8 November 2019

Friday fold: Rist Canyon cobble

Posted by Callan Bentley

Reader Carl Brink from Colorado shares this image with us:

There’s a Friday fold hidden in there! Can you spot it?
(It’s the cobble in the exact center…)

Here it is:

This is the bed of Rist Creek Canyon in northern Colorado.

Carl writes,

The area I found the cobble in is mapped as Early Proterozoic quartzofeldspathic gneiss, often containing almandine garnet.

That is indeed what this appears to be; It’s a lovely sample of the local bedrock.
Nice find, Carl! Thanks for sharing.

Happy Friday, all!