterozoic diversification of eukaryotes. Journal of Paleontology, 95, 113–137. https://doi.org/10.1017/jpa.2021.45

Maloney, K.M., Halverson, G.P., Xiao, S., Gibson, T.M., Lechte, M.A., Milikin, A.E.G., Murphy, J.G., Wallace, M.W., Schiffbauer, J.D., Laflamme, M., 2021. Large, multicellular macroalgae in ca. 950 Ma Tonian marine environments. Geology, v. 49, doi:10.1130/G48508.1.  

Patzke, M., Greenman, J.W., Halverson, G.P., Ielpi, A., 2021. The initiation of the Mesoproterozoic Bylot basins (Nunavut, Arctic Canada) as recorded in the Nyeboe Formation, Fury and Hecla Group. Journal of Sedimentary Research, 91, 1166–1187.

Woltz, C.R., Porter, S., Agic, H., Dehler, C.M., Junium, C.K., Riedman, L.A., Hodgskiss, M.S.W., Wörndle, S., Halverson, G.P., 2021. Total organic carbon and the preservation of organic-walled microfossils in Precambrian shale. Geology, 49, 556–560. https://doi.org/10.1130/G48116.1.


Gibson, T.M., Kunzmann, M., Poirier, A., Schumann, D., Tosca, N.J., and Halverson, G.P., 2020. Geochemical signatures of transgressive shale intervals from the 811 Ma Fifteenmile Group in Yukon, Canada: Disentangling sedimentary redox cycling from weathering alteration. Geochimica et Cosmochimica Acta, 280, 161–184.

Hodgskiss, M.S.W., Lamothe, K.G., Halverson, G., Sperling, E.A., 2020. Extending the record of the Lomagundi-Jatuli carbon isotope excursion in the Labrador Trough, Canada. Canadian Journal of Earth Sciences, 57, 1089–1102.

Hodgskiss, M.S.W., Sansjofre, P., Kunzmann, M., Sperling, E.A., Cole, D.B., Crockford, P.W., Gibson, T.M., Halverson, G.P., 2020. A high-TOC shale in a low productivity world: the late Mesoproterozoic Arctic Bay Formation, Nunavut. Earth and Planetary Science Letters, 584, 116384.


Bellefroid, E.J., Planavsky, N.J., Hood, A. v.S., Halverson, G.P., and Spokas, K., 2019. Shallow water redox conditions of the Mid-Proterozoic Muskwa Assemblage, British Columbia, Canada. American Journal of Science, 319, 122–157.

Crockford, P.W., Kunzmann, M., Bekker, A., Hayles, J., Bao, H., Halverson, G.P., Peng, Y., Bui, T.H., Cox, G., Gibson, T., Wörndle, S., Rainbird, R., Lepland, A., Swanson-Hysell, N.L., Master, S., Sreenivas, B., Kuznetsov, A., and Wing, B.A., 2019. Claypool continued: extending the isotopic record of marine sulfate. Chemical Geology, 513, 200-225.

Crockford, P.W., Wing, B.A., Paytan, A., Bitterwolf, K.K., Hayles, J.A., Mid- dleton, J., Ahm, A.-S., Johnston, D.T., Caxito, F., Uhlein, G., Halverson, G.P., Eickman, B., Horner, T.J., 2019. Barium-isotopic constraints on the origin of post-Marinoan barites. Earth and Planetary Science Letters, 519, 234–244.

Gibson, T.M., Wörndle, S., Crockford, P.W., Bui, T.H., Creaser, R., and Halverson, G.P., in press. Radiogenic isotope chemostratigraphy reveals marine and non-marine depositional environments in the late Mesoproterozoic Borden Basin, Arctic Canada. Geological Society of America Bulletin 131, 1965–1978.

Hodgskiss, M., Dagnaud, O., Frost, J., Halverson, G., Schmitz, M., Swanson-Hysell, N., Sperling, E. 2019. New insights on the Orosirian carbon cycle, early Cyanobacteria, and the assembly of Laurentia. Earth and Planetary Science Letters, 520, 144–152.

Kunzmann, M., Blaikie, T., Halverson, G.P., and Schmid, S., 2019. Facies analysis, sequence stratigraphy, and carbon isotope chemostratigraphy of the Proterozoic middle McArthur Group, McArthur Basin, Australia: Implications for sediment-hosted stratiform Zn-Pb-Ag exploration. Ore Geology Reviews, 106, 150–175.

Lamothe, K.G., Hoffman, P.F., Halverson, G.P., 2019. Stratigraphy and isotope geochemistry fo the pre-Sturtian Ugab Subgroup, Otavi Group, northwestern Namibia. Precambrian Research 332, 10.1016/j.precamres.2019.105387.

Lechte, M.A., Wallace, M.W., Hood, A. v. S., Li W., Jiang, G., Halverson, G.P., Asael, D., McColl, S.L., and Planavsky, N.J., 2019. Subglacial meltwater supported aerobic marine habitats during Snowball Earth. PNAS.



