Skip to content

Friday Field Foto #30: Cross section in a gravel quarry

September 21, 2007

A few years back, when I was doing my master’s in Colorado, we went to a gravel quarry for the clastic sedimentology class I was taking. They were quarrying very recent fluvial sediments laid down by the South Platte River, which provided some great cross-sectional views of the deposits.


Note the distinct surface separating the underlying red-brown sediments from the overlying, more buff-colored and much more poorly sorted sediments. The entire quarry was full of the deposits of sand-gravel bar formation indicative of a river with relatively flashy discharge.

I love being able to observe the products of very recent geologic processes. It helps make the all-important connection when observing the products of ancient processes.


No comments yet

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: