Tiny hoodoo erodes a hole where water drips off. Microcosm of the bigger geologic picture.
February 24, 2026 at 4:45 PM
Tiny hoodoo erodes a hole where water drips off. Microcosm of the bigger geologic picture.
Happy Geologic Map Day! The @cageosurvey.bsky.social
produces geologic maps at various scales & derivative maps showing important aspects of geologic hazards or resources. #EarthScienceWeek
produces geologic maps at various scales & derivative maps showing important aspects of geologic hazards or resources. #EarthScienceWeek
October 17, 2025 at 7:06 PM
Happy Geologic Map Day! The @cageosurvey.bsky.social
produces geologic maps at various scales & derivative maps showing important aspects of geologic hazards or resources. #EarthScienceWeek
produces geologic maps at various scales & derivative maps showing important aspects of geologic hazards or resources. #EarthScienceWeek
You want to see this new geologic map of the contiguous US that the USGS just released.
Cooperative National Geologic Map | NGMDB
Explore the Cooperative National Geologic Map, a unified view of our Nation's geology, with interactive layers and geologic data.
ngmdb.usgs.gov
August 28, 2025 at 3:48 PM
You want to see this new geologic map of the contiguous US that the USGS just released.
Geologic maps! Yay!! 🗺️
June 2, 2026 at 3:56 AM
Geologic maps! Yay!! 🗺️
![Comic: Typical Geologic core sample. [Cylindrical core sample with labels for difference sections from top to bottom] Topsoil, till, granite bedrock, bottomsoil, roof of subway car, floor of subway car, more granite, municipal water main [gouge in core sample], slightly different granite, piece of screaming spelunker’s forearm, cool crystals with no resale value, mangled fragments of drillbit from previous attempt, some boring intrusive rock that’s basically granite but has a name like “diorite” or “Andalite” that you always have to look up, netherrack, Balrog wing. [break between next chunk of core sample] Granite, topsoil, cement, floorboards, carpet, possessions of a confused and angry homeowner in the other hemisphere.](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:cz73r7iyiqn26upot4jtjdhk/bafkreicffnydtpbb2x24cfbblv2qtcwbr37zyw44vtqx47ocj2a26b2j2u)
November 25, 2025 at 10:35 PM
In geologic terms, "immediately" can mean a very long time.
“When I win, I will immediately bring prices down, starting on Day One.” abcnews.go.com/US/wireStory...
Beef prices have soared in the US
Anyone firing up the grill this summer already knows hamburgers and steaks are expensive, but the latest numbers show prices have climbed to record highs
abcnews.go.com
July 18, 2025 at 9:44 PM
In geologic terms, "immediately" can mean a very long time.
The Geologic Time Spiral, USGS, 2008. It’s sad that I don’t expect this to see this kind of work anymore.
March 16, 2026 at 10:01 PM
The Geologic Time Spiral, USGS, 2008. It’s sad that I don’t expect this to see this kind of work anymore.
They paved paradise,
Put up a parking lot.
Paradise said: That hurt, but let me tell you about geologic time
Put up a parking lot.
Paradise said: That hurt, but let me tell you about geologic time
June 22, 2025 at 1:12 PM
They paved paradise,
Put up a parking lot.
Paradise said: That hurt, but let me tell you about geologic time
Put up a parking lot.
Paradise said: That hurt, but let me tell you about geologic time
Geologic mapping of California continues with the Regional Geologic & Landslide Mapping Program. Maps include statewide geologic and fault activity maps, geologic atlas and regional geologic map series, and offshore continental margin maps. www.conservation.ca.gov/cgs/rgm/prog...
January 7, 2026 at 9:13 PM
Geologic mapping of California continues with the Regional Geologic & Landslide Mapping Program. Maps include statewide geologic and fault activity maps, geologic atlas and regional geologic map series, and offshore continental margin maps. www.conservation.ca.gov/cgs/rgm/prog...
There's a canyon in Arizona where light and rocks put on a unique geologic and geometric show: the Antelope Canyon.
April 29, 2026 at 4:27 PM
There's a canyon in Arizona where light and rocks put on a unique geologic and geometric show: the Antelope Canyon.
But in terms of geologic time, human-induced warming is extremely fast.
June 24, 2026 at 7:44 PM
But in terms of geologic time, human-induced warming is extremely fast.
Geologic Core Sample
xkcd.com
November 23, 2025 at 1:48 PM
NEW RELEASE! Sierra Nevada Earth Science Atlas
The Sierra Nevada Earth Science Atlas provides the most detailed geologic framework mapping of the Sierra Nevada that has ever been made.
www.conservation.ca.gov/cgs/sierra-n...
The Sierra Nevada Earth Science Atlas provides the most detailed geologic framework mapping of the Sierra Nevada that has ever been made.
www.conservation.ca.gov/cgs/sierra-n...
April 30, 2026 at 4:08 PM
NEW RELEASE! Sierra Nevada Earth Science Atlas
The Sierra Nevada Earth Science Atlas provides the most detailed geologic framework mapping of the Sierra Nevada that has ever been made.
www.conservation.ca.gov/cgs/sierra-n...
The Sierra Nevada Earth Science Atlas provides the most detailed geologic framework mapping of the Sierra Nevada that has ever been made.
www.conservation.ca.gov/cgs/sierra-n...
