The Geological Society of America (GSA)
@geosociety.bsky.social
The Geological Society of America (GSA) unites a diverse community of geoscientists in a common purpose to study the mysteries of our planet (and beyond) and share scientific findings.
Dinosaurian extinction—asteroid impact or volcanic activity? New research in #GSABulletin concludes that volcanism and resulting environmental degradation was the primary cause.
Read the full article: geosociety.co/4r1VG41
#Volcanology #Chicxulub #ImpactCrater
Image: Figure 4 from the paper.
Read the full article: geosociety.co/4r1VG41
#Volcanology #Chicxulub #ImpactCrater
Image: Figure 4 from the paper.
November 26, 2025 at 10:00 PM
Dinosaurian extinction—asteroid impact or volcanic activity? New research in #GSABulletin concludes that volcanism and resulting environmental degradation was the primary cause.
Read the full article: geosociety.co/4r1VG41
#Volcanology #Chicxulub #ImpactCrater
Image: Figure 4 from the paper.
Read the full article: geosociety.co/4r1VG41
#Volcanology #Chicxulub #ImpactCrater
Image: Figure 4 from the paper.
The GSA Holiday Gift Guide is here! 🎁 From maps and field guides to kids’ books and geo-swag, there’s something for every rock fan.
✨ 20% OFF with code: HOLIDAY20 through 1 December
📦 Order by 12 December for delivery before the 24th
Browse the Holiday Gift Guide: geosociety.co/Holiday20
✨ 20% OFF with code: HOLIDAY20 through 1 December
📦 Order by 12 December for delivery before the 24th
Browse the Holiday Gift Guide: geosociety.co/Holiday20
November 26, 2025 at 5:01 PM
The GSA Holiday Gift Guide is here! 🎁 From maps and field guides to kids’ books and geo-swag, there’s something for every rock fan.
✨ 20% OFF with code: HOLIDAY20 through 1 December
📦 Order by 12 December for delivery before the 24th
Browse the Holiday Gift Guide: geosociety.co/Holiday20
✨ 20% OFF with code: HOLIDAY20 through 1 December
📦 Order by 12 December for delivery before the 24th
Browse the Holiday Gift Guide: geosociety.co/Holiday20
Ethiopia’s Hayli Gubbi volcano just erupted for the first time in ~12,000 years—a reminder of how active the East African Rift really is. New Geosphere research shows how volcanism from Madagascar to the Comoros fits into a long east-to-west tectonic story shaping the region.
🔗 geosociety.co/4p5evSD
🔗 geosociety.co/4p5evSD
November 25, 2025 at 9:02 PM
Ethiopia’s Hayli Gubbi volcano just erupted for the first time in ~12,000 years—a reminder of how active the East African Rift really is. New Geosphere research shows how volcanism from Madagascar to the Comoros fits into a long east-to-west tectonic story shaping the region.
🔗 geosociety.co/4p5evSD
🔗 geosociety.co/4p5evSD
Looking for the right fit for your research? #Geosphere is great for layered figures. See open themed issues on earthquakes & on the Basin and Range: geosociety.co/4mv9wZH
Submit manuscript: geosociety.co/4oF6SCH
Read the latest issue of Geosphere: geosociety.co/4p61CHq
#Geoscience #Geology
Submit manuscript: geosociety.co/4oF6SCH
Read the latest issue of Geosphere: geosociety.co/4p61CHq
#Geoscience #Geology
November 25, 2025 at 6:00 PM
Looking for the right fit for your research? #Geosphere is great for layered figures. See open themed issues on earthquakes & on the Basin and Range: geosociety.co/4mv9wZH
Submit manuscript: geosociety.co/4oF6SCH
Read the latest issue of Geosphere: geosociety.co/4p61CHq
#Geoscience #Geology
Submit manuscript: geosociety.co/4oF6SCH
Read the latest issue of Geosphere: geosociety.co/4p61CHq
#Geoscience #Geology
How can a few zircon grains reshape a tectonic timeline? A new study tests MDAs using LA-ICP-MS and CA-ID-TIMS, revealing that deformation during the Late Jurassic Nevadan orogeny lasted longer than thought.
