Friday, March 5, 2010

Zions National Park, Part 1

In June of 2004, I visited Zions National Park in southern Utah.  I took an incredible number of photographs, but at the time I did not know much about geology.  Thus features that now look obvious to me were not features at all.

As I look through my photos, I can spot faint sedimentary structures.  My camera at the time was 3.1 megapixels.  It certainly could not resolve fine details from afar; and that's all I have!

This first image has what appears to be planar laminations at the base of the formation.  I believe that I can discern some cross stratification above that.  If I had more time, I would trace them so that they are evident.  In my original photos they can be seen pretty easily but for personal reasons I prefer not distributing my master copies.

In the second image, I can barely make out more obvious signs of cross stratification at center left by the dark linear feature.  They're dipping to the right, so one might say that water was flowing in that direction.

In the next post, I'll actually annotate the features on a really nice photo!  It is a closer view of photo two on this post.

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