Cox, G.M., Halverson, G.P., Denyszyn, S., Foden, J., Macdonald, F.A., 2018. Cryogenian magmatism along the north-western margin of Laurential: Plume or rift? Precambrian Research, 319, 144-157.

Crockford, P.W., Hodgskiss, M.S.W., Uhlein, G.J., Caxito, F., Hayles, J.A., and Halverson, G.P., 2018. Linking paleocontinents through D17O anomalies. Geology, 46, 179–182.

Crockford, P.W., Hayles, J., Bao, H., Planavasky, N.J., Bekker, A., Fralick, P.W., Halver- son, G.P., Bui, T.H., Wing, B.A., Yongo Peng, 2018. Limited primary production sus- tained low mid-Proterozoic oxygen levels. Nature. DOI: 10.1038/s41586-018-0349-y.

Gibson, T.M., Shih, P.M., Cumming, V.M., Fischer, W.W., Crockford, P.W., Hodgskiss, M.S.W., Wörndle, S., Creaser, R.A., Rainbird, R.H., Skulski, T.M., and Halverson, G.P., 2018. Precise age of Bangiomorpha pubescens dates the emergence of eukaryotic photosynthesis. Geology, 46, 135–139.

Halverson, G.P., Porter, S.M., and Gibson, T.M., 2018. Dating the Late Proterozoic strati- graphic record. Emerging Topics in the Life Sciences, 2, 137–147.

Halverson, G.P., Kunzmann, M., Strauss, J.V.,and Maloof, A.C., 2018. The Tonian-Cryogenian transition in Svalbard. Precambrian Research, 319, 79–95.

Hodgskiss, M.S.W, Kunzmann, M., Poirier, A., and Halverson, G.P., 2018. The role of microbial iron reduction in the formation of Proterozoic molar tooth structures. Earth and Planetary Science Letters, 482, 1–11.

Hoffman, P.F., Halverson, G.P., 2018. Discussion of “Depositional ages and provenance of the Neoproterozoic Damara Supergroup (northwest Namibia): Implications for the Angola-Congo and Kalahari cratons connection” by Debora B. Nascimento, Renata S. Schmitt, Andre Ribeiro, Rudolph A. J. Trouw, Cees W. Passcier, and Miguel A. S. Basei. Gondwana Research, 58, 235–238.

Lu, W., Wörndle, S., Halverson, G.P., Zhou, X., Bekker, A., Rainbird, R.H., Hardisty, D.S., Lyons, T.W., and Lu, Z., 2018. Iodine, oxygen and carbon perturbations during the Bitter Springs Anomaly. Geochemical Perspectives Letters, 5, 53–57.

Macdonald, F.A., Schimtz, M.D., Strauss, J.V., Halverson, G.P., Gibson, T.M., Eyster, A., Cox, G., Mamrol, P., Crowley, J.L., 2018. The Cryogenian of Yukon. Precambrian Research, 319, 114–143.

Shields, G.A., Halverson, G.P., Porter, S.M., 2018. Descent into the Cryogenian. Precambrian Research, 319, 1–5.



Barr, C., Tibby, J., Moss, P., Halverson, G., Marshall, J., McGregor, G., Sterling, E., 2017. A 25,000 year record of environmental change from Welsby Lagoon, North Stradbroke Island in the Australian subtropics. Quaternary International, 449, 106-118.

Elsworth, G., Galbraith, E., Halverson, G.P., Yang, S., 2017. Enhanced weathering and CO2 drawdown caused by latest Eocene strengthening of the Atlantic Meridional Overturning Circulation, Nature Geoscience. DOI:10.1038/NGEO2888.

Eyster, A.E., Fu, R.R., Strauss, J.V., Weiss, B.P., Roots, C.F., Halverson, G.P., Evans, D.A.D., Macdonald, F.A. 2016. Paleomagnetic evidence for a 50º rotation of the Yukon Block relative to Laurentia: Implications for a low-latitude Sturtian Glaciation and the break-up of Rodinia. Geological Society of America Bulletin, 129, 38–58.

Gibson, T.M., Shih, P.M., Cumming, V.M., Fischer, W.W., Crockford, P.W., *Hodgskiss, M.S.W., *Wörndle, S., Creaser, R.A., Rainbird, R.H., Skulski, T.M., and Halverson, G.P., in revision. Precise age of Bangiomorpha pubescens dates the emergence of eukaryotic photosynthesis. Geology, DOI:10.1130/G39829.1.

Goddéris, Y., Le Hir, G., Macouin, M., Donnadieu, Y., Hubert-Théou, L., Dera, G., Aretz, M., Fluteau, F., Li, Z.-X., Halverson, G.P., 2017. Paleogeographic forcing of the stro tium isotopic cycle in the Neoproterozoic. Gondwana Research, 42, 151–162.

Halverson, G.P., 2017. Introducing the Xenoconformity (Research Focus). Geology, 45, 671-672.

Hodgskiss, M.S.W, Kunzmann, M., Poirier, A., Halverson, G.P., 2018. The role of microbial iron reduction in the formation of Proterozoic molar tooth structures. Earth and Planetary Science Letters, 482, 1–11.

