slgwv

slgwv

Posted on 08/21/2013


Photo taken on July 28, 2013



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Keywords

California
USA
Sierra Nevada
Granite Lake trail
Blue Lakes area
granitic magma
basaltic magma
mafic inclusions
measles rock
liquid immiscibility
geology
igneous
erratic


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Measles boulder?

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.

Les's Photography AKA aligeeach, Gudrun, tiabunna, William Sutherland have particularly liked this photo


9 comments - The latest ones
William Sutherland
William Sutherland
Terrific capture!

Admired in:
www.ipernity.com/group/tolerance
2 years ago.
Pam J
Pam J
I am drooling.... unseemly I know... but cant help it !!!!!!!!

Admired in ~ I ♥ Nature
2 years ago.
tiabunna
tiabunna
Quite fascinating. Well found and taken.
2 years ago.
slgwv
slgwv
Thanks, everyone!
2 years ago.
Gloucester, a Bottled Spider
Gloucester, a Bottle…
Never saw one of these before. If I had it would have puzzled me. Thanks for the info on it.
2 years ago.
slgwv
slgwv
Glad you found it of interest!
2 years ago.
Gudrun
Gudrun
That's a weird looking and very interesting rock!
2 years ago.
slgwv
slgwv
Indeed--and I had the camera! ;)
2 years ago.
slgwv
slgwv
Thanks, Les!
2 years ago.