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Oakland Geology
The Oakland geologic map doesn’t show a strike-and-dip symbol here, so maybe I can add a data point to the big picture. Geologists prefer to make many ...
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Rockridge Shopping Center quarry « Oakland Geology
10 Responses to “Rockridge Shopping Center quarry”. Ken Clark Says: 15 March 2008 at 11:48 am. I pulled up your pic of that gloryhole, ...
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Rockridge Shopping Center quarry « Oakland Geology
10 Responses to “Rockridge Shopping Center quarry”. Ken Clark Says: 15 March 2008 at 11:48 am. I pulled up your pic of that gloryhole, ...
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Shale concretion « Oakland Geology
But I kept looking and eventually spotted a dark pod of rock—a concretion. I banged it open and this is what I saw. ...
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Protect our City from waste « Oakland Geology
Protect our City from waste. By Andrew. waste. I’m not trying to single out one person — you can tell because this flyer is from an earlier ...
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Cactus Rock « Oakland Geology
(click it for full size) This appears to be Cactus Rock, attested to in old postcards about the ongoing development of this streetcar suburb ...
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Rockridge Shopping Center quarry « Oakland Geology
I’m standing at the very edge of the Catholic cemetery overlooking the Rockridge Shopping Center. Beyond it is a remnant of the original ...
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puzzles « Oakland Geology
One of the geologic puzzles I worked on during 2008 was the identity of “Rockridge Rock.” One candidate is a crag along Acacia Avenue once known as Cactus ...
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Basalt of Sibley Volcano « Oakland Geology
As far as I know, the late Miocene volcano preserved at Sibley Volcanic Reserve doesn’t have a name, so no one will mind if I dub it Sibley Volcano. ...
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Conglomerate in Claremont Canyon « Oakland Geology
On my same hike up Claremont Canyon I passed excellent outcrops of the Orinda Formation. This is a sequence of coarse-grained, fluvial gravel that dates ...