Hoffman, P.F., Abbott, D.S., Ashkenay, Y., Benn, D. I., Brocks, J.J., Cohen, P.A., Cox, G.M., Creveling, J.R., Donnadieu, Y., Erwin, D.H., Fairchild, I.J., Ferreira, D., Goodman, J.C., Halverson, G.P., Jansen, M.F., Le Hir, G., Love, G.D., Macdonald, F.A., Maloof, A.C., Partin, C.A., Ramstein, G., Rose, B.E.J., Rose, C.V., Sadler, P.M., Tziperman, E., Voigt, A., and Warren, S.G., 2017. Snowball Earth climate dynamics and Cryogenian geology and geobiology. Science Advances, 3, e1600983.

Horner, T.J., Pryer, H.V., Nielsen, S.G., Crockford, P.W., Gauglitz, J.M., Wing, B.A., Ricketts, R.D., 2017. Pelagic barite precipitation at micromolar ambient sulfate. Nature Communications, 8, 1342.

Kunzmann, M., Bui, T.H. Crockford, P.W, Halverson, G.P., Scott, C., Lyons, T.W., and Wing, B.A.. 2017. Bacterial sulfur disproportionation constrains timing of Neoproterozoic oxygenation. Geology, 45, 207–210.

Kunzmann, M., Gibson, T.M., Halverson, G.P., Hodgskiss, M.S.W., Bui, T.H., Carozza, D.A., Sperling, E.A., Poirier, A., *Cox, G.M., and Wing, B.A., 2017. Iron isotope biogeochemistry of Neoproterozoic marine shales. Geochimica et Cosmochimica Acta, 209, 85-105.

Mendes, M., Lobato, L., Halverson, G.P., Kunzmann, M., Rosière, C.A., Figueiredo e Silval, R., 2017. Iron isotope and REE+Y composition of the Paleoproterozoic banded iron formations and their related iron ores from the Quadrilátero Ferrífero, Brazil: Implications for their genesis. Mineralium Deposita, 52, 159–180.

Miller, A.J., Strauss, J.V., Halverson, G.P., Macdonald, F.A., Johnston, D.T., and Sperling, E.A., 2017. Tracking the onset of Phanerozoic-style redox-sensitive trace metal en- richments: New data from basal Ediacaran post-glacial strata in NW Canada. Chemical Geology, 457, 24-37.

Uhlein, G., Uhlein, A., Stevenson, R., Halverson, G.P., Caxito, F., and Cox, G., 2017. Early to late Ediacaran conglomeratic wedges from a complete foreland basin cycle on the southwestern São Francisco craton, Bambuí? Group, Brazil. Precambrian Research, 299, 101-116.



Ader, M., Thomazo, C., Sansjofre, P., Busigny, V., Papineau, D., Laffon, R., Cartigny, P., and Halverson, G.P., 2016. Nitrogen isotope interpretation in Precambrian sedimentary rocks: assumptions and perspectives. Chemical Geology, 429, 93–110.

Angerer, T., Hagemann, S.G., Walde, D., Halverson, G.P., and Boyce, A.J., 2016. Multiple metal sources in the glaciomarine facies of the Neoproterozoic Jacadigo iron formation in the Santa Cruz Deposit, Corumbá, Brazil. Precambrian Geology, 275, 369–393.

Colangelo-Lillis, J., Wing, B.A., and Whyte, L.G., 2016. Low viral predation pressure in cold hypersaline Arctic sediments and limits on lytic replication. Environmental Microbiology Reports. 0.1111/1758-2229.12375.

Cole, D.B., Reinhard, C.T., Wang, X., Gueguen, B., Halverson, G.P., Lyons, T.W., Planavsky, N.J., 2016. A shale-hosted Cr isotope record of low atmospheric oxygen during the Proterozoic. Geology, 44, 555–558.

Cox, G.M., Halverson, G.P., Poirier, A., Le Heron, D., Strauss, J.V., and Stevenson, R.S. 2016. A model for Cryogenian iron formation. Earth and Planetary Science Letters, 433, 280–292.

Cox, G.M., Halverson, G.P., Stevenson, R.S., Vokaty, M., Poirier, A., Kunzmann, M., Li, Z-X., Denyszyn, S., Strauss, J.V., and Macdonald, F.A., 2016. A continental flood basalt weathering trigger for snowball Earth. Earth and Planetary Science Letters, 446, 89–99.

Cox, G.M., Jarrett, A., Edwards, D., Crockford, P., Halverson, G.P., Li, Z.-L., Collins, A.S., 2016. The Mesoproterozoic Roper Seaway. Chemical Geology, 440, 101–114.

Crockford, P.W., Cowie, B.R., Johnston, D.T., Hayles, J., Halverson, G.P., Sugiyama, I., Pellerin, A., Bui, T.-H., Hoffman, P.F., Macdonald, F.A., and Wing, B.A., 2016. Triple oxygen isotope constraints on the evolution of the earliest Ediacaran marine sulfur cycle. Earth and Planetary Science Letters, 435. 74-83.

