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On OphiolitesSome friends of mine got it into their heads that they wanted to visit an ophiolite. As a reader of John McPhee's geology books, I thought "of course, what could be more distinctively Californian?" But as I researched and visited likely field sites and did some reading, the subject grew... |
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Peridotite: A New GalleryAfter a slow drive last month through the eastern Klamath Mountains, with many stops to take pictures and examine rocks, I now consider myself well acquainted with peridotite. That can be hard to do, because peridotite is almost all deep in the mantle and lower oceanic crust. And most of the peri... |
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Meet the ZeolitesZeolites are a group of a couple dozen different silicate minerals. A lot of people in the field will throw up their hands when they see particolored dots in basalt beds—"those are zeolites," they'll say. They mean one thing: low-temperature (that is, diagenetic) mineralization as... |
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Still Got That Old Wallpaper?Now that school is starting (or starting again), it's time to renew your look. Why not download some free, fresh images from my geological wallpaper gallery? All images in the gallery may be freely used for Computer desktops Presentation backgrounds Twitter backgrounds iPhone/iPod w... |
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Blogging from Antarctica, I HopeI have entered the "Blog Your Way to Antarctica" contest, in which the entrant with the most votes as of September 30 will be the designated blogger on a voyage to Antarctica next February. I hope you'll look at my candidate's entry here and vote for me afterwards. (Or just vote—I... |
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A Salute to the PlayaI don't know about your neighborhood, but at this time of year my local hipsters and art punks and young-at-heart people all hit the road for the Burning Man festival. It's held in the Nevada desert on a dry lake bed or playa (PLAH-yah)—an enormous flat natural stage where there are no seat... |
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