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The Geological Society of America (GSA) unites earth scientists and facilitates the sharing of scientific findings about our planet and universe.
Joined December 2008
It was truly inspiring to see so many diverse perspectives and experiences reflected throughout #GSAConnects2024. We look forward to sharing more over the coming days!. #GSA2024 #Geology #Geoscience #EarthScience #GeologyRocks @TargetedFilms
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Earth’s mantle is divided by the circum-Pacific subduction girdle into the African & Pacific domains, each with an LLSVP in the lower mantle. How this hemispherical-scale structure links to Earth’s plate tectonic evolution remains unclear: #GeologyRocks
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Fault scarps at Mid-Ocean Ridges (MOR) are recognizable on the seafloor, and often measured to estimate the tectonic component of plate divergence. This estimate, based on linear fault scarp parameters, is referred to as apparent tectonic strain (ATS). A team of researchers
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On 26 December 2004 a devastating M 9.1 earthquake off the west coast of northern Sumatra occurred as the result of thrust faulting on the interface of the India plate and the Burma microplate. In a period of minutes, the faulting released elastic strains that had accumulated for
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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
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Your GSA time scale sticker is still current! 12 members of the international Subcommission on Quaternary Stratigraphy (SQS) recently voted against a proposal to designate the #Anthropocene in geologic time. Read more here: #GeologicTimeScale @GSAgeochron
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GSA #SciComm Fellow @bdzombak on the #SpeakingofGeoscience Blog: 'Queer visibility in geoscience has been almost nonexistent for decades. A new generation is working to change that.'.#GSA2020
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A statement from the Chair of the Geological Society of America's Geochronology Division regarding the Anthropocene decision:. "I am ecstatic that the procedural vote by the Subcommission on Quaternary Stratigraphy (SQS) has made the news. The fact that they have spent 15 years
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An increase in the convergence rate between India & Eurasia ~65 Ma remains a complex geological event to explain, given the inherent uncertainty surrounding tectonic history & the intricate interplay of forces influencing plate speed: #GeologyRocks
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GSA's TIME SCALE 5.0 is now online. Download yours at --posters go on sale next seek #geoscience
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Strongly alkaline potassic magmas, such as lamproites and kimberlites, are prime examples of melts that require metasomatized mantle sources containing hydrous minerals, but the exact source assemblage and melt generation process is not well-understood. A team of researchers
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GSA stands with our African American colleagues and their families in facing injustice. We are committed to challenging and changing the biases that lead to discriminatory practices against people of color. Full statement: .#BlackLivesMatter #BlackinSTEM
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A team of geoscientists recently discovered dinosaur tracks found in pre-Aptian Brazil & Cameroon sediments that were originally produced 1000 km apart on a single #Gondwanan continent They now lie on opposite sides of that ocean some 6000 km apart:
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A large #landslide occurred in Greenland on 16 Sept 2023 that generated a 200m #tsunami. The event was energetic enough to produce a global seismic signal that resonated for 9 days. Learn more here: #Seismology #Geology #Geoscience #GeologyRocks
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Extinct offshore volcano could store gigatons of carbon dioxide.Contributed by GSA #SciComm Fellow @labtalk_laura Featured paper from #GEOLOGY by @Olenellus and @GambixPT #sequestration #geoscience @NOVAunl
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Plastic Pollution in the Deep Sea: A Geological Perspective.Featured Focus article in #GEOLOGY:
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The Woman Who Changed the Way We See the Seafloor -.Marie Tharp’s historic maps of underwater topography reimagined two-thirds of the Earth. By GSA Councilor @geosuzanne @atlasobscura .Image credit: @LamontEarth and Estate of Marie Tharpe .#MarieTharp100
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Remarkable Jurassic fossil reveals ammonite muscles in 3D .Featured paper from #GEOLOGY.Ammonite image by Cherns et al. Follow for an interactive 3D reconstruction.