Fairchild, I.J., Fleming, E.J., Bao, H., Benn, D.I., Boomer, I., Dublyansky, Y.V., Halverson, G.P., Hambrey, M.J., Hendy, C., McMillan, E.A., Sp¨otl, C., Stevenson, C.T.E., and Wynn, P.M., accepted. Continental carbonate facies of a Neoproterozoic panglaciation, NE Svalbard. Sedimentology, 63, 443–497.

Fairchild, I.J., Bonnand, P., Condon, D., Davies, T., Fleming, E.J., Grassineau, N., Halver-
son, G.P., Hambrey, M.J., McMillan, E.M., McKay, E., Parkinson, I.J., and Stevenson, C.T.E., 2016. Rhythmic dolomitic shales between Cryogenian glacials, NE Svalbard: chemostratigraphy and genesis. Precambrian Research, 281, 128–154.

Goddéris, Y., Le Hir, G., Macouin, M., Donnadieu, Y., Hubert-Théou, L., Dera, G., Aretz, M., Fluteau, F., Li, Z.-X., Halverson, G.P., in press. Paleogeographic forcing of the strontium isotopic cycle in the Neoproterozoic. Gondwana Research, doi:10.1016/j.gr.2016.09.013.

Hiebert, R.S., Bekker, A., Houlé, M.G., Wing, B.A., Rouxel, O.J., 2016. Tracing sources of crustal contamination using multiple S and Fe isotopes in the Hart komatiite-associated Ni-Cu-PGE sulfide deposit, Abitibi greenstone belt, Ontario, Canada. Mineralium Deposita, doi:10.007/s00126-016-0644-1.

Hoffman, P.F., Bellefroid, E., Johnson, B.W., Hodgskiss, M.W., Schrag, D.P., and Halver- son, G.P., in press. Early extensional detachments in a contractional orogen: coherent, map-scale, submarine slides (mass transport complexes) on the outer slope of an Edi- acaran collisional foredeep, eastern Kaoko belt, Namibia. Canadian Journal of Earth Sciences. doi:10.1139/cjes-2015-0164.

Konnunaho, J., Hanski, E., Wing, B., Bekker, A., Lukkari, S., Halkoaho, T., 2016. The Hietaharju PGE-enriched komatiite-hosted sulfide deposit in the Archean Suomussalmi greenstone belt, eastern Finland. Ore Geology Reviews, 72, 641–658.

Masterson, A.L., Wing, B.A., Paytan, A., Farquhar, J., and Johnston, D.T., 2016. The minor sulfur isotope composition of Cretaceous and Cenozoic seawater sulfate. Paleocoeangraphy, doi:10.1002/2016PA002945.

Shields-Zhou, G.A., Porter, S.M., and Halverson, G.P., 2016. A new rock-based definition for the Cryogenian Period (circa 720–635 Ma). Episodes 39, 3–8.


Uhlein, G.J., Uhlein, A., Halverson, G.P., Stevenson, R., Caxito, F., Cox, G.M., Carvalho, F.M.G., 2016. The Carrancas Formation, Bambu´? Group: A Pre-Marinoan Record on the Southern Margin of the Sa˜o Francisco craton. Journal of South American Earth Sciences, 71, 1–16.


Bekker, A., Grokhovskaya, T.L., Hiebert, R., Sharkov, E.V., Bui, T.H., Stadnek, K.R.,Chashchin, V.V., Wing, B.A., 2015. Multiple sulfur isotope and mineralogical constraints on the genesis of Ni-Cu-PGE magmatic sulfide mineralization of the Monchegorsk Igneous Complex, Kola Peninsula, Russia. Mineralium Deposita, 1-19.

Collins, A.C., Patranabis-Deb, S., Alexander, E., Bertram, C.N., Falster, G.M., Gore, R.J., Mackintosh, J., Dhang, P.C., Payne, J.L., Jourdan, F., Back´e, G., Halverson, G.P., and Wade, B.P., 2015. Detrital mineral age, radiogenic isotope stratigraphy, and tectonic significance of the Cuddapah Basin, India. Gondwana Research, 28, 1294-1309.

Cox, G.M., Strauss, J.V., Halverson, G.P., Schmitz, M.D., McClelland, W.C., Stevenson, R.S., and Macdonald, F.A., 2015. Kikiktat Volcanics of Arctic Alaska—Melting of harzburgitic sub-continental lithospheric mantle associated with the Franklin Large Igneous Province. Lithosphere, 7, 275–295.

Hayes, J., Bédard, J.H., Hryciuk, M., Wing, B., Nabelek, P., MacDonald, W.D., and Lissenberg, C.J., alumni2015. Sulfide Immiscibility Induced by Wall-Rock Assimilation in a Fault-Guided Basaltic Feeder System, Franklin Large Igneous Province, Victoria Island (Arctic Canada). Economic Geology, 110, 1697–1717.

