Analyses of the Jezero crater Margin unit from Perseverance’s SuperCam identify multiple episodes of aqueous alteration driven by early carbon-rich fluids, paleolake/groundwater interaction, and late-stage hydrothermal activity, according to a paper in Communications Earth & Environment. 🔭🧪
Lake- and groundwater-associated alteration of the olivine-rich Margin unit in Jezero crater, Mars - Communications Earth & Environment
Textural, mineralogical, and chemical analyses of the Jezero crater Margin unit from Perseverance’s SuperCam identify multiple episodes of aqueous alteration driven by early carbon-rich fluids, paleolake/groundwater interaction, and late-stage hydrothermal activity.
go.nature.com
September 27, 2026 at 4:09 PM
Analyses of the Jezero crater Margin unit from Perseverance’s SuperCam identify multiple episodes of aqueous alteration driven by early carbon-rich fluids, paleolake/groundwater interaction, and late-stage hydrothermal activity, according to a paper in Communications Earth & Environment. 🔭🧪
Paleolake geochronology supports Last Glacial Maximum (LGM) age for human tracks at White Sands, New Mexico | Science Advances www.science.org/doi/10.1126/...
Paleolake geochronology supports Last Glacial Maximum (LGM) age for human tracks at White Sands, New Mexico
Additional data from an adjacent ancient lake support a 23,000-year-old age for human tracks in New Mexico.
www.science.org
June 19, 2025 at 9:24 AM
Paleolake geochronology supports Last Glacial Maximum (LGM) age for human tracks at White Sands, New Mexico | Science Advances www.science.org/doi/10.1126/...
Human footprints provide snapshot of last interglacial ecology in the Arabian interior🏺🧪
Mathew Stewart, @huwgroucutt.bsky.social , @mdpetraglia.bsky.social et al
www.science.org/doi/10.1126/...
Evidence indicates a well-watered semi-arid grassland setting during human movements into Nefud Desert.
Mathew Stewart, @huwgroucutt.bsky.social , @mdpetraglia.bsky.social et al
www.science.org/doi/10.1126/...
Evidence indicates a well-watered semi-arid grassland setting during human movements into Nefud Desert.
August 8, 2025 at 3:02 PM
Human footprints provide snapshot of last interglacial ecology in the Arabian interior🏺🧪
Mathew Stewart, @huwgroucutt.bsky.social , @mdpetraglia.bsky.social et al
www.science.org/doi/10.1126/...
Evidence indicates a well-watered semi-arid grassland setting during human movements into Nefud Desert.
Mathew Stewart, @huwgroucutt.bsky.social , @mdpetraglia.bsky.social et al
www.science.org/doi/10.1126/...
Evidence indicates a well-watered semi-arid grassland setting during human movements into Nefud Desert.
“Two iconic features of southwestern USA geology are linked by our hypothesis that the … Meteor Crater impact in northern Arizona triggered cliff collapse in Grand Canyon 56,000 years ago…” 🧪🔭☄️
eos.org/articles/an-...
eos.org/articles/an-...
An Asteroid Impact May Have Led to Flooding near the Grand Canyon - Eos
There’s remarkable synchronicity between the timing of a paleolake in what is today Grand Canyon National Park and the formation of nearby Barringer Meteorite Crater.
eos.org
November 2, 2025 at 2:34 AM
“Two iconic features of southwestern USA geology are linked by our hypothesis that the … Meteor Crater impact in northern Arizona triggered cliff collapse in Grand Canyon 56,000 years ago…” 🧪🔭☄️
eos.org/articles/an-...
eos.org/articles/an-...
Fun bit of geochronology detective work, hypothesizing that the Meteor Crater Impact (Arizona) caused a landslide and paleolake formation in the Grand Canyon, and it all started with the discovery of driftwood in Stanton’s Cave in the 1980s pubs.geoscienceworld.org/gsa/geology/...