Read the full article: geosociety.co/3X0qXGO
Image: Figure 13 from the paper.
Read the full article: geosociety.co/3X0qXGO
Image: Figure 13 from the paper.
November 24, 2025 at 6:00 PM
How can a few zircon grains reshape a tectonic timeline? A new study tests MDAs using LA-ICP-MS and CA-ID-TIMS, revealing that deformation during the Late Jurassic Nevadan orogeny lasted longer than thought.
Read the full article: geosociety.co/3X0qXGO
Image: Figure 13 from the paper.
Read the full article: geosociety.co/3X0qXGO
Image: Figure 13 from the paper.
Arabian Peninsula volcanism in Alohali et al.’s “Refined chronology of late Quaternary eruptions, Harrat Khaybar, Saudi Arabia, with implications for magma dynamics & regional volcanic history”.
Full article here: geosociety.co/4hWW7bA
Image: Figure 3 from the paper.
Oregon State University CEOAS
Full article here: geosociety.co/4hWW7bA
Image: Figure 3 from the paper.
Oregon State University CEOAS
November 23, 2025 at 9:00 PM
Arabian Peninsula volcanism in Alohali et al.’s “Refined chronology of late Quaternary eruptions, Harrat Khaybar, Saudi Arabia, with implications for magma dynamics & regional volcanic history”.
Full article here: geosociety.co/4hWW7bA
Image: Figure 3 from the paper.
Oregon State University CEOAS
Full article here: geosociety.co/4hWW7bA
Image: Figure 3 from the paper.
Oregon State University CEOAS
Rethinking point-bar architecture: Insights from the meandering Powder River (Montana, USA)—Read the new study in #GSABulletin: geosociety.co/4nUzJBa
#FluvialGeomorphology #Sedimentology #Rivers #PowderRiver
Photo by USFWS
#FluvialGeomorphology #Sedimentology #Rivers #PowderRiver
Photo by USFWS
November 23, 2025 at 4:00 PM
Rethinking point-bar architecture: Insights from the meandering Powder River (Montana, USA)—Read the new study in #GSABulletin: geosociety.co/4nUzJBa
#FluvialGeomorphology #Sedimentology #Rivers #PowderRiver
Photo by USFWS
#FluvialGeomorphology #Sedimentology #Rivers #PowderRiver
Photo by USFWS
NEW books available now! 📚
Get the new editions of "Geysers: What They Are and How They Work" and "Roadside Geology of Texas" now at: geosociety.co/store
Everyone needs a new geology book for the holidays! 🎁
#Geology #EarthScience #Geysers #TexasGeology
Get the new editions of "Geysers: What They Are and How They Work" and "Roadside Geology of Texas" now at: geosociety.co/store
Everyone needs a new geology book for the holidays! 🎁
#Geology #EarthScience #Geysers #TexasGeology
November 22, 2025 at 7:00 PM
NEW books available now! 📚
Get the new editions of "Geysers: What They Are and How They Work" and "Roadside Geology of Texas" now at: geosociety.co/store
Everyone needs a new geology book for the holidays! 🎁
#Geology #EarthScience #Geysers #TexasGeology
Get the new editions of "Geysers: What They Are and How They Work" and "Roadside Geology of Texas" now at: geosociety.co/store
Everyone needs a new geology book for the holidays! 🎁
#Geology #EarthScience #Geysers #TexasGeology
EarthCache Spotlight: New Castle of Manzanares el Real, Madrid!
A medieval fortress in La Pedriza with stunning architecture and rich geology.