Kunzmann, M., Halverson, G.P., Scott, C., Minarik, W.G., and Wing, B.A., 2015. Geo- chemistry of Neoproterozoic black shales from Svalbard: Implications for oceanic redox conditions spanning Cryogenian glaciations. Chemical Geology, 417, 383–393.

Lee, C., Love, G.D., Fischer, W.W., Grotzinger, J.P., and Halverson, G.P., 2015. Organic matter cycling during the Ediacaran Shuram excursion. Geology, 43, 1103–1106.

Pellerin, A., Anderson-Trocme, L, Whyte, L.G., Zane, G.M., Wall, J.D., Wing, B.A. Sulfur isotope fractionation during the evolutionary adaptation of a sulfate reducing bacterium. Applied Environmental Microbiology, 03476-14.

Pellerin, T., Bui, T.H., Rough, M., Mucci, A., Canfield, D.E., Wing, B.A., 2015. Mass-dependent sulfur isotope fractionation during reoxidative sulfur cycling: A case study from Mangrove Lake, Bermuda. GCA 149, 152–164.

Sperling, E.A., Wolock, C., Morgan, A.S., Gill, B.C., Kunzmann, M., Halverson, G.P., Macdonald, F.A., Knoll, A.H., Johnston, D.T., 2015. Statistical evaluation of iron geochemical data from Proterozoic through Paleozoic basins. Nature, 523, 451–454.

Sossi, P.A., Halverson, G.P., Nebel, O., and Eggins, S.M., 2015. Combined separation of Cu, Fe and Zn from rock matrices and improved analytical protocols for stable isotope analysis. Geostandards and Geoanalytical Research, 39, 129–149.

Strauss, J.V., Macdonald, F.A., Halverson, G.P., Schrag, D.P., Knoll, A.H., 2015. Strati- graphic evolution of the Neoproterozoic Callison Lake Formation: Linking the Break-up of Rodinia to the Islay Carbon Isotope Excursion. American Journal of Science, 315, 891–944.

Thomassot, E., O'Neill, J., Francis, D., Cartigny, P., Wing, B.A, 2015.. Atmospheric record in the Hadean Eon from multiple sulfur isotope measurements in Nuvvuagittuq Greenstone Belt (Nunavik, Quebec). PNAS 112, 707–712

Wing, B.A., Farquhar, J., 2015. Sulfur isotope homogeneity of lunar mare basalts. Geocehmica et Cosmochimica Acta, 170, 266–288.



Ader, M., Sansjofre, P., Halverson, G.P., Trindade, R.I.F., Kunzmann, M., and Nogueira, A.C.R., 2014. Ocean redox structure across the Late Neoproterozoic Oxygenation Event: A nitrogen isotope perspective. Earth and Planetary Science Letters, 396, 1– 13.

Halverson, G.P., 2014. Marine isotope stratigraphy. In: W.J. Rink, J.W. Thompson, A.J.T. Jull, J.B. Paces, and L. Heaman (Eds.) Encyclopedia of Scientific Dating Methods. Springer. DOI: 10.10007/978-94-007-6326-5 301-1.

Halverson, G.P. and Théou-Hubert, L., 2014. Seawater Sr curve. In: W.J. Rink, J.W. Thompson, A.J.T. Jull, J.B. Paces, and L. Heaman (Eds.) Encyclopedia of Scientific Dating Methods. Springer. DOI: 10.10007/978-94-007-6326-5 143-1.

Helt, K. M., Williams-Jones, A. E., Clark, J. R., Wing, B. A., and Wares, R. P., 2014. Constraints on the Genesis of the Archean Oxidized, Intrusion-Related Canadian Malartic Gold Deposit, Quebec, Canada. Economic Geology, 109, 713-735.

Kunzmann, M., Gutzmer, J., Beukes, N.J., and Halverson, G.P., in press. Lithofacies of the Palaeoproterozoic Mooidraai Formation (South Africa) and implications for the tectonic setting of the world’s largest manganese deposit. South African Journal of Geology, 117, 173–192.

Kunzmann, M., Halverson, G.P., Macdonald, F.A., Hodgskiss, M., Sansjofre, P.D., Schu- mann, D., and Rainbird, R.H., 2014. The early Neoproterozoic Chandindu Formation of the Fifteenmile Group in the Ogilvie Mountains. In: K.E. MacFarlane, M.G. Nordling, and P.J. Sack (Eds.) Yukon Exploration and Geology 2013. Whitehorse, YT (Yukon Geological Survey), 93–107.

Li, W. Y., Teng, F. Z., Wing, B. A., and Xiao, Y., 2014. Limited magnesium isotope fractionation during metamorphic dehydration in metapelites from the Onawa contact aureole, Maine. Geochemistry, Geophysics, Geosystems.

Nettle, D., Halverson, G.P., Cox, G.M., Collins, A.S., Schmitz, M., Gehling, J., Johnson, P.R, and Kadi, K., 2014. A middle–late Ediacaran volcano-sedimentary record from the eastern Arabian-Nubian Shield. Terra Nova, 26, 120–129.

