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geosociety.bsky.social
A 450-million-year-old horseshoe crab fossil from Michigan preserves the oldest known ovaries! Despite its shovel shaped head, its reproductive anatomy mirrors modern crabs—showing evolutionary mosaicism in action.

Read now: geosociety.co/4jH0h6P
#Geology #Paleontology #GSAPubs
June 14, 2025 at 7:32 PM
paleosol.bsky.social
Two new papers: we re-dated the Buluk fossil site in Turkana, Kenya, and applied proxies to reconstruct climate and vegetation. Out now in GSA Bulletin!

@danpeppe.bsky.social @munyaka.bsky.social @kevinuno.bsky.social @geosociety.bsky.social
#MammalMonday #isotope #GSAPubs
🧪⚒️🌱🌦️🐒
September 21, 2026 at 4:58 PM
geosociety.bsky.social
Did you know sand grains record their transport history?

New research in Geology shows zircon grains reveal their journey through microscopic abrasion “microtextures”—even in billion-year-old rocks!

Read more: geosociety.co/4oHG2J6
#Geology #GSAPubs
November 1, 2025 at 12:32 PM
geosociety.bsky.social
A new #GSABulletin study analyzes 544 biostratigraphic events across 108 sites in the Mississippi Embayment, revealing patterns of Upper Cretaceous sea-level change and faunal turnover.

🔗 geosociety.co/4fqiogL
#Stratigraphy #CretaceousPeriod #GSAPubs
August 24, 2025 at 7:43 PM
geosociety.bsky.social
What shaped massive microbial buildups 500+ million years ago in Texas?

A new #GSABulletin study links sea level shifts, sedimentation, and microbial activity in the Upper Cambrian.

Read more: geosociety.co/4lcHMaY
#Geology #TexasGeology #GSAPubs
August 19, 2025 at 4:49 PM
geosociety.bsky.social
New research in #GSABulletin explores how magma moves through shallow, faulted sediments—using exceptional coastal exposures in the western Pyrenees.

Read more: geosociety.co/Agirrezabala_Sarrionandia
#Volcanology #StructuralGeology #GSAPubs
Image: Figure 4 from the paper.
March 28, 2026 at 8:00 PM
geosociety.bsky.social
How long did it take for life to bounce back after the KPg asteroid impact and mass extinction event 66 million years ago? ☄️ A new #Geology study found that life recovered much faster than we previously thought.

🔗 Read the full study: geosociety.co/Lowery_et_al
#MassExtinction #Chicxulub #GSAPubs
February 21, 2026 at 10:00 PM
geosociety.bsky.social
New research uncovers fresh geological insights into Brazil’s 40-km-wide Araguainha impact structure.

Explore the full article: geosociety.co/48Eyhxc
#ImpactCratering #Geology #Tectonics #Brazil #GSABulletin #GSAPubs
Image: Figure 14 from the paper.
January 2, 2026 at 8:00 PM
geosociety.bsky.social
Tiny zircon grains = big tectonic clues.

A new #GSABulletin study traces ancient links between Arctic Alaska, Baltica & Laurentia using detrital zircon geochronology—offering a two-part model for the Amerasia Basin’s opening.

🔗 geosociety.co/4eClz4O
#ArcticGeology #GSAPubs
July 6, 2025 at 2:26 PM
geosociety.bsky.social
The Nov/Dec issue of #GSABulletin is now online! Explore new research across the geosciences and check out this month’s stunning cover featuring a large microbial buildup in the Upper Cambrian Wilberns Formation.

Read the full issue: geosociety.co/4ewtd0c
#GSAPubs #Geology #Geoscience #EarthScience
November 19, 2025 at 10:00 PM
geosociety.bsky.social
The January 2026 issue of #Geology is available online. Scanning electron microscope images of zircon sand grains from Algodones Dunes, California, USA.

Read the full issue: geosociety.co/Geology_Jan26
#GSAPubs
Photo by M. Colin Marvin.
January 19, 2026 at 4:01 PM
geosociety.bsky.social
New from GSA Special Papers! The Virtue of Fieldwork celebrates Cathy Busby’s career with studies spanning volcanology, tectonics, sedimentology & more—from California to Taiwan.

Explore the legacy: geosociety.co/454xIfH
#GSAPubs #Geology
August 12, 2025 at 7:55 PM
geosociety.bsky.social
New #GSABulletin research links volcanism, environment, and marine influence in forming giant karstic bauxite deposits—using Hg and isotope data from China’s largest bauxite belts.

