Day #97 Deskcrop: Conglomerate with Slickensides

Today’s deskcrop comes from the Cedar Mountain area of the northern San Rafael Swell in Utah. This rock is from a thin unit that is found at the contact between the Jurassic Entrada and Summerville (Curtis) formations. The conglomerate contains a variety of pebble types including limeclasts, suggesting an arid depositional environment. This particular piece also has some nice slickensides developed on one side (below). I’ll follow up with some more slickensided deskcrops over the next couple of days.


… with Slickensides

Explore this and all of my 2010 Deskcrops and Outcrops in Google Earth!