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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,
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A recent study has stirred up the debate on when the #CentralAmericanSeaway closed, a pivotal event that altered oceanic circulation between the Pacific & Atlantic & connected the Americas. Learn more in GSA Bulletin: #Tectonics #Oceanography #Miocene
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The @forestservice recently purchased land that contains a fossilized dinosaur trackway consisting of 134 consecutive footprints, 106 yards long, known as the West Gold Hill Dinosaur Track site, it is the largest continuous dinosaur trackway in the world:
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A team of int'l geoscientists recently used geochronology & thermobarometry to investigate deep crustal processes during the genesis of the Late Cretaceous–Palaeocene Laramide Porphyry Province in Arizona: #Geochronology #Geoscience #GeologyRocks
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Glacier Detachments: A New Hazard in a Warming World?.via @GeoTravelTerri Featured article from #GEOLOGY: @CUBoulder @CIRESnews .@NatlParkService @WrangellStENPS
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A basaltic submarine eruption offshore the island of Mayotte between July 2018 & January 2021 is one of the largest documented underwater eruptions. Geoscientists recently analyzed precise earthquake locations & focal mechanisms associated with this event:
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Calderas are depressions formed by some of the largest volcanic eruptions. Their long-lived inter-eruptive periods are occasionally interrupted by phases of unrest, during which escalating seismicity, ground deformation and gas emissions raise concerns of potential volcanic
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‘On the role of tectonics in stimulating the Cretaceous diversification of mammals’, published in Earth-Science Reviews, explores the work of GSA Fellow @NathanANiemi & GSA Members @lukenweaver, @GeochemJulia & Robert Holder: @MichiganEarth #Tectonics
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Private & publicly funded projects to expedite the exploration of #GeologicHydrogen as a source of energy are gaining increasing momentum, with investments focused on identifying potential reservoirs & determining technical solutions for infrastructure:
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Due to the generosity of our members, GSA student members will be able to register for #GSA2020 Connects Online at no cost. Learn more (and find out about financial assistance to become a member) and register at
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Deep-Sea Plastic Accumulations by Turbidity Currents: NW South China Sea Featured article #openaccess in #GEOLOGY:
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A growing body of evidence suggests that the spin of Earth’s core has changed, so a team of int'l geoscientists recently examined ‘Inner core backtracking by seismic waveform change reversals’ to determine inner core progression & regression: @Nature
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The theme for Day 2 of #BlackinGeoscienceWeek is Geosphere! Follow @BlkinGeoscience.#BlackinEarthSystems .#BlackInGeosphere .#BiGWeek and pre-register for events and panels:
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Seismic anisotropy could provide vital information about the evolution & internal convection of deep Earth’s interior. A team of international geoscientists recently examined ‘Remnants of shifting early Cenozoic Pacific lower mantle flow imaged beneath the Philippine Sea Plate’,
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The Geological Society of America Graduate Student Research Grant program is now accepting applications for 2023 grants. Deadline: 2 Feb. 2023
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GSA Member John Flynn & an int'l team of scientists recently discovered the fossilized skull of a new species of giant river dolphin in Peru, Pebanista yacuruna, which fled the ocean into Amazonian rivers 16 Ma. Learn more @ScienceAdvances: #Paleontology
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Geoscientists from @EOS_SG, @USC_earth & @CornellEAS recently investigated the impact of the internal dynamics of the Himalayan orogenic wedge on the cycle of regional earthquakes, linking structural models with seismic cycle simulations to show how earthquake patterns may have
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NEW on our #SpeakingofGeoscience Blog 'Kīlauea: The #science behind the headlines' @Earth2larryo @USGSVolcanoes .Image: Moments after an earthquake, a collapse occurred in the crater of Pu’u ‘O’o, creating a robust, reddish-brown ash plume. Credit @USGS
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Researchers have proposed that the frequent occurrence of ~4.35-Ga ages among lunar rocks & a concurrent spike in zircon ages is indicative of a remelting event driven by the Moon’s orbital evolution rather than the original crystallization of the LMO:
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The sedimentary-stratigraphic record is the principal repository of empirical historic evidence for evolution and deep time environments. However, the record has a temporal incompleteness and inconsistency to its extensive quantity, driven by the spatial heterogeneity of
