Uisdean Nicholson
@uisdeannicholson.bsky.social
Marine and sedimentary geologist. Ocean circulation, Earth hazards, impacts... Associate Prof at Heriot-Watt University. Hebridean provenance. Dad to 3 and husband to 1...
@niobsidian.bsky.social as lead author...
May 14, 2025 at 1:40 PM
@niobsidian.bsky.social as lead author...
See here for the original paper: www.sciencedirect.com/science/arti...
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 …
www.sciencedirect.com
May 14, 2025 at 1:05 PM
See here for the original paper: www.sciencedirect.com/science/arti...
and another one in IFL Science: www.iflscience.com/117-million-...
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.
www.iflscience.com
May 14, 2025 at 1:05 PM
and another one in IFL Science: www.iflscience.com/117-million-...
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...
www.nature.com/articles/s43...
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...
www.nature.com
March 18, 2025 at 8:15 AM
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...
www.nature.com/articles/s43...
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
March 7, 2025 at 9:22 AM
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
Map of the reconstruction below!
March 7, 2025 at 9:20 AM
Map of the reconstruction below!
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.
March 7, 2025 at 9:13 AM
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.
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
March 7, 2025 at 9:13 AM
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
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
March 7, 2025 at 9:13 AM
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
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
February 28, 2025 at 2:28 PM
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