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Uisdean Nicholson

@uisdeannicholson.bsky.social
86 followers 125 following 18 posts

Marine and sedimentary geologist. Ocean circulation, Earth hazards, impacts... Associate Prof at Heriot-Watt University. Hebridean provenance. Dad to 3 and husband to 1...

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Uisdean Nicholson @uisdeannicholson.bsky.social · 14/05/2025
@niobsidian.bsky.social as lead author...
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Uisdean Nicholson @uisdeannicholson.bsky.social · 14/05/2025
Oh, and another one in Newsweek! www.newsweek.com/new-discover...
newsweek.com
Scientists uncover giant waves that reveal how the Atlantic was formed
The Atlantic Ocean may have formed millions of years earlier than previously thought, igniting a period of climate change, scientists found.
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Uisdean Nicholson @uisdeannicholson.bsky.social · 14/05/2025
See here for the original paper: www.sciencedirect.com/science/arti...
sciencedirect.com
Early Cretaceous deep-water bedforms west of the Guinea Plateau revise the opening history of the Equatorial Atlantic Gateway
The Equatorial Atlantic Gateway (EAG) was critical to Earth's climatic and oceanographic evolution during the Mesozoic, yet its early opening history …
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Uisdean Nicholson @uisdeannicholson.bsky.social · 14/05/2025
and another one in IFL Science: www.iflscience.com/117-million-...
iflscience.com
Atlantic Ocean Was Only Born 117 Million Years Ago – And These Giant Mud Waves Tell The Story
The Atlantic Ocean has not been a permanent feature of planet Earth.
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Uisdean Nicholson @uisdeannicholson.bsky.social · 14/05/2025
Good to see this coverage of our recent paper in Live Science www.livescience.com/planet-earth...
livescience.com
Gigantic 'mud waves' buried deep beneath the ocean floor reveal dramatic formation of Atlantic when Africa and South America finally split
Enormous "mud waves" buried under the Atlantic seabed formed 117 million years ago as the Atlantic Ocean opened up.
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Uisdean Nicholson @uisdeannicholson.bsky.social · 25/04/2025
Still time to apply to our session on #contourites in #activemargins (or a more generic 'sister' proposal on contourites) at the upcoming ISC conference in New Zealand. Deadline on the 16th of May! See the links below... confer.co.nz/isc2026/down... confer.co.nz/isc2026/call...
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Uisdean Nicholson @uisdeannicholson.bsky.social · 18/03/2025
See below for a link to the original paper - mind-blowing seismic images, structural geology on a 20-second timescale... www.nature.com/articles/s43...
nature.com
3D anatomy of the Cretaceous–Paleogene age Nadir Crater - Communications Earth & Environment
A 9.2 km diameter rim, concentric normal faults and an extended damage zone are observed in 3-dimensional seismic reflection data from the Nadir crater offshore Western Africa and provide strong evide...
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Uisdean Nicholson @uisdeannicholson.bsky.social · 18/03/2025
Great to see that our paper on the 3D anatomy of the Nadir Crater was in the top 25 most successful (impactful?) papers in 2024 in Comms Earth & Environment!
nature.com
Top 25 papers of 2024
The top 25 most successful papers published in Communications Earth and Environment in 2024
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Uisdean Nicholson @uisdeannicholson.bsky.social · 07/03/2025
Huge thanks also to our colleagues Elisabetta Erba and Cinzia Bottini in Milan for their exceptional work in re-dating sediment cores for this work - would not have been possible without them
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Uisdean Nicholson @uisdeannicholson.bsky.social · 07/03/2025
Map of the reconstruction below!
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Uisdean Nicholson @uisdeannicholson.bsky.social · 07/03/2025
Lots more to come on this in future years, especially if our #IODP drilling proposal is scheduled any time soon!
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Uisdean Nicholson @uisdeannicholson.bsky.social · 07/03/2025
This pushes back the age of initial opening of the opening of the gateway to the mid-Aptian, around 117 million years ago. This also suggests that this early opening impacted global climate, with black shale deposited in these new, narrow basins leading to short-lived global cooling.
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Uisdean Nicholson @uisdeannicholson.bsky.social · 07/03/2025
In this area, we see evidence for incredible, multi-km scale sediment waves in the seismic data, that document saline waters flowing out from the restricted equatorial basins, into the Central Atlantic - similar to the Mediterranean Outflow Water in the present
Seismic reflection profile showing large sediment waves that formed during the Early Cretaceous period
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Uisdean Nicholson @uisdeannicholson.bsky.social · 07/03/2025
This study uses seismic reflection data to reconstruct overflow conditions and the marine connection from the earliest stage of opening of the Equatorial Atlantic Gateway, the new ocean connection that formed following the separation of Africa and South America in the Cretaceous Period
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Uisdean Nicholson @uisdeannicholson.bsky.social · 07/03/2025
Delighted to see this new paper led by my recent postdoc, Debora Duarte, published in Global and Planetary Change! #sedimentwaves, #contourites, #gateways www.sciencedirect.com/science/arti...
sciencedirect.com
Early Cretaceous deep-water bedforms west of the Guinea Plateau revise the opening history of the Equatorial Atlantic Gateway
The Equatorial Atlantic Gateway (EAG) was critical to Earth's climatic and oceanographic evolution during the Mesozoic, yet its early opening history …
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Uisdean Nicholson @uisdeannicholson.bsky.social · 28/02/2025
The paper uses seismic reflection data to reconstruct the stratigraphic evolution of the Guinea Plateau, with emphasis on the Equatorial Atlantic Gateway - a critical link between north and south Atlantic during the Cretaceous
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Uisdean Nicholson @uisdeannicholson.bsky.social · 28/02/2025
New paper in this Geological Society SP collection by my recent PhD student, Ben. The first from his PhD - well done Ben! www.lyellcollection.org/doi/full/10....
lyellcollection.org
Seismic stratigraphy of the Guinea Plateau before, during and after the opening of the Equatorial Atlantic Gateway | Geological Society, London, Special Publications
The Guinea Plateau contains a ∼200-million-year stratigraphic record, encompassing the mid-Cretaceous opening of the Equatorial Atlantic Gateway (EAG). Here we present new 2D seismic data to constrain...
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Reposted by Uisdean Nicholson
ECORD - European Consortium for Ocean Research Drilling @ecord.bsky.social · 18/12/2024
The Science Evaluation Panel (SEP) is central to the success of IODP3 and is responsible for the evaluation and selection of the best and most relevant proposals for development of expedition schedules. Be a part of it iodp3.org/call-for-app...
iodp3.org
Call for Applications - IODP3 Science Evaluation Panel Members - International Ocean Drilling Programme
Call for applications to serve as a member of the IODP3 Science Evaluation Panel (Science and Site subgroups) now open! The Science Evaluation Panel (SEP) is central to the success of IODP3 and is res...
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Uisdean Nicholson @uisdeannicholson.bsky.social · 19/12/2024
officially the most beautiful place on Earth, seen from the sky...
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Reposted by Uisdean Nicholson
Elda Miramontes @elda-miramontes.bsky.social · 13/02/2024
All the people out there interested in deep-ocean currents and contourites, should not miss this great compilation of articles in Marine Geology: doi.org/10.1016/j.ma... Thanks @uisdeannicholson.bsky.social and all other collaborations for making this happen.
Map with the location of all the studies that are part of the special issue.
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