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The first ever Black in Geoscience Week starts today (Sunday 9/6) and runs through Saturday 9/12!.Follow @BlkinGeoscience and use hashtags #BlackInGeoscience and #BiGWeek. Join live events on Zoom or YouTube throughout the week - registration links:
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The Giant Geode of Pulpí.Featured paper #openaccess in #GEOLOGY: Photos by Hector Garrido.Video of the crystal cave:
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On #InternationalWomensDay, let’s recognize the outstanding work being done by @ESWNtweets! From GSA Memoir 214 'Women and Geology' - Building community to advance women in the #geosciences through the Earth Science Women’s Network
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“Field camp taught me that I am more capable than I thought. It’s the course that helped me solidify that I want to be a geologist.” Read about how Jessica Patrick’s field camp experience confirmed she was in the right field of study: #CommunityofSupport
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A new species of #pterosaur, Haliskia peterseni, was recently identified by a team of int'l researchers. With a wingspan of ~15ft (4.6m) it would have hunted throughout an inland sea ~100 million years ago when central western Queensland was underwater:
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According to the @USGS an M 4.8 earthquake occurred 6 km ESE of Califon, New Jersey this morning at a depth of 4.7 km. Earthquakes in the central & eastern U.S., although less frequent than in the western U.S., are typically felt over a much broader region. East of the Rockies,
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Chemo-mechanical fluid-rock interactions are critical in controlling the frictional-viscous transition in continental crust and the competition between seismic and aseismic deformation in fault zones. A team of geoscientists recently provided quantitative constraints on the
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Glacier Detachments: A New Hazard in a Warming World?.via @GeoTravelTerri Featured article from #GEOLOGY: @CUBoulder @CIRESnews @NatlParkService @WrangellStENPS
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A team of geoscientists recently synthesized structural, geochronological, thermochronological, sedimentological & petrological observations from MCCs distributed across the strike-length of the North American Cordillera: #Geology #Geoscience #GeologyRocks
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GSA recognizes Fellow Dr. Barbara P. Nash for contributions to the study of Earth through geochemical and mineralogical investigations of igneous rocks, correlation of volcanic tephra and obsidians, service to GSA, and advocacy for the LGBTQ+ community. #Pride #PrideInSTEM
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A team of researchers recently integrated thermal models of crustal-scale magmatism with thermo-mechanical simulations of ground deformation, offering valuable insights for magma dynamics. Learn more here: #Volcanology #MagmaDynamics #GeologyRocks
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GSA Member Donald Fisher @GeoscPSU & his co-author Greg Hirth @Brown_DEEPS recently had their work published @ScienceAdvances - A pressure solution flow law for the seismogenic zone: Application to Cascadia: #Geophysics #StructuralGeology #Tectonics
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The formation of cratons was a fundamental process on Earth during the Archean. Cratons are characterized by a stable lithosphere consisting of felsic continental crust overlying a lithospheric mantle. A team of researchers recently reconstructed the spatial and temporal
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A team of int'l scientists recently examined #Zircon microstructures at the West Clearwater Lake impact structure, Canada as a record of high temperature & pressure conditions during impact melt evolution. Learn more in Earth & Planetary Science Letters:
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Researchers recently used hundreds of fossils with direct evidence of feeding to compare trophic dynamics across five vertebrate assemblages that record the Triassic–Jurassic succession of the Polish Basin: #Paleontology #Dinosaurs #GeologyRocks
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Happy #EarthDay! .Enjoy a FREE download of our eBook ‘Geoscience for the Public Good and Global Development: Toward a Sustainable Future’ through Sunday in the GSA Store. .#geoscience #sustainability #EarthDay50
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Congratulations to the 2023 Randolph W. Bill & Cecile T. Bromery Awardee, Karen Chin, professor of geological sciences at @CUBoulder & Curator of Paleontology at the University of Colorado Museum of Natural History. Focused on paleoecology, Chin has a Ph.D. from @ucsantabarbara.
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Apply for J. David Lowell Field Camp Scholarships.These scholarships award up to $2,000 for undergraduate student members to attend the field camp of their choice. Deadline: 19 March .Apply Now!
