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Written by: Jim Beard
Friday December 19, 2014

Cluster of mica grains in sedimentary rock. This small fragment of mica-rich rock was deposited in a shallow lake about 225 million years ago. The small white crystals are the mineral dolomite which grew in the rock after it was deposited. What most people see is a spaceship traversing the stars. Sometimes microphotos are just fun. Crossed polars, field of view 2.5 mm.

December Microphoto of the Month

Tags: Dr. Jim Beard, Earth Science, Geology, Microphoto of the Month, Research and Collections