Peter Crockford
@earth2pete.bsky.social
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Assistant Professor at Carleton University
pinned post!
I am extremely honoured to have been awarded a 2025 Sloan Fellowship. A huge thank you to the Sloan foundation for their support and to my mentors for getting me here.
add a skeleton here at some point
over 1 year ago
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New Paper!
www.nature.com/articles/s43...
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Revisiting the greatness of Earth’s great oxidation - Communications Earth & Environment
Advancements in modeling, proxy integration, geochronology, and clarity on the nature of Paleoproterozoic glaciations are essential to improve understanding of the Great Oxidation Event, according to ...
https://www.nature.com/articles/s43247-026-03518-8
about 1 month ago
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New Paper on Sturtian Barite!
pubs.geoscienceworld.org/gsa/geology/...
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Mantle-like Sr isotopes in a Sturtian cap carbonate in Oman | Geology | GeoScienceWorld
https://pubs.geoscienceworld.org/gsa/geology/article/doi/10.1130/G53385.1/659183/Mantle-like-Sr-isotopes-in-a-Sturtian-cap
11 months ago
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www.science.org/doi/10.1126/...
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Evidence for Hadean mafic intrusions in the Nuvvuagittuq Greenstone Belt, Canada
Many questions remain regarding Earth’s earliest crust owing to the rarity of Hadean (>4.03 billion-year-old) rocks and minerals. The Nuvvuagittuq Greenstone Belt (NGB) in Canada may be the only known...
https://www.science.org/doi/10.1126/science.ads8461
11 months ago
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New Paper Depositional Controls on ∆′17O Signatures of Sedimentary Sulfate - Crockford - 2025 - Geophysical Research Letters - Wiley Online Library
agupubs.onlinelibrary.wiley.com/doi/10.1029/...
Thanks to all of the folks who helped this over the finish line.
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Depositional Controls on ∆′17O Signatures of Sedimentary Sulfate
Sulfate triple oxygen isotope signatures are most consistent with terrestrial pyrite oxidation and subsequent dilution Depositional environment must be considered in the translation of sulfate ∆′...
https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024GL114184
11 months ago
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reposted by
Peter Crockford
Chad Briggs
about 1 year ago
www.pnas.org/doi/10.1073/...
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reposted by
Peter Crockford
Jay T. Cullen
about 1 year ago
🌊🧪Job Alert!!!
@oceannetworks.ca
is looking for a Chief Executive Officer. Come join us at the University of Victoria 🇨🇦
www.linkedin.com/jobs/view/ch...
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Ocean Networks Canada hiring Chief Executive Officer in Victoria, British Columbia, Canada | LinkedIn
Posted 11:14:22 PM. Ocean Networks Canada (ONC) is a world-leading, not-for-profit organization that supports ocean…See this and similar jobs on LinkedIn.
https://www.linkedin.com/jobs/view/chief-executive-officer-at-ocean-networks-canada-4224048363/?refId=9%2BkPEP8k0YYxuynyhLdQfg%3D%3D&trackingId=6ThlLnX3QCcNhmgCEx9Pew%3D%3D&originalSubdomain=ca
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reposted by
Peter Crockford
Dr. Ichiko Sugiyama (she/her)
about 1 year ago
Paper alert 🚨 Interaction of metal oxyions with carbonate green rust in seawater is out now! This is one of the few papers that investigated metal uptake with GRCO3 in seawater and conducted 1 year aging experiments! Link here:
www.sciencedirect.com/science/arti...
#biogeochemistry
#metal
#greenrust
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Interaction of metal oxyions and phosphate with carbonate green rust: Insights into Earth’s modern and ancient environments
Carbonate green rust (GRCO3) is often found in suboxic and anoxic environments, and is known to be highly reactive towards dissolved metals and other …
https://www.sciencedirect.com/science/article/pii/S0016703725001346
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New Paper!
rdcu.be/ebWko
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Marine sulphate captures a Paleozoic transition to a modern terrestrial weathering environment
Nature Communications - Ancient sulfate mineral compositions reflect an increase in Earth’s oxidation state ~400 million years ago, likely including an increase in atmospheric oxygen levels...
https://rdcu.be/ebWko
about 1 year ago
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I am extremely honoured to have been awarded a 2025 Sloan Fellowship. A huge thank you to the Sloan foundation for their support and to my mentors for getting me here.
add a skeleton here at some point
over 1 year ago
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Marine Zn limitation is a thing
bg.copernicus.org/articles/21/...
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High metabolic zinc demand within native Amundsen and Ross sea phytoplankton communities determined by stable isotope uptake rate measurements
Abstract. Zinc (Zn) is an essential micronutrient for most eukaryotic phytoplankton. Zn uptake by phytoplankton within the euphotic zone results in nutrient-like dissolved Zn (dZn) profiles with a lar...
https://bg.copernicus.org/articles/21/5685/2024/
over 1 year ago
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reposted by
Peter Crockford
David Ho
over 1 year ago
I'll never understand how bottom trawling is legal. 🌊
www.nature.com/articles/s41...
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Long-term carbon storage in shelf sea sediments reduced by intensive bottom trawling - Nature Geoscience
Intensive bottom trawling causes a long-term reduction of organic carbon stored in seafloor sediments, suggesting a need for more effective management, according to observations and biogeochemical mod...
https://www.nature.com/articles/s41561-024-01581-4
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New Paper on the history of the sulfur cycle!
can01.safelinks.protection.outlook.com?url=https%3A...
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The history of Earth’s sulfur cycle
Nature Reviews Earth & Environment - The redox transformations of sulfur mean it is a key component of global biogeochemical cycles. This Review explores the sulfur cycle over geological time,...
https://can01.safelinks.protection.outlook.com/?url=https%3A%2F%2Frdcu.be%2Fd2vpe&data=05%7C02%7Cpetercrockford%40cunet.carleton.ca%7Cb8c66d7b0dfd4f9dab5e08dd1518dba8%7C6ad91895de06485ebc51fce126cc8530%7C0%7C0%7C638689918692013894%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=Np7BrHpmVHpJAZzEefYmGh7rWw2g7dHQ0sRuJE6JlCE%3D&reserved=0
over 1 year ago
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reposted by
Peter Crockford
bioRxiv Evolutionary Biology
over 2 years ago
Experimental Snowball Earth Viscosity Drives the Evolution of Motile Multicellularity https://www.biorxiv.org/content/10.1101/2024.02.06.579218v1
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Experimental Snowball Earth Viscosity Drives the Evolution of Motile Multicellularity https://www.biorxiv.org/content/10.1101/2024.02.06.579218v1
During the 70-million-year span of the Cryogenian Snowball Earth glaciations, low ocean temperatures
https://www.biorxiv.org/content/10.1101/2024.02.06.579218v1
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New Paper! “The Geologic History of Primary Productivity” With Itay Halevy, Ron Milo, Yinon Bar On and Luce Ward
www.sciencedirect.com/science/arti...
Link:
drive.google.com/file/d/1KoXa...
And featured in the New York Times!
www.nytimes.com/2023/12/01/s...
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The geologic history of primary productivity
The rate of primary productivity is a keystone variable in driving biogeochemical cycles today and has been throughout Earth’s past.1 For example, it …
https://www.sciencedirect.com/science/article/abs/pii/S0960982223012861?dgcid=author
over 2 years ago
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