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Geoscientists recently examined the paleolatitudes of 21 impact craters from an ∼40 m.y. period of enhanced impact cratering known as the Ordovician impact spike & found that all craters fall in an equatorial band at ≤30°: #Geoscience #GeologyRocks
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#Geoscientists recently integrated geological observations, statistical analysis, #geodynamic simulations & landscape-evolution models to develop a physical model that mechanistically links escarpments & plateaus to continental rifting. @Nature: #Geology
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#GSA2020 Deadline Extension .We have extended the deadline for uploading GSA 2020 Connects Online presentations to 7 October, 11:59 pm, EDT. Please see the Presenters Information page for basic instructions on how to record. 1/3
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.@AWG_org is accepting applications for its Geoscience Inclusion, Diversity, Equality, and Accessibility (IDEA) Scholarship, which supports undergraduate women from under-served communities. Deadline: 6/30/21
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HBD to Charles Darwin, born #OTD #onthisday in 1809. "I find in Geology a never-failing interest; as it has been remarked, it creates the same grand ideas respecting this world which Astronomy does for the Universe." -Letter to Charles Whitley, 1834 .Happy #DarwinDay!
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Happy #ValentinesDay from all of us at GSA! We ❤️our members! Image: Glomerocryst of plagioclase and pyroxene in a cordierite-bearing, 105 k.y. old dacite from Lipari (Aeolian Islands, Italy).Credit: @micROCKScopica
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.@aaberhe, GSA's 2019 Bromery Award recipient leads an internationally recognized program @ucmerced in soil biogeochemistry, advancing our understanding of organic matter accumulation, loss in soil environments, and soil carbon response. #BlackHistoryMonth
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A team of int'l researchers were recently able to identify segments of a major extinct Nile branch, ‘The Ahramat Branch’, running at the foothills of the Western Desert Plateau. Learn more @CommsEarth: #Sedimentology #Geology #EarthScience #GeologyRocks
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ICYMI on our #SpeakingofGeoscience Blog.'Kīlauea: The #science behind the headlines' Image: Moments after an earthquake, a collapse occurred in the crater of Pu’u ‘O’o, creating a robust, reddish-brown ash plume. Credit @USGS @USGSVolcanoes
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Geological Society of America Issues New Position Statement: Removing Barriers to Career Progression for Women in the Geosciences #GSA2018 Pardee Keynote Session:
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GSA Member Isabel Fendley recently worked with an int'l team of researchers to examine ‘Early Jurassic large igneous province carbon emissions constrained by sedimentary mercury.’ Their work was published @NatureGeosci -Learn more here: @OxUniEarthSci
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A team of int'l geoscientists recently combined deep seismic reflection data with legacy 2D surveys from offshore Morocco to present new evidence supporting a revised 3D passive-margin evolutionary model with a focus on the rift-to-drift transition phase:
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Reconstructing the Anak Krakatau flank collapse that caused the December 2018 Indonesian tsunami Featured article from #GEOLOGY:.Image: Rebecca Williams, et al.
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GSA student members: Registration for #GSA2020 Connects Online is now FREE for you, thanks to member generosity. Not a student member? Join now!
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Geology students at Western Colorado University recently uncovered a 90-million-year-old dinosaur trackway in Utah measuring 13 meters wide, more than 38 meters long and containing at least 104 distinct tracks. The tracks were first discovered by a retired geologist who sent a
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A team of scientists from @AWI_Media recently developed an Earth system model to determine Laurentide Ice Sheet growth preceding the Last Glacial Maximum. Learn more @NatureGeosci: #Paleoclimate #Glaciology #Geoscience #Geology #EarthScience #GeologyRocks
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ICYMI: In keeping w/ its ongoing commitment to ethics & inclusion, GSA Council approved a recommendation from the Committee on Diversity in the Geosciences to prohibit alcohol being served in the oral and poster session areas at all GSA meetings & events.
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Happy Valentine's Day from all of us at GSA! We ❤️ our members! .Image: Glomerocryst of plagioclase and pyroxene in a cordierite-bearing, 105 k.y. old dacite from Lipari (Aeolian Islands, Italy).Credit: @micROCKScopica
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According to a new study published in @NatureComms every 2.4 million years Mars’ gravitational pull is shifting Earth’s path around the sun, warming Earth’s climate & increasing deep ocean circulation. Learn more here: #Geophysics #Sedimentology #Mars
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If you question what lies beneath your feet - and what's at at the center of the Earth, you might be a geoscientist #ImAGeoscientist #EarthDay2018
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An int'l team of scientists analyzing olivine grains found in the 3.27-billion-year-old rocks of the Weltevreden Formation in the Barberton Greenstone Belt in Southern Africa have found evidence suggesting that plate tectonics was already ongoing on Earth at the time. The int'l
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If you don’t just love hiking mountains, but you think about how they were formed, you might be a geoscientist #ImAGeoscientist #EarthDay2018
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GSA Graduate Student Research Grants.Grants provide up to $2,500 to support master’s and doctoral thesis research in any branch of the geosciences. Application deadline: 3 February
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Submarine canyons transfer substantial amounts of sediment and organic carbon (OC) into the deep ocean, nourishing deep-sea ecosystems and contributing to the global carbon cycle through OC burial and sequestration. Tracking lateral OC transport through submarine canyon systems
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Researchers from @UniofOxford & @unibirmingham recently announced the discovery of a “dinosaur highway” that includes nearly 200 tracks dating back 166 million years. Learn more here: #Dinosaurs #Megalosaurus #Paleontology #GeologyRocks
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J. David Lowell Field Camp Scholarship.This award is for undergraduate students to attend summer field camp. Students will be awarded $2,000 each to attend the field camp of their choice based on diversity, economic/financial need & merit. Deadline: 3/19.
