yesterday- you can see a set of joints or very small faults dipping to the right at about 25 degrees. These fractures cut across the pebbles they intersect, which is the defining characteristic of a cracked pebble conglomerate. Now if they were really joints, I'd expect them to be caused by tensional stress, which I think is unlikely in this setting. Furthermore, it seems likely that the fractures would have followed the pebble edges rather than plowing through them. On the other hand, looking carefully at full resolution, I can't make out any offset. So while I suspect these were caused by shearing, it's not observable macroscopically. Below are a couple of crops (run through autolevel routine in Paint.net to bring out details) highlighting said fractures.
Photo unmodified. May 7, 2013. FlashEarth location.
Is This Your Hat?
2 years ago