Rebesco, M., Domack, E., Zgur, F., Lavoie, F., Leventer, A., Brachfeld, S., Willmott, V, Halverson, G., Truffer, M., Scambos, T., and Smith, J., 2014. Boundary condition of grounding lines prior to collapse, Larsen-B Ice Shelf, Antarctica. Science, 345, 1354–1358.

Riedman, L.A., Porter, S.M, Halverson, G.P., Hurtgen, M.T., Junium, C., 2014. Organic- walled microfossil assemblages from glacial and interglacial Neoproterozoic units of Australia and Svalbard. Geology, 42, 1011–1014.

Scott, C., Wing, B. A., Bekker, A., Planavsky, N.J., Medvedev, P., Bates, S.M., Yun, M., and Lyons, T. W., 2014. Pyrite multiple-sulfur isotope evidence for rapid expansion and contraction of the early Paleoproterozoic seawater sulfate reservoir. Earth and Planetary Science Letters, 389, 95-104.

Sossi, P.A., Halverson, G.P., Nebel, O., and Eggins, S.M., 2014. Combined separa- tion of Cu, Fe and Zn from rock matrices and improved analytical protocols for stable isotope analysis. Geostandards and Geoanalytical Research. DOI: 10.1111/j.1751- 908X.2014.00298.x

Wing, B.A., Halevy, I. 2015. Intracellular metabolite levels shape sulfur isotope fractionation during microbial sulfate respiration. GCA 111, 18116–18125.


Cox, G. M., Halverson, G. P., Minarik, W. G., Heron, D. P. L., Macdonald, F. A., Bellefroid, E. J., Strauss, J. V., 2013. Neoproterozoic iron formation: An evaluation of its temporal, environmental and tectonic significance. Chemical Geology, 362, 232–249.

Franz, H. B., Danielache, S. O., Farquhar, J., Wing, B. A., 2013. Mass-independent fractionation of sulfur isotopes during broadband SO2 photolysis: Comparison between 16O-rich and 18O-rich SO2. Chemical Geoloy, 362, 56–65.

Jamieson, J.W., Wing, B.A., Farquhar, J., Hannington, M.D., 2013. Neoarchaean seawater sulphate concentrations for sulphur isotopes in massive sulphide ore. Nature Geoscience, 6, 61–64.

Johnson, P.R., Halverson, G.P., Kusky, T., Stern, R.J., Pease, V., in press. Volcano-sedimentary basins in the Arabian-Nubian Shield: markers of repeated exhumation and denudation in a Neoproterozoic accretionary orogeny. Geosciences, 3, 389–445.

Johnston, D.T., Poulton, S.W., Tosca, N.J., O'Brien, T., Halverson, G.P., Schrag, D.P., Macdonald, F.M., 2013. Search for an oxygeation event in the fossiliferous Ediacaran of northwestern Canada. Chemical Geology, 362, 273–286.

Kunzmann, M., Halverson, G.P., Sossi, P.A., Raub, T.D., Payne, J.L., Kirby, J., 2013. Zinc isotope evidence for the resumption of bioproductivity after snowball Earth. Geology, 41, 27–30.

Li, Z-F., Evans, D.A.D, and Halverson, G.P., 2013. Neoproterozoic glaciations in a revised global paleogeography from the breakup of Rodinia to the assembly of Gondwanaland. Sedimentary Geology, 294, 219–232.

Macdonald, F.M., Strauss, J.V., Sperling, E., Halverson, G.P., Petasch, T., Narbonne, G., Johnston, D.T, Kunzmann, M., Schrag, D.P., and Higgins, J.A., 2013. The stratigraphic relationship between the Shuram carbon isotope excursion, the oxygenation of Neoproterozoic oceans, and the first appearance of the Ediacara biota and bilaterian trace fossils in northwestern Canada. Chemical Geology, 362, 250–272.

Nettle, D., Halverson, G.P., Cox, G.M., Collins, A.S., Schmitz, M., Gehling, J., Johnson, P.R., and Kadi, K., 2013. A middle–late Ediacaran volcano-sedimentary record from the eastern Arabian-Nubian shield. Terra Nova, doi: 10.1111/ter.12077

Payne, J.L., Pearson, N.J., Grant, K.G., Halverson, G.P., 2013. Reassessment of relative oxide formation rates and molecular interferences on in-situ Lutetium-Hafnium analyses with laser ablation MC-ICP-MS. Journal of Analytical Atomic Spectrometry, 28, 1068–1079.

Scott, C....Wing, B.A., et al., 2013. Bioavailability of Zn through time. Nature Geoscience, 6, 125–128.

Sperling, E., Halverson, G.P., Knoll, A.H., Macdonald, F.A, and Johnston, D.T., 2013. A basin redox transect at the dawn of animal life. Earth and Planetary Sciences.  371–372, 143–155.

Wing, B. A., 2013. A cold, hard look at ancient oxygen. PNAS 110, 14514–14515.