📍 Madrid, Spain
📊 Difficulty: 1.5/5 | Terrain: 1.5/5
🔗 Explore more: geosociety.co/earthcache
#Geology #Spain #EarthCache
A medieval fortress in La Pedriza with stunning architecture and rich geology.
📍 Madrid, Spain
📊 Difficulty: 1.5/5 | Terrain: 1.5/5
🔗 Explore more: geosociety.co/earthcache
#Geology #Spain #EarthCache
November 21, 2025 at 8:01 PM
EarthCache Spotlight: New Castle of Manzanares el Real, Madrid!
A medieval fortress in La Pedriza with stunning architecture and rich geology.
📍 Madrid, Spain
📊 Difficulty: 1.5/5 | Terrain: 1.5/5
🔗 Explore more: geosociety.co/earthcache
#Geology #Spain #EarthCache
A medieval fortress in La Pedriza with stunning architecture and rich geology.
📍 Madrid, Spain
📊 Difficulty: 1.5/5 | Terrain: 1.5/5
🔗 Explore more: geosociety.co/earthcache
#Geology #Spain #EarthCache
The GSA #2026Calendar, Timeless Terrain, showcases images of hoodoos, Percé Rock, & Erg Chebbi sand dunes. This go-to guide for dates keeps you engaged with events & programs that shape our science and our future.
Buy the 2026 calendar here: geosociety.co/43uOa7E
#Calendar #GeologyRocks #Geoscience
Buy the 2026 calendar here: geosociety.co/43uOa7E
#Calendar #GeologyRocks #Geoscience
November 21, 2025 at 6:00 PM
The GSA #2026Calendar, Timeless Terrain, showcases images of hoodoos, Percé Rock, & Erg Chebbi sand dunes. This go-to guide for dates keeps you engaged with events & programs that shape our science and our future.
Buy the 2026 calendar here: geosociety.co/43uOa7E
#Calendar #GeologyRocks #Geoscience
Buy the 2026 calendar here: geosociety.co/43uOa7E
#Calendar #GeologyRocks #Geoscience
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
Read the full issue: geosociety.co/4ewtd0c
#GSAPubs #Geology #Geoscience #EarthScience
November 19, 2025 at 10:00 PM
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
Read the full issue: geosociety.co/4ewtd0c
#GSAPubs #Geology #Geoscience #EarthScience
New #Geosphere research delivers the first systematic look at paleoearthquake timing along the Western Nepal fault system. All studied faults ruptured in the Holocene—pointing to complex multifault events and added seismic hazards in the Himalaya.
Read the full article: geosociety.co/47EIZ7G
Read the full article: geosociety.co/47EIZ7G
November 18, 2025 at 9:00 PM
New #Geosphere research delivers the first systematic look at paleoearthquake timing along the Western Nepal fault system. All studied faults ruptured in the Holocene—pointing to complex multifault events and added seismic hazards in the Himalaya.
Read the full article: geosociety.co/47EIZ7G
Read the full article: geosociety.co/47EIZ7G
The November issue of #Geology is now online. Topics include "Evolution of skeletal mineralogy in cheilostome bryozoans from calcite to aragonite seas" and "Unique leaf mimicry in Jurassic insects."
Read more at geosociety.co/3M2YZaY
#Jurassic #Mineralogy #GSAPubs
Read more at geosociety.co/3M2YZaY
#Jurassic #Mineralogy #GSAPubs
November 17, 2025 at 8:00 PM
The November issue of #Geology is now online. Topics include "Evolution of skeletal mineralogy in cheilostome bryozoans from calcite to aragonite seas" and "Unique leaf mimicry in Jurassic insects."
Read more at geosociety.co/3M2YZaY
#Jurassic #Mineralogy #GSAPubs
Read more at geosociety.co/3M2YZaY
#Jurassic #Mineralogy #GSAPubs
How did methane cycling respond to extreme warming ~56 Ma?
A new #Geology study finds salinity in a Paleocene–Eocene lake limited methane production, potentially buffering greenhouse gas feedbacks. Important insight as inland waters worldwide become more saline.
