Geological Society of America

The Early Cretaceous opening of the South Atlantic Ocean was accompanied by extensive intrusive and extrusive magmatism collectively grouped in the South Atlantic Igneous Province (SAIP). The SAIP includes the onshore Paraná-Etendeka large igneous province (PELIP), offshore seaward-dipping reflectors sequences, the Rio Grande Rise and Walvis Ridge, and voluminous intrusive magmatism. Nonetheless, the nature of the processes that lead to continental breakup remain controversial, and the environmental impact of these events is not yet fully understood. In order to investigate the tectonomagmatic evolution of the South Atlantic, a team of researchers recently presented a new compilation of the various geochemical compositions and radiometric ages associated with the SAIP as well as an estimation of magma volumes constrained by extensive seismic, gravity, and magnetic datasets. Learn more here: geosociety.co/MS #Magmatism #Geochemistry #Geoscience #Geology Mansour M. ABDELMALAK University of Oslo Lucas Rossetti UFMT - Universidade Federal de Mato Grosso John Millett Volcanic Basin Energy Research (VBER) Dougal Jerram DOUGALEARTH LTD Stephane Polteau Institute for Energy Technology

GSA's 2025 Geology Club Tee-Off continues tonight at midnight with the Cordilleran Section Tournament! Each round will provide approximately 24 hours for voting, running from 12:00 a.m. MT – 11:30 p.m. MT, and you can vote for your favorite geology clubs by following these simple instructions. How to Vote: 1. Visit the voting platform: geosociety.co/CD25 2. Click "Start Voting" at the top left of the window. 3. You’ll be prompted to enter your name and email address. 4. You’ll be shown paired geology club logo designs – choose your favorite in each matchup!? 5. The winners move forward in this bracket-style, single-elimination competition. 6. Keep voting in each new round until the champion is crowned. Voting Details: -First Round: Sunday, 30 March -Second Round: Monday, 31 March -Quarterfinals: Tuesday, 1 April -Semifinals: Wednesday, 2 April -Finals: Thursday, 3 April Have fun and support geology clubs everywhere by voting for your favorite logo designs! Best of luck to all of the participating geology clubs! #GeologyClubTeeOff #GeologyClub #Geoscience #EarthScience

This week at the 2025 Geological Society of America?Joint Northeastern and North-Central Section Meeting, I had a great experience presenting my team's research on compound bar stratigraphy throughout the Great Miami River and attending many fascinating lectures. I sincerely appreciate everyone who stopped by my poster presentation; your insightful questions and ideas on future directions and applications for our work were truly valuable.

The Championship Round of the Northeastern Section Tournament and North-Central Section Tournament for GSA's 2025 Geology Club Tee-Off is happening today until 11:30 p.m. MDT! The final matchup in the Northeastern Section Tournament is between Stockton University and Brooklyn College; and the final matchup in the North-Central Section Tournament is between Indiana University Indianapolis and Marietta College, with a few hours left to vote, don’t wait, cast your vote today! How to Vote: 1. Visit the voting platform:? Northeastern: geosociety.co/NE25 North-Central: geosociety.co/NC25 2. Click "Start Voting" at the top left of the window. 3. You’ll be prompted to enter your name and email address. 4. You’ll be shown paired geology club logo designs – choose your favorite! ? #GeologyClubTeeOff #GeologyClub #Geoscience #EarthScience

Therizinosaurs were a group of herbivorous/omnivorous theropod dinosaurs that lived in Asia and North America during the Cretaceous Period. These theropods are notable for their three-fingered hands sporting large claw-like unguals. A team of researchers recently revealed a new and unusual species of therizinosaurid, Duonychus tsogtbaatari, recovered from the Upper Cretaceous Bayanshiree Formation of the Gobi Desert in Mongolia. Learn more here: geosociety.co/DTM #Paleontology #Dinosaurs #Cretaceous #Geoscience Hokkaido University University of Calgary Anthony Fiorillo Chinzorig Tsogtbaatar North Carolina State University Mongolian Academy of Sciences

GSA’s 2025 Joint Northeastern and North-Central Section Meeting is off to a great start! Several attendees were lucky enough to explore some of the exceptional geologic features surrounding Erie, PA on GSA Field Trips yesterday, even turning up some fossils! Just a friendly reminder, to stay up to date on all of the amazing geoscience happening at this year’s meeting, take a look at our Meeting Program: geosociety.co/NENCP #GSASectionMeetings #NENCGSA2025 #Geoscience #Geology #EarthScience

An M7.7 earthquake struck overnight near Mandalay, Myanmar, as the result of strike slip faulting between the India and Eurasia plates. Focal mechanism solutions indicate that slip occurred on either a north-striking, steeply-dipping, right-lateral fault, or a west striking, steeply-dipping, left-lateral fault. The finite fault solution indicates a north striking right-lateral fault. This focal mechanism and finite fault solution are consistent with the earthquake potentially occurring on the right-lateral Sagaing Fault that lies in the fault zone that defines the plate boundary between the Indian and Sunda plates. While commonly plotted as points on maps, earthquakes of this size are more appropriately described as slip over a larger fault area. The finite fault solution indicates the size of this event is about 200 km by 20 km (length x width). This region has experienced similar large strike slip earthquakes, with six other magnitude 7 and larger earthquakes occurring within about 150 miles (250 km) of this earthquake since 1900. The most recent of these was a magnitude 7.0 earthquake in January 1990, which caused 32 buildings to fall. A magnitude 7.9 earthquake occurred south of today’s earthquake in February 1912. Within this broad zone of tectonic deformation, other large earthquakes include a magnitude 7.7 earthquake in 1988. #Earthquake #Mandalay #Geoscience #Seismology

I had a great time co-leading a fieldtrip for the Northeastern Geological Society of America meeting with State University of New York at Fredonia 's Thomas Hegna and Jasper Bateman. The Devonian never disappoints! #geology #Geosciences #Geoscience #geoscientists #geoscientist #geologyrocks

The Geological Society of America invites all undergraduate geoscience students to apply for GSA’s Section Research Grants! These grants support students conducting original research by providing funding to fuel their curiosity and advance their studies. In 2024, we proudly awarded grants to 12 exceptional students and we look forward to awarding even more this year! This is your chance to bring your research to life and join a growing community of future geoscience leaders! “It was such an incredible opportunity to experience science "in the field" rather than in a classroom. I got to see that there is so much that goes into field work both before and after the field season is over. Seeing a project from start to finish, working with data that I helped collect is truly a wonderful experience and made me feel like I was contributing to a project larger than myself.”?? -Kathleen Grube, Gustavus Adolphus College Learn more and apply by 10 April here: geosociety.co/RG25 #Geology #Geoscience #EarthScience #GeologyRocks

Wanting to revisit or vicariously experience some of the excitement from the South-Central and Southeastern Section Meetings? Pick up a copy of Field Guide 72: "From the Ozark Plateaus and Arkansas River Valley to the Shenandoah Valley," which contains a total of six trips related to those meetings: geosociety.co/SFG25 #GSAPubs #Shenandoah #Ozarks #Geology #GeologyRocks