Grand Canyon landslide-dam and paleolake triggered by the Meteor Crater impact at 56 ka | Geology | GeoScienceWorld
pubs.geoscienceworld.org
July 15, 2025 at 5:55 PM
Fun bit of geochronology detective work, hypothesizing that the Meteor Crater Impact (Arizona) caused a landslide and paleolake formation in the Grand Canyon, and it all started with the discovery of driftwood in Stanton’s Cave in the 1980s pubs.geoscienceworld.org/gsa/geology/...
Paleolake geochronology supports Last Glacial Maximum (LGM) age for human tracks at White Sands, New Mexico 🏺
Paleolake geochronology supports Last Glacial Maximum (LGM) age for human tracks at White Sands, New Mexico
Additional data from an adjacent ancient lake support a 23,000-year-old age for human tracks in New Mexico.
www.science.org
June 19, 2025 at 12:48 PM
Paleolake geochronology supports Last Glacial Maximum (LGM) age for human tracks at White Sands, New Mexico 🏺
Premium subscribers to my Bad Astronomy Newsletter can read today about how an asteroid impact 56,000 years ago may have triggered a landslide in the Grand Canyon and created a massive paleolake. Also, Arctic sea ice is at (another) record low.
badastronomy.beehiiv.com/p/did-an-ast...
🧪
badastronomy.beehiiv.com/p/did-an-ast...
🧪
Did an asteroid impact dam up the Grand Canyon 56,000 years ago?
The Meteor Crater asteroid impact may have created an ancient lake. Also, Arctic sea ice again way too low
badastronomy.beehiiv.com
July 17, 2025 at 2:31 PM
Premium subscribers to my Bad Astronomy Newsletter can read today about how an asteroid impact 56,000 years ago may have triggered a landslide in the Grand Canyon and created a massive paleolake. Also, Arctic sea ice is at (another) record low.
badastronomy.beehiiv.com/p/did-an-ast...
🧪
badastronomy.beehiiv.com/p/did-an-ast...
🧪
New data/study on the White Sands footprints.
Paleolake geochronology supports Last Glacial Maximum (LGM) age for human tracks at White Sands, New Mexico www.science.org/doi/10.1126/... || #archaeology
Paleolake geochronology supports Last Glacial Maximum (LGM) age for human tracks at White Sands, New Mexico www.science.org/doi/10.1126/... || #archaeology
Paleolake geochronology supports Last Glacial Maximum (LGM) age for human tracks at White Sands, New Mexico
Additional data from an adjacent ancient lake support a 23,000-year-old age for human tracks in New Mexico.
www.science.org
June 23, 2025 at 4:59 PM
New data/study on the White Sands footprints.
Paleolake geochronology supports Last Glacial Maximum (LGM) age for human tracks at White Sands, New Mexico www.science.org/doi/10.1126/... || #archaeology
Paleolake geochronology supports Last Glacial Maximum (LGM) age for human tracks at White Sands, New Mexico www.science.org/doi/10.1126/... || #archaeology
UNM researchers link a major landslide in the Grand Canyon 56,000 years ago to the Meteor Crater impact. Shockwaves likely triggered cliff collapse, damming the river and creating a temporary paleolake.
⚒️☄️🧪
#GrandCanyon
#MeteorImpact
#EarthHistory
Source
news.unm.edu/news/unm-stu...
⚒️☄️🧪
#GrandCanyon
#MeteorImpact
#EarthHistory
Source
news.unm.edu/news/unm-stu...
Giant meteor impact may have triggered massive Grand Canyon landslide 56,000 years ago
Researchers have found a link between two geological events in iconic locations of the U.S. Southwest that scientists previously didn't think had anything to do with each other.
www.livescience.com
July 17, 2025 at 7:20 PM
UNM researchers link a major landslide in the Grand Canyon 56,000 years ago to the Meteor Crater impact. Shockwaves likely triggered cliff collapse, damming the river and creating a temporary paleolake.