⚒️ Another good geologic xkcd (I chuckled at the Quarternary)!
Although there are some opportunities for expansion at the beginning and end.
Although there are some opportunities for expansion at the beginning and end.
Geologic Periods
xkcd.com
July 26, 2025 at 1:35 PM
⚒️ Another good geologic xkcd (I chuckled at the Quarternary)!
Although there are some opportunities for expansion at the beginning and end.
Although there are some opportunities for expansion at the beginning and end.
Geologic formations from the Ice Age in the Glacier National Park
#BlueSkyMonday #mountainMonday
#BlueSkyArtShow #GetOutside #Nature #NaturePhotography #PhotographersofBlueSky #SensoryArt
#BlueSkyMonday #mountainMonday
#BlueSkyArtShow #GetOutside #Nature #NaturePhotography #PhotographersofBlueSky #SensoryArt
June 30, 2025 at 2:08 PM
Geologic formations from the Ice Age in the Glacier National Park
#BlueSkyMonday #mountainMonday
#BlueSkyArtShow #GetOutside #Nature #NaturePhotography #PhotographersofBlueSky #SensoryArt
#BlueSkyMonday #mountainMonday
#BlueSkyArtShow #GetOutside #Nature #NaturePhotography #PhotographersofBlueSky #SensoryArt
Interviewer: Can you explain this gap in your resume?
Paleontologist: From the perspective of geologic time, there is no gap.
Paleontologist: From the perspective of geologic time, there is no gap.
Interviewer: Can you explain this gap in your resume?
Journalist: it's called an em dash.
Journalist: it's called an em dash.
December 21, 2024 at 4:04 PM
Interviewer: Can you explain this gap in your resume?
Paleontologist: From the perspective of geologic time, there is no gap.
Paleontologist: From the perspective of geologic time, there is no gap.
I use an equivalent for distributed systems: they're *all* eventually consistent at a geologic time scale.
July 20, 2025 at 4:14 PM
I use an equivalent for distributed systems: they're *all* eventually consistent at a geologic time scale.
March 23, 2026 at 1:15 PM
Bilal Haq is, personally, the reason we understand sea level change over geologic time.
There is a foraminifera sculpture park in Zhongshan, Guangdong, the outcome of the vision of Pakistani-American marine geologist Bilal Haq and Chinese marine biologist Zheng Shouyi, honestly there should be more in more cities
September 21, 2026 at 5:53 PM
Bilal Haq is, personally, the reason we understand sea level change over geologic time.
morning time: fleeting as a hummingbird's whisper
afternoon time: best measured in geologic terms
afternoon time: best measured in geologic terms
September 15, 2025 at 4:21 PM
morning time: fleeting as a hummingbird's whisper
afternoon time: best measured in geologic terms
afternoon time: best measured in geologic terms
Mancos Shale Formations
Highway 24
Hanksville, Utah
January 2026
The Mancos Shale is a major Late Cretaceous (approximately 95–80 Ma) geologic formation in the western United States.
#utah #landscape #desert #photography
Highway 24
Hanksville, Utah
January 2026
The Mancos Shale is a major Late Cretaceous (approximately 95–80 Ma) geologic formation in the western United States.
#utah #landscape #desert #photography
February 17, 2026 at 4:13 PM
Mancos Shale Formations
Highway 24
Hanksville, Utah
January 2026
The Mancos Shale is a major Late Cretaceous (approximately 95–80 Ma) geologic formation in the western United States.
#utah #landscape #desert #photography
Highway 24
Hanksville, Utah
January 2026
The Mancos Shale is a major Late Cretaceous (approximately 95–80 Ma) geologic formation in the western United States.
#utah #landscape #desert #photography
Are you traveling over the holiday weekend?
Be sure to check out some of California’s “Geo Gems” - notable geologic features in California state parks. These geologic wonders illustrate the legacy and continuing geologic evolution of California.
www.parks.ca.gov?page_id=29631
Be sure to check out some of California’s “Geo Gems” - notable geologic features in California state parks. These geologic wonders illustrate the legacy and continuing geologic evolution of California.
www.parks.ca.gov?page_id=29631
November 26, 2025 at 8:08 PM
Are you traveling over the holiday weekend?
Be sure to check out some of California’s “Geo Gems” - notable geologic features in California state parks. These geologic wonders illustrate the legacy and continuing geologic evolution of California.
www.parks.ca.gov?page_id=29631
Be sure to check out some of California’s “Geo Gems” - notable geologic features in California state parks. These geologic wonders illustrate the legacy and continuing geologic evolution of California.
www.parks.ca.gov?page_id=29631
FOIA is also helpful for teaching patience on a geologic time scale.
happy sunshine week! go file an open records request. you do not have to be a journalist to do it and i highly recommend that everyone file at least one at some point and learn about how your government (federal, state, local, all of the above) works!
March 16, 2026 at 9:51 PM
FOIA is also helpful for teaching patience on a geologic time scale.
I could watch them for ages. Like, geologic ages.
December 18, 2025 at 2:39 PM
I could watch them for ages. Like, geologic ages.
To put it in geologic terms, I’m at about a 10 on the Mohs Hardness Scale rn
April 2, 2026 at 3:24 PM
To put it in geologic terms, I’m at about a 10 on the Mohs Hardness Scale rn