Read more: geosociety.co/4o2qMWx
A new #Geology study finds salinity in a Paleocene–Eocene lake limited methane production, potentially buffering greenhouse gas feedbacks. Important insight as inland waters worldwide become more saline.
Read more: geosociety.co/4o2qMWx
November 17, 2025 at 6:01 PM
How did methane cycling respond to extreme warming ~56 Ma?
A new #Geology study finds salinity in a Paleocene–Eocene lake limited methane production, potentially buffering greenhouse gas feedbacks. Important insight as inland waters worldwide become more saline.
Read more: geosociety.co/4o2qMWx
A new #Geology study finds salinity in a Paleocene–Eocene lake limited methane production, potentially buffering greenhouse gas feedbacks. Important insight as inland waters worldwide become more saline.
Read more: geosociety.co/4o2qMWx
EarthCache Spotlight: Newnan’s Lake, Florida 🌿
A shallow, clay-bottom basin shaped by time, hydrology & geology. Its wetlands slow drainage, water levels swing widely, and drought once revealed 100+ ancient canoes.
Explore more EarthCaches: geosociety.co/earthcache
#EarthCache #Geology
A shallow, clay-bottom basin shaped by time, hydrology & geology. Its wetlands slow drainage, water levels swing widely, and drought once revealed 100+ ancient canoes.
Explore more EarthCaches: geosociety.co/earthcache
#EarthCache #Geology
November 17, 2025 at 4:21 PM
EarthCache Spotlight: Newnan’s Lake, Florida 🌿
A shallow, clay-bottom basin shaped by time, hydrology & geology. Its wetlands slow drainage, water levels swing widely, and drought once revealed 100+ ancient canoes.
Explore more EarthCaches: geosociety.co/earthcache
#EarthCache #Geology
A shallow, clay-bottom basin shaped by time, hydrology & geology. Its wetlands slow drainage, water levels swing widely, and drought once revealed 100+ ancient canoes.
Explore more EarthCaches: geosociety.co/earthcache
#EarthCache #Geology
Ever wondered how giant blobs of magma (plutons) get stuck in Earth’s crust?
In the new episode of Geology Bites, Geologist Keith Klepeis discusses his exciting work studying ancient magma pathways, dikes and sills, that once carried molten rock upward.
🎧 Listen now: geosociety.co/magma
In the new episode of Geology Bites, Geologist Keith Klepeis discusses his exciting work studying ancient magma pathways, dikes and sills, that once carried molten rock upward.
🎧 Listen now: geosociety.co/magma
November 16, 2025 at 8:00 PM
Ever wondered how giant blobs of magma (plutons) get stuck in Earth’s crust?
In the new episode of Geology Bites, Geologist Keith Klepeis discusses his exciting work studying ancient magma pathways, dikes and sills, that once carried molten rock upward.
🎧 Listen now: geosociety.co/magma
In the new episode of Geology Bites, Geologist Keith Klepeis discusses his exciting work studying ancient magma pathways, dikes and sills, that once carried molten rock upward.
🎧 Listen now: geosociety.co/magma
Ever wonder how GPS can pinpoint your location so accurately?
In a recent episode of Geology Bites, MIT’s Tom Herring discusses exciting new developments in high-precision geodesy.
Listen now: geosociety.co/43GicoX
#Geodesy #GPS #GeosciencePodcast #GeologtBites
In a recent episode of Geology Bites, MIT’s Tom Herring discusses exciting new developments in high-precision geodesy.
Listen now: geosociety.co/43GicoX
#Geodesy #GPS #GeosciencePodcast #GeologtBites
November 15, 2025 at 9:00 PM
Ever wonder how GPS can pinpoint your location so accurately?
In a recent episode of Geology Bites, MIT’s Tom Herring discusses exciting new developments in high-precision geodesy.