Caxito, F., Halverson, G.P., Uhlein, A., Stevenson, R., Gonçalves-Días, T., and Uhlein, G.J., 2012. Marinoan glaciation in central-eastern Brazil. Precambrian Research, 200–203, 38–58.

Cox, G.M., Lewis, C., Collins, A.S., Nettle, D., Halverson, G.P., Foden, J., Kattan, F., and Jourdan, F., 2012. Ediacaran terrane accretion in the Arabian-Nubian shield. Gondwana Research, 21, 342–352.

Gallet, Y., Pavlov, V., Halverson, G.P., and Hulot, G., 2012. Toward constraining the long-term reversing behavior of the geodynamo: A new “Maya” superchron ~1000 Ma ago from the magnetostratigraphy of the Kartochka Formation (southwestern Siberia). Earth and Planetary Science Letters, 339–340, 117–126.

Halverson, G.P., Macdonald, F.M., Strauss, J.V., Smith, E.F., Cox, G.M., and Hubert-Théou, L., 2012. Updated definition and correlation of the lower Fifteenmile Group in the central and eastern Ogilvie Mountains. In: K. McFarland (Ed.) Yukon Exploration and Geology 2011. Whitehorse, YT (Yukon Geological Survey), 75–90.

Hoffman, P.F., Halverson, G.P., Domack, E.W., Swanson-Hysell, N.L., and Maloof, A.C., Cox, G.M., 2012. Cryogenian glaciation in East Greenland and NE Svalbard revisited: Sturtian age for the Petrovbreen-Ulvesø diamictites. Precambrian Research, 206–207, 137–158.

Fiorentini, M.L., Bekker, A., Rouxel, O., Wing, B.A., Maier, W., Rumble, D., 2012. Multiople sulfur and iron isotope composition of magmatic Ni-Cu-(PGE) sulfide mineralization from eastern Botswana. Economic Geology, 107, 105-116.

McGee, B., Halverson, G.P., and Collins, A.S., 2012. Cryogenian rift-related magmatism and sedimentation: south-western Congo craton. Journal of African Earth Sciences, 76, 34–49.

Pennistand-Dorland, S.C., Mathez, E.A., Wing, B.A., Farquhar, J., and Kinnaird, J.A., 2012. Multiple sulfur isotope evidence for surface-derived sulfur in the Buschveld Complex. Earth and Planetary Science Letters, 337–338, 236–242.

Sossi, P., Foden, J., and Halverson, G.P., 2012. Redox-controlled iron isotope fractionation during magmatic differentiation. Contributions to Mineralogy and Petrology. DOI 10.1007/s00410-012-0769-x.

Wing, B.A., 2012. Archaean biogeochemistry: unexpectedly abiotic. Nature Geoscience, 5, 598-599.


Arnaud, E., Halverson, G.P. & Shields-Zhou, G.A. (Eds.), 2011. The Geological Record of Neoproterozoic Glaciations.  Geological Society of London, Memoir, 36. London.

Halverson, G.P., Poitrasson, F., Hoffman, P.F., Nédélec, A., Montel, J.-M., Kirby, J., 2011. Fe isotope and trace element geochemistry of the Neoproterozoic syn-glacial Rapitan iron formation. Earth and Planetary Sciences, 309, 100–112.

Halverson, G.P. and Shields-Zhou, G., 2011. Chemostratigraphy and the Neoproterozoic glaciations. In: Arnaud, E., Halverson, G. P. & Shields-Zhou, G.A. (Eds.) The Geological Record of Neoproterozoic Glaciations.  Geological Society of London, Memoir, 36, 51–66.

Halverson, G.P., 2011. Glacial sediments and associated strata of the Polarisbreen Group, northeastern Svalbard. In: Arnaud, E., Halverson, G. P. & Shields-Zhou, G.A. (Eds.) The Geological Record of Neoproterozoic glaciation.  The Geological Record of Neoproterozoic Glaciations.  Geological Society of London, Memoir, 36, 571–579.

Hoffman, P.F., and Halverson, G.P., 2011. Neoproterozoic glacial record in the Mackenzie Mountains, northwest Canadian Cordillera. In: Arnaud, E., Halverson, G. P. & Shields-Zhou, G.A. (Eds.) The Geological Record of Neoproterozoic Glaciations.  Geological Society of London, Memoir, 36, 397–411.

Hoffman, P.F., Macdonald, F.A., and Halverson, G.P., 2011. Chemical sediments associated with Neoproterozoic glaciations: Iron formation, cap carbonates, barite, and phosphorite. In: Arnaud, E., Halverson, G. P. & Shields-Zhou, G.A. (Eds.) The Geological Record of Neoproterozoic Glaciations.  Geological Society of London, Memoir, 36, 67–80.

Le Heron, D.P., Cox, G., Trundley, A., and Collins, A., 2011. Sea ice–free conditions during the Sturtian glaciation (early Cryogenian), South Australia. Geology, 39, 31–34.