⚒️☄️🧪
#GrandCanyon
#MeteorImpact
#EarthHistory
Source
news.unm.edu/news/unm-stu...
⚒️☄️🧪
#GrandCanyon
#MeteorImpact
#EarthHistory
Source
news.unm.edu/news/unm-stu...
3/ At 300 km southeast of Amman, in the Khashabiyeh paleolake, a Franco-Jordanian team discovered eight kites forming a 17 km chain. Excavations (2013-2021) revealed charcoal dated to 7000 BCE (Pre-Pottery Neolithic B period).
December 9, 2025 at 11:46 AM
3/ At 300 km southeast of Amman, in the Khashabiyeh paleolake, a Franco-Jordanian team discovered eight kites forming a 17 km chain. Excavations (2013-2021) revealed charcoal dated to 7000 BCE (Pre-Pottery Neolithic B period).
CONFIRMED: Discovery of human footprints in alluvium dated to the Last Glacial Maximum (LGM) at White Sands, New Mexico…spans >23.6 thousand years to ~17.0 thousand calibrated years before present, providing another line of evidence further supporting the validity of an LGM age for the tracks.
Paleolake geochronology supports Last Glacial Maximum (LGM) age for human tracks at White Sands, New Mexico
Additional data from an adjacent ancient lake support a 23,000-year-old age for human tracks in New Mexico.
www.science.org
June 19, 2025 at 2:26 AM
CONFIRMED: Discovery of human footprints in alluvium dated to the Last Glacial Maximum (LGM) at White Sands, New Mexico…spans >23.6 thousand years to ~17.0 thousand calibrated years before present, providing another line of evidence further supporting the validity of an LGM age for the tracks.
Paleolake geochronology supports Last Glacial Maximum (LGM) age for human tracks at White Sands, New Mexico | Science Advances www.science.org/doi/10.1126/...
Paleolake geochronology supports Last Glacial Maximum (LGM) age for human tracks at White Sands, New Mexico
Additional data from an adjacent ancient lake support a 23,000-year-old age for human tracks in New Mexico.
www.science.org
June 22, 2025 at 11:29 AM
Paleolake geochronology supports Last Glacial Maximum (LGM) age for human tracks at White Sands, New Mexico | Science Advances www.science.org/doi/10.1126/...
New research in #ScienceAdvances confirms the hotly contested age of fossilized human tracks found in White Sands National Park, New Mexico.
Stratigraphic records corroborate that the footprints range from 21,000 to 23,000 years old, dating to the Last Glacial Maximum. scim.ag/4lnt5CM
Stratigraphic records corroborate that the footprints range from 21,000 to 23,000 years old, dating to the Last Glacial Maximum. scim.ag/4lnt5CM
Paleolake geochronology supports Last Glacial Maximum (LGM) age for human tracks at White Sands, New Mexico
Additional data from an adjacent ancient lake support a 23,000-year-old age for human tracks in New Mexico.
scim.ag
June 23, 2025 at 8:29 PM
New research in #ScienceAdvances confirms the hotly contested age of fossilized human tracks found in White Sands National Park, New Mexico.
Stratigraphic records corroborate that the footprints range from 21,000 to 23,000 years old, dating to the Last Glacial Maximum. scim.ag/4lnt5CM
Stratigraphic records corroborate that the footprints range from 21,000 to 23,000 years old, dating to the Last Glacial Maximum. scim.ag/4lnt5CM
#GrandCanyon #Landslide #Dam & #Paleolake Triggered By The #Meteor #Crater Impact At 56 Ka
-
doi.org/10.1130/G535...
-
#geology #water #hydrology #massmovement #Nankoweap #ColoradoRiver #earthquake #seismic #dating #radiocarbon #Pleistocene #sediments #elevation #geomorphology #geomorphometry
-
doi.org/10.1130/G535...