Listen now: geosociety.co/43GicoX
#Geodesy #GPS #GeosciencePodcast #GeologtBites
In a recent episode of Geology Bites, MIT’s Tom Herring discusses exciting new developments in high-precision geodesy.
Listen now: geosociety.co/43GicoX
#Geodesy #GPS #GeosciencePodcast #GeologtBites
Discover how planetary scientists and astronauts learn from Earth itself in “Analogs for Planetary Exploration” (edited by W. Brent Garry & Jacob E. Bleacher).
Buy a PDF of the book today: geosociety.co/4i11R4l
#PlanetaryScience #Astronaut #FieldTrips #Moon #Mars
Buy a PDF of the book today: geosociety.co/4i11R4l
#PlanetaryScience #Astronaut #FieldTrips #Moon #Mars
November 15, 2025 at 5:01 PM
Discover how planetary scientists and astronauts learn from Earth itself in “Analogs for Planetary Exploration” (edited by W. Brent Garry & Jacob E. Bleacher).
Buy a PDF of the book today: geosociety.co/4i11R4l
#PlanetaryScience #Astronaut #FieldTrips #Moon #Mars
Buy a PDF of the book today: geosociety.co/4i11R4l
#PlanetaryScience #Astronaut #FieldTrips #Moon #Mars
GSA was proud to support the 7th Annual Fería de las Ciencias de la Tierra y el Espacio in Puerto Vallarta! Students explored earthquakes, volcanoes, tides, hurricanes & more—guided by members of the scientific community.
Learn more: raugm.org.mx/feria
#PuertoVallarta2025 #CienciaParaTodos
Learn more: raugm.org.mx/feria
#PuertoVallarta2025 #CienciaParaTodos
November 14, 2025 at 10:22 PM
GSA was proud to support the 7th Annual Fería de las Ciencias de la Tierra y el Espacio in Puerto Vallarta! Students explored earthquakes, volcanoes, tides, hurricanes & more—guided by members of the scientific community.
Learn more: raugm.org.mx/feria
#PuertoVallarta2025 #CienciaParaTodos
Learn more: raugm.org.mx/feria
#PuertoVallarta2025 #CienciaParaTodos
New #GSABulletin research uncovers Andean-type plutons hidden within the Spanish Central System batholith. The study suggests back-arc basin closure and subduction of hyperextended Gondwanan crust enabled transient oceanic input.
Read the full paper: geosociety.co/47S52GQ
#Geology #Petrology
Read the full paper: geosociety.co/47S52GQ
#Geology #Petrology
November 14, 2025 at 9:01 PM
New #GSABulletin research uncovers Andean-type plutons hidden within the Spanish Central System batholith. The study suggests back-arc basin closure and subduction of hyperextended Gondwanan crust enabled transient oceanic input.
Read the full paper: geosociety.co/47S52GQ
#Geology #Petrology
Read the full paper: geosociety.co/47S52GQ
#Geology #Petrology
What controls rifted margin symmetry? New #Geology models show that mechanical anisotropy alone can shift rifts from symmetric to asymmetric—no rheology changes needed. Even moderate anisotropy can reshape rift systems.
Read more: geosociety.co/3JFKdGy
#Geodynamics #Lithosphere #Geoscience #GSAPubs
Read more: geosociety.co/3JFKdGy
#Geodynamics #Lithosphere #Geoscience #GSAPubs
November 14, 2025 at 6:55 PM
What controls rifted margin symmetry? New #Geology models show that mechanical anisotropy alone can shift rifts from symmetric to asymmetric—no rheology changes needed. Even moderate anisotropy can reshape rift systems.
Read more: geosociety.co/3JFKdGy
#Geodynamics #Lithosphere #Geoscience #GSAPubs
Read more: geosociety.co/3JFKdGy
#Geodynamics #Lithosphere #Geoscience #GSAPubs
Meet Gladys Pantoja, a PhD candidate at Clarkson University and two-time GSA On To the Future (OTF) scholar. Gladys champions diversity and mentorship, showing how OTF transforms careers and builds community.
