Dolomites, Early Ordovician
Dolomites from the Arbuckle Group from the deep subsurface in Kansas
- Formation: Early Ordovician Arbuckle Group at depth > 4,000 feet.
- Scale: The long dimension of the image is 5 cm.
- Photo attribution: Brad King and Wayne Dickerson of the University of Kansas at the Kansas Geological Survey's Digital Cathodoluminescence Imaging Laboratory.
- Blue specks: These are small air bubbles that were trapped in a blue-dyed impregnating epoxy resin. The bubbles are now partly filled with aluminum oxide polishing paste — white in reflected light, but with blue CL luminescence.
(Photo set and description provided by Dr. Greg Ludvigson)
