slgwv

slgwv

Posted on 08/21/2013


Photo taken on July 28, 2013



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California
USA
Sierra Nevada
Granite Lake trail
Blue Lakes area
erratic
glacial


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Split Glacial Erratic

Split Glacial Erratic
Been lying there since the glaciers retreated at the end of the Pleistocene, ca. 10K years ago, and is slowly breaking up in place. It's a piece of granite with iron-rich (mafic) inclusions, which are the dark spots weathering out. There are lots of erratics lying around all over this area.

Marco has particularly liked this photo


7 comments - The latest ones
afwrite
afwrite
Always thought-provoking these enormous rocks cracked open. Great capture.
3 years ago.
slgwv
slgwv
Thanks! I put an explanation in the caption. You should have lots of glacial erratics in Scotland, too!
3 years ago.
afwrite has replied to slgwv
I've seen a few, without knowing what they're called. Very photogenic.These things which have been subjected to violent destructive forces are left with a feeling of peace, serenity and contemplation. Cheers.
3 years ago.
Gloucester, a Bottled Spider
Gloucester, a Bottle…
I remember reading that, as a young man, Darwin was quite interested in finding a theory to explain what we now know glaciers were responsible for.
3 years ago.
slgwv
slgwv
Yeah, and once you get your eyeballs calibrated (as a prof of mine used to say) glacial features leap out at you everywhere.
3 years ago.
Pam J
Pam J
Re you comment above.. Yes !! They do.!!

Its an unconscious thing you just learn.. and know. The joy of beign a rockhound !!

Love Erratics.. the stories they could tell !

Admired in ~ I ♥ Nature
2 years ago.
slgwv has replied to Pam J
That's true!
2 years ago.