You are browsing the archive for March 2023 - Mountain Beltway.

26 March 2023

Bird update March 2023

Click to enlarge I’m still birding voraciously. I’m up to 89 species in my county for the year. So that means I added a dozen since last month. A few of those are freshly-arrived migrants from southerly climes, and some are just me putting in the time to go rack up waterfowl at nearby lakes. I’ve maintained my high county ranking, which has oscillated between #4 and #2 this month. …


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17 March 2023

Friday fold: Pinto Gneiss, varnished and un-

Last week, I was lucky enough to visit Pushawalla Canyon in the Indio Hills region of southern California. There, my colleague Kim Blisniuk (San Jose State University) led our students through an exercise mapping alluvial deposits as a way of constraining offsets along the Mission Canyon strand of the San Andreas Fault. I noted that much of the alluvium was sourced to the northeast, to the Little San Bernardino Mountains. …


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10 March 2023

Friday fold: Painted Canyon

Greetings from southern California! I’m running a spring break field course in the Mojave and Colorado desert. Here’s a pretty amazing fold pair in Palm Springs Formation, butted up against (darker) Mecca Formation along a fault. This is in Painted Canyon, in the Mecca Hills, a transpressional pop-up between the Painted Canyon Fault and the San Andreas Fault. Happy Friday!


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