Sandstone Potholes is a photograph by