Australian shepherd for scale...
End of Slot Canyon
Unnamed
Tuff
The Pulpit
San Andreas Rift Zone
Tree trunk mold
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Elephant Head Rock
Elephant Head Rock
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Breakout!
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(Flooded) Perched Playa
They went thataway!
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190 visits
Measles boulder?
Well, no. ;) It's not even a conglomerate, altho it looks like one! It's mostly granite, with the large round things weathering out being pods of more iron-rich rock. "Mafic inclusions", in the jargon. Their composition is basaltic, and it's now thought these could reflect "liquid immiscibility"--like oil and water, the granite magma and the basaltic magma didn't mix, with the basaltic liquid forming large "drops." The boulder itself is a glacial erratic. Sierra Nevada, California, USA, near the Blue Lakes.
, Gudrun, tiabunna, William Sutherland have particularly liked this photo
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