Macdonald, F.A., Smith, E.F., Strauss, J.V., Cox, G.M., Halverson, G.P., Roots, C.F., 2011. Neoproterozoic and early Palaeozoic correlations in the western Ogilvie Mountains. In: Yukon Exploration and Geology 2010 (eds K. E. MacFarlane, L. H. Weston and L. R. Blackburn), Whitehorse, YT (Yukon Geological Survey), pp. 161–182.

Masterson, A.L., Farquhar, J., and Wing, B.A, 2011. Sulfur mass-independent fractionation patterns in the broadband UV photolysis of sulfur dioxide: Pressure and third body effects. Earth and Planetary Science Letters, 306, 253-306.

McKirdy, D.M., Hall, P.A., Nedin, C., Halverson, G.P., Jago, J.B., Gehling, J.G., and Jenkins, R.F., 2011. Palaeoredox status and thermal alteration of the lower Cambrian (Series 2) Emu Bay Shale Lagerstätte, South Australia. Australian Journal of Earth Sciences, 58, 359–272.

Planavsky, N.J., McGoldrick, P., Scott, C.T., Li, C., Reinhard, C T., Kelley A E., Chu, X., Bekker, A., Love, G. D., Lyons, T. W., 2011. Widespread iron-rich conditions in the Mid-Proterozoic Ocean. Nature, 477, 448-451.

Scott, C.T., Bekker, A., Reinhard, C.T., Schnetger, B., Krapez, B., Rumble III, Lyons, T.W., 2011. Late Archean euxinic conditions before the rise of atmospheric oxygen. Geology, 39, 119-122.

Shen, Y., Farquhar, J., Zhang, H., Masterson, A., Zhang, T., and Wing, B.A., 2011. Multiple S-isotopic evidence for episodic shoaling of anoxic water during Late Permian mass extinction. Nature Communications, 2, Article 210.


Halverson, G.P., Wade, B.P., Hurtgen, M.T., Barovich, K.M., 2010. Neoproterozoic chemostratigraphy. Precambrian Research, 182, 337–350.

Swanson-Hysell, N.L., Rose, C.V., Calmet, C., Halverson, G.P., Hurtgen, M.T., and Maloof, A.C., 2010. Cryogenian onset of a dynamic carbon cycle. Science, 358, 608–611.


Guo, Q., Strauss, H., Kaufman, A.J., Schröder, S., Gutzmer, J., Wing, B., Baker, M.A., Bekker, A., Jin, Q., Kim, S.-T., and Farquhar, J., (2009). Reconstructing Earth’s surface oxidation across the Archean-Proterozoic transition. Geology, 37(5), 399-402.

Cartigny, P., Farquhar, J., Thomassot, E., Harris, J.W., Wing, B., Masterson, A., McKeegan, K., and Stachel, T.S., (2009). A mantle origin for Paleoarchean peridotitic diamonds from the Panda kimberlite, Slave craton: evidence from 13C-, 15N- and 33, 34S- stable isotope systematics. Lithos, 112(S2), 852–864.

Gaucher, C., Sial, A.N., Halverson, G.P., and Frimmel, H.E. (Eds.), 2009. Neoproterozoic-Cambrian Tectonics, Global Change and Evolution: A Focus on Southwestern Gondwana. Developments in Precambrian Geology, Vol. 16. Elsevier, 466 pp.

Guo, Q., Strauss, H., Kaufman, A.J., Schröder, S., Gutzmer, J., Wing, B., Baker, M.A., Bekker, A., Jin, Q., Kim, S.-T., and Farquhar, J., 2009. Reconstruction Earth's surface oxidation across the Archean-Proterozoic transition. Geology, 37, 399-402.

Halverson, G.P., Hurtgen, M.T., Porter, S.M., and Collins, A.C., 2009. Neoproterozoic-Cambrian biogeochemical evolution. Neoproterozoic-Cambrian Tectonics, Global Change and Evolution: A Focus on Southwestern Gondwana. Developments in Precambrian Geology, Vol. 16 (Elsevier), pp. 351–365.

Hoffman, P.F., Calver, C., and Halverson, G.P., 2009. Cottons Breccia of King Island, Tasmania: glacial or non-glacial, Cryogenian or Ediacaran? Precambrian Research, 172, 311-322.

Le Hir, G., Donnadieu, Y., Goddéris, Y., Pierrehumbert, R.T., Halverson, G.P., Macouin, M, Néedélec, A., and Ramstein, G., 2009. The snowball Earth aftermath: exploring the limits of continental weathering processes. Earth and Planetary Science Letters, 277, 453-463.


Penniston-Dorland, S.C., Wing, B.A., Nex, P.A.M., Kinnaird, J.A., Farquhar, J., Brown M., and Sharman, E.R., (2008). Multiple sulfur isotopes reveal a magmatic origin for the Platreef platinum group element deposit, Bushveld Complex, South Africa. Geology, 36, 979-982

Hoffman, P.F. and Halverson, G.P., 2008. Otavi Group of the western Northern Platform, the Eastern Kaoko Zone and the western Northern Margin Zone. In: R. McG. Miller (Ed.) The Geology of Namibia, Vol. 2, Geological Survey of Namibia (Windhoek), pp. 69-136.