Post your folds, faults and fossils

[austin granger]

Some more geology, this one on a slightly larger scale.

[austin granger]

OK, last one I promise.

Sculptured Beach, Point Reyes

[Brad Rippe]

Keep those coming Austin! Here's some glacial polish in the High Sierra near Yosemite.

[D-tach]

[QUOTE=austin granger;728526]OK, last one I promise.

Sculptured Beach, Point Reyes

Niiiiiice!!

[mrladewig]

capitol reef

4X5 E100G, 150 Symmar-S

[NoBob]

Cliff, Wildcat Beach, Point Reyes

Looking at the right of the picture, from bottom to top, the layers appear to have a steep dip. On the left of the picture, the layers seem to be dipping in a different direction. Looks like the formation's twisted and something has weathered away the middle of it to create that large hole...

And then there's that rock at the bottom. That's an abrupt change between the folded layers and that rock with its flat layers.

[NoBob]

Any idea when Capitol Reef dates from?

[Kirk Keyes]

Any idea when Capitol Reef dates from?

The Castle at Capitol Reef is Wingate Sandstone - about 200 million years old.
http://en.wikipedia.org/wiki/Wingate_Sandstone

[Heroique]

The Castle at Capitol Reef is Wingate Sandstone - about 200 million years old.

That’s a fairly short amount of time.

Only four or five percent of the earth’s age.

The sculpted shape – its castle-like appearance – is even more youthful.

[h2oman]

Weathered granite from the South Platte River area in Colorado. I believe it is the Pike's Peak formation, but Mel (mrladewig) might correct me on that.

The granite is an intrusive rock, created when magam forces its way upward, but remains underground as the magma cools. As overlying rock is removed, pressure is released and cracks form. Water enters the cracks and erodes along them, forming blocks and boulders that are interlocking, in a sense, like those in the photograph. Or so the theory goes...