-
#geology #water #hydrology #massmovement #Nankoweap #ColoradoRiver #earthquake #seismic #dating #radiocarbon #Pleistocene #sediments #elevation #geomorphology #geomorphometry
September 5, 2025 at 12:01 AM
Massive Ice Sheet Basal Melting Triggered by Atmospheric Collapse on Mars, Leading to Formation of an Overtopped, Ice-Covered Argyre Basin Paleolake Fed by 1,000-km Rivers
#PlanetaryScience
agupubs.onlinelibrary.wiley.com/doi/10.1029/...
#PlanetaryScience
agupubs.onlinelibrary.wiley.com/doi/10.1029/...
Massive Ice Sheet Basal Melting Triggered by Atmospheric Collapse on Mars, Leading to Formation of an Overtopped, Ice‐Covered Argyre Basin Paleolake Fed by 1,000‐km Rivers
Collapsing Mars' atmosphere onto an ice sheet ∼3.6 billion years ago can melt and liberate about half of Mars' water inventory
Meltwater feeds an ice-covered fluviolacustrine system with 1,000s-k...
agupubs.onlinelibrary.wiley.com
November 4, 2024 at 10:21 PM
Massive Ice Sheet Basal Melting Triggered by Atmospheric Collapse on Mars, Leading to Formation of an Overtopped, Ice-Covered Argyre Basin Paleolake Fed by 1,000-km Rivers
#PlanetaryScience
agupubs.onlinelibrary.wiley.com/doi/10.1029/...
#PlanetaryScience
agupubs.onlinelibrary.wiley.com/doi/10.1029/...
Another magungous (and unexpected) haboob is heading southwards through Chihuahua. As seen on satellite, the dust loading really thickened as the outrushing winds hit the highly erodible Paleolake Palomas sediments.
Attn @wisc-satellite.bsky.social @sangasso.bsky.social @aerosolwatch.bsky.social
Attn @wisc-satellite.bsky.social @sangasso.bsky.social @aerosolwatch.bsky.social
May 6, 2025 at 12:09 AM
Another magungous (and unexpected) haboob is heading southwards through Chihuahua. As seen on satellite, the dust loading really thickened as the outrushing winds hit the highly erodible Paleolake Palomas sediments.
Attn @wisc-satellite.bsky.social @sangasso.bsky.social @aerosolwatch.bsky.social
Attn @wisc-satellite.bsky.social @sangasso.bsky.social @aerosolwatch.bsky.social
Amazing view from a paleolake in the Rub al Khali 🥰
January 9, 2024 at 7:50 PM
Amazing view from a paleolake in the Rub al Khali 🥰
Like, were the Martian river valleys and canyons carved out in brief hothouse episodes between long ice ages, or under a steady-state hydrogen greenhouse? If the latter, how come Gale Crater's sediments imply that the paleolake that stood there in ancient time may have had oxygenated waters?
May 27, 2025 at 12:48 AM
Like, were the Martian river valleys and canyons carved out in brief hothouse episodes between long ice ages, or under a steady-state hydrogen greenhouse? If the latter, how come Gale Crater's sediments imply that the paleolake that stood there in ancient time may have had oxygenated waters?
Lake Bonneville feld trip stop, GK Gilbert's Old River Bed section, south of Tooele, Utah. October, late 1990s.
August 7, 2025 at 4:12 AM
Lake Bonneville feld trip stop, GK Gilbert's Old River Bed section, south of Tooele, Utah. October, late 1990s.
Grand Canyon landslide-dam and paleolake triggered by the Meteor Crater impact at 56 ka: pubs.geoscienceworld.org/gsa/geology/... -> An Asteroid Impact May Have Led to Flooding near the Grand Canyon: eos.org/articles/an-...
