Differential weathering of limestone and chert, San Rafael Valley, Utah


I collected this in the mid-1990s on the San Rafael Swell in southern Utah, within the Colorado Plateau.  I like the contrasts, in resistance, texture, and hue.  I like the fact that it is a miniature example of erosion of landscapes.  I have found that this rock particularly grabs the attention of non-geologists.

Age & Formation
Jurassic Carmel Formation, ~170 Ma.
carmel.mov1.28 MB