📖 Read more: geosociety.co/41s4S6s
#Geology #Geochemistry #GSAPubs
August 27, 2025 at 5:21 PM
geosociety.bsky.social
A new #GSABulletin study of rift-related volcanism shows that 3-D fault structure controls magma pathways, eruption volumes, and whether melts evolve to felsic or stay mafic.

Read more: geosociety.co/Haproff_et_al
#RiftTectonics #BasinAndRange #GSAPubs
Image: Figure 1 from the paper.
March 29, 2026 at 4:00 PM
geosociety.bsky.social
New from #Geology: The August issue is live!

Explore fossilized horseshoe crab ovaries, a 1 Ga meteorite impact in Scotland, plant-driven arc magmatism, and early Holocene wetness in the U.S. Southwest.

Cover by Amy Gartman.
Read: geosociety.co/4flt6oR
#GSAPubs #Geoscience
August 11, 2025 at 5:08 PM
geosociety.bsky.social
Two new studies in #GSABulletin trace lithium’s deep-time journey in Western Canada—revealing sediment-sourced brines and wind-blown evaporites rich in Li. A game-changer for finding future resources!

🔗 Source to sink: geosociety.co/4lWBLQP
🔗 Wind: geosociety.co/4lSPbNu
#Geology #GSAPubs
July 16, 2025 at 6:08 PM
geosociety.bsky.social
A new #GSABulletin study uncovers subtle disconformities in the Ohio Shale, revealing gaps shaped by shifting currents and tectonics.

Explore the findings: geosociety.co/4muwobT
#Geology #GSAPubs
August 7, 2025 at 3:09 PM
geosociety.bsky.social
Just published in #GSABulletin!
Pizzati and colleagues introduce a new, easy-to-use method for calculating 3-D particle sizes from 2-D images—more accurate and compatible with standard tools.

Read more: geosociety.co/45dWF7a
#Geology #GSAPubs
August 15, 2025 at 5:31 PM
geosociety.bsky.social
A new paper redefines transform faults. Read “Transform fault system: A microplate-based perspective on transform faults” in #GSABulletin.

Read the full paper by Sanzhong Li et al.: geosociety.co/4a4kTVr
#Tectonics #GlobalTectonics #StructuralGeology #GSAPubs
Image: Figure 1 from the paper.
January 1, 2026 at 10:00 PM
geosociety.bsky.social
Did you know that magma can ascend like rain through the upper mantle?

Learn more from this new #Geology paper by Changyeol Lee and colleagues: geosociety.co/4iHVNhk
#GSAPubs #IntraplateVolcanism #Geodynamics #Magmatic
December 23, 2025 at 12:00 AM
geosociety.bsky.social
510-Ma fossils from North China reveal that some of Earth’s earliest animals built skeletons with cell-controlled organic templates — pushing back the origin of this strategy to the Cambrian explosion.

Read more: geosociety.co/4fD7wwm
#GSAPubs #Paleontology
August 28, 2025 at 7:59 PM
geosociety.bsky.social
New from #Geology: Could fairy circles signal underground hydrogen? Martin Schöpfer’s team models how these shallow depressions form when hydrogen flow stops—hinting at a clean, natural energy source below.

Read: geosociety.co/3FMVC5q
#GSAPubs #Hydrogen
June 17, 2025 at 4:14 PM
geosociety.bsky.social
The June 2025 issue of #Geology is here! Highlights include:

🔹 An invasion model for the start of Paleo-Pacific subduction
🔹 Plow versus Ice Age
🔹 Fossil feathers from the Colli Albani volcanic complex

Read now: geosociety.co/4jD6W1N
#Geology #GSAPubs #IceAge #Volcano
June 13, 2025 at 4:24 PM
geosociety.bsky.social
Planning a real or virtual field trip to Iceland? 🌋

GSA Field Guide 54 explores its volcanic, tectonic & glacial landscapes—plus geothermal energy, geomorphology & more.

Get your copy: geosociety.co/40yPPYt
#Iceland #GSAPubs #Geology #Geothermal #Glaciation
July 24, 2025 at 7:09 PM
geosociety.bsky.social
New in #GSABulletin: M.N. Ducea and colleagues explore the role of crustal magmatism in the formation and the evolution of orogenic plateaus.

Read the paper and learn more here: geosociety.co/Ducea_et_al
#Geochemistry #Petrology #Tectonics #GSAPubs
Image: Figure 17 from the paper.
February 19, 2026 at 8:00 PM