sandstone – Irreverent Outcrop https://irreverentoutcrop.com Travel stories with mild geo-flavor Mon, 30 Jun 2025 20:57:47 +0000 en-US hourly 1 https://wordpress.org/?v=6.8.1 https://irreverentoutcrop.com/wp-content/uploads/2024/06/cropped-logo-temp-01-1-2-32x32.png sandstone – Irreverent Outcrop https://irreverentoutcrop.com 32 32 Devil’s Punchbowl: sandstone formations warped by San Andreas Fault https://irreverentoutcrop.com/devils-punchbowl/ https://irreverentoutcrop.com/devils-punchbowl/#respond Sun, 29 Jun 2025 08:54:59 +0000 https://irreverentoutcrop.com/?p=1292 Read more]]> North of Los Angeles lies a striking sandstone outcrop known as the Devil’s Punchbowl. I’d seen it before from the air— it’s right where the Transverse Ranges of Southern California give way to the Mojave Desert, directly adjacent to the San Andreas Fault. But it was not until this year that I finally had a chance to visit. The area’s sedimentation dates back to…

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]]> https://irreverentoutcrop.com/devils-punchbowl/feed/ 0 Time-traveling through 1.7 billion years of geology at the Grand Canyon https://irreverentoutcrop.com/geology-at-the-grand-canyon-en/ https://irreverentoutcrop.com/geology-at-the-grand-canyon-en/#respond Mon, 30 Dec 2024 11:59:11 +0000 https://irreverentoutcrop.com/?p=1020 Read more]]> We visited the Grand Canyon in Arizona this spring and hiked all the way to the bottom! Starting with the Kaibab Formation at the top, which formed around 270 million years ago during the Permian period, and moving down to the Vishnu Schist at the canyon floor, which formed 1.7 billion years ago during the Proterozoic Eon, we explored the entire geological timeline in reverse.

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