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It's time to celebrate #BlackInGeoscienceWeek!.Follow @BlkinGeoscience #BiGWeek2021 and #BlackInGeoscienceRollCall to keep up with events this week and to learn more about the amazing work being done by Black geoscientists!
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.@AWG_org is accepting applications for its Geoscience Inclusion, Diversity, Equality, and Accessibility (IDEA) Scholarship, which supports undergraduate women from under-served communities. Deadline: 6/30/21
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The theme for Day 3 of #BlackinGeoscienceWeek is Atmosphere! Follow @BlkinGeoscience.#BlackInAtmosphere.#BlackinClimate.#BlackMeteorologists .#BiGWeek and pre-register for events and panels:
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GSA stands with our African American colleagues and their families in facing injustice. We are committed to challenging and changing the biases that lead to discriminatory practices against people of color. Full statement: .#BlackLivesMatter #BlackinSTEM
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An int'l team recently combined high-resolution seismic reflection data with cored lithologies from @TheJR Expedition 398 to determine the submarine architecture & volcanic history of intra-caldera deposits from the Kameni Volcano. @NatureGeosci: .#IODP
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Over three million years ago, modern human ancestors were aware of different rock types, their mechanical properties & their distribution within natural landscapes. Geologically young volcanic rocks associated with the East African Rift System, when broken, yielded planar or
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The 2023 Penrose Conference held 4-10 June in Grand Coulee, WA was a huge success! The group shared research, stories and had a lot of fun in the field together. Photo credits: Bruce Bjornstad.Location: Credit: Bruce.Location: Ephrata Erratic Fan
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A team of geoscientists recently used a multiproxy & paleoclimate modeling approach to establish a unifying theory highlighting the susceptibility of the Pangean world to prolonged & intensified El Niño events leading to an extinction state: #GeologyRocks
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@txgeosciences @PennState @Yale Congratulations to Bromery Awardee, @HendrattaAli, @FortHaysState. Dr Ali co-created @BlkinGeoscience Week, led a petition for anti-racist action by the community, and co-created a plan for cultural transformation in geoscience organizations. #GSA2021
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The day of the total solar eclipse has arrived! Join @NASA for live views from across the path, expert commentary, live demos & more. Watch the live stream from 1:00 p.m. – 4:00 p.m. EDT here: #TotalEclipse2024 #TotalEclipse #Eclipse2024 #Eclipse
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GSA Publications Update.The April issue of #GEOLOGY is now available online: Cover: See #openaccess paper 'The role of megacontinents in the supercontinent cycle' by Wang et al. Photo by: Toshiaki Tsunogae and Xiaofang He
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Catastrophic Outburst Floods Carved Greenland’s “Grand Canyon” Featured paper in #GEOLOGY: Animation: Modelled outburst flood during a deglaciation scenario routed to the outlets of the NE Greenland ice stream. Credit: @palaeobak
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The J. David Lowell Field Camp Scholarship is GSA's annual award for undergraduate students to attend summer field camp. Students are awarded $2,000 each to attend the field camp of their choice based on diversity, financial need and merit. GSA partner Brunton will provide each
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An international team of geoscientists recently investigated the paleogeography of the Peri-Tethys region throughout Cenozoic time (66–0 Ma), including the West Siberian Seaway & quantified the influence of mantle convection & corresponding dynamic topography. Their study
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