Grand Canyon landslide-dam and paleolake triggered by the Meteor Crater impact at 56 ka | Geology | GeoScienceWorld
pubs.geoscienceworld.org
November 1, 2025 at 6:36 PM
Grand Canyon landslide-dam and paleolake triggered by the Meteor Crater impact at 56 ka: pubs.geoscienceworld.org/gsa/geology/... -> An Asteroid Impact May Have Led to Flooding near the Grand Canyon: eos.org/articles/an-...
Humans have been in North America for at least 23,000 yrs, probably much longer (as indigenous folk have told us all along).
The “USA” has existed for < 1 % of the time humans have been here. So let’s stop acting like we own the place. How about some humility?
🧪
www.science.org/doi/10.1126/...
The “USA” has existed for < 1 % of the time humans have been here. So let’s stop acting like we own the place. How about some humility?
🧪
www.science.org/doi/10.1126/...
Paleolake geochronology supports Last Glacial Maximum (LGM) age for human tracks at White Sands, New Mexico
Additional data from an adjacent ancient lake support a 23,000-year-old age for human tracks in New Mexico.
www.science.org
June 23, 2025 at 12:41 PM
Humans have been in North America for at least 23,000 yrs, probably much longer (as indigenous folk have told us all along).
The “USA” has existed for < 1 % of the time humans have been here. So let’s stop acting like we own the place. How about some humility?
🧪
www.science.org/doi/10.1126/...
The “USA” has existed for < 1 % of the time humans have been here. So let’s stop acting like we own the place. How about some humility?
🧪
www.science.org/doi/10.1126/...
When it comes to famous holes in the ground, northern Arizona has two: the #GrandCanyon and #MeteorCrater. New research suggests that these famous depressions might, in fact, be linked.
An Asteroid Impact May Have Led to Flooding near the Grand Canyon - Eos
There’s remarkable synchronicity between the timing of a paleolake in what is today Grand Canyon National Park and the formation of nearby Barringer Meteorite Crater.
eos.org
October 25, 2025 at 6:23 PM
When it comes to famous holes in the ground, northern Arizona has two: the #GrandCanyon and #MeteorCrater. New research suggests that these famous depressions might, in fact, be linked.
Meteor Crash May Have Caused an Ancient Lake to Form in the Grand Canyon
Meteor Crash May Have Caused an Ancient Lake to Form in the Grand Canyon
Learn more about the Meteor Crater near the Grand Canyon and how it may have created a paleolake thousands of years ago.
www.discovermagazine.com
July 22, 2025 at 2:31 PM
Meteor Crash May Have Caused an Ancient Lake to Form in the Grand Canyon
...and the research article is open access here:
Paleolake geochronology supports Last Glacial Maximum (LGM) age for human tracks at White Sands, New Mexico
doi.org/10.1126/sciadv.adv4951
Paleolake geochronology supports Last Glacial Maximum (LGM) age for human tracks at White Sands, New Mexico
doi.org/10.1126/sciadv.adv4951
Paleolake geochronology supports Last Glacial Maximum (LGM) age for human tracks at White Sands, New Mexico
Additional data from an adjacent ancient lake support a 23,000-year-old age for human tracks in New Mexico.
doi.org
June 19, 2025 at 9:02 PM
...and the research article is open access here:
Paleolake geochronology supports Last Glacial Maximum (LGM) age for human tracks at White Sands, New Mexico
doi.org/10.1126/sciadv.adv4951
Paleolake geochronology supports Last Glacial Maximum (LGM) age for human tracks at White Sands, New Mexico
doi.org/10.1126/sciadv.adv4951
Lake Bonneville shorelines on a fan and higher on the slopes of the Oquirrh Mountains, near Stockton, Utah. Field trip on the way home from a GSA meeting, November, 2000.
September 6, 2023 at 11:12 PM
Lake Bonneville shorelines on a fan and higher on the slopes of the Oquirrh Mountains, near Stockton, Utah. Field trip on the way home from a GSA meeting, November, 2000.