🔗 Learn more about OTF: geosociety.co/OTF
#OnToTheFuture #GSAConnects #Geoscience
🔗 Learn more about OTF: geosociety.co/OTF
#OnToTheFuture #GSAConnects #Geoscience
November 9, 2025 at 1:00 AM
Meet Gladys Pantoja, a PhD candidate at Clarkson University and two-time GSA On To the Future (OTF) scholar. Gladys champions diversity and mentorship, showing how OTF transforms careers and builds community.
🔗 Learn more about OTF: geosociety.co/OTF
#OnToTheFuture #GSAConnects #Geoscience
🔗 Learn more about OTF: geosociety.co/OTF
#OnToTheFuture #GSAConnects #Geoscience
Big ideas start close to home. 🌎
Abstract submissions for GSA’s 2026 Section Meetings are OPEN! Share your regional discoveries, connect with peers, and shape the future of geoscience.
🗓️ Deadline: Jan 13, 2026
🔗 geosociety.co/SectionMeetings
Abstract submissions for GSA’s 2026 Section Meetings are OPEN! Share your regional discoveries, connect with peers, and shape the future of geoscience.
🗓️ Deadline: Jan 13, 2026
🔗 geosociety.co/SectionMeetings
November 7, 2025 at 8:59 PM
Big ideas start close to home. 🌎
Abstract submissions for GSA’s 2026 Section Meetings are OPEN! Share your regional discoveries, connect with peers, and shape the future of geoscience.
🗓️ Deadline: Jan 13, 2026
🔗 geosociety.co/SectionMeetings
Abstract submissions for GSA’s 2026 Section Meetings are OPEN! Share your regional discoveries, connect with peers, and shape the future of geoscience.
🗓️ Deadline: Jan 13, 2026
🔗 geosociety.co/SectionMeetings
What if geothermal energy could power the nation? 🔥
In a new #GSAConnectscast feature, USGS scientists explore how geothermal research is shaping a more sustainable energy future.
🎥 Watch now: geosociety.co/geothermal
#USGS #GeothermalEnergy #EnergyTransition #Sustainability
In a new #GSAConnectscast feature, USGS scientists explore how geothermal research is shaping a more sustainable energy future.
🎥 Watch now: geosociety.co/geothermal
#USGS #GeothermalEnergy #EnergyTransition #Sustainability
November 6, 2025 at 7:02 PM
What if geothermal energy could power the nation? 🔥
In a new #GSAConnectscast feature, USGS scientists explore how geothermal research is shaping a more sustainable energy future.
🎥 Watch now: geosociety.co/geothermal
#USGS #GeothermalEnergy #EnergyTransition #Sustainability
In a new #GSAConnectscast feature, USGS scientists explore how geothermal research is shaping a more sustainable energy future.
🎥 Watch now: geosociety.co/geothermal
#USGS #GeothermalEnergy #EnergyTransition #Sustainability
The November issue of GSA Today is packed with discovery—mountain bending in Alaska, a new way to visualize lithium resources, and the story of Victorian scientist Hertha Ayrton.
🔗 Read the newest issue here: geosociety.co/4qI5Gz5
#GSAToday #Geoscience #GSAPubs
🔗 Read the newest issue here: geosociety.co/4qI5Gz5
#GSAToday #Geoscience #GSAPubs
November 5, 2025 at 8:01 PM
The November issue of GSA Today is packed with discovery—mountain bending in Alaska, a new way to visualize lithium resources, and the story of Victorian scientist Hertha Ayrton.
🔗 Read the newest issue here: geosociety.co/4qI5Gz5
#GSAToday #Geoscience #GSAPubs
🔗 Read the newest issue here: geosociety.co/4qI5Gz5
#GSAToday #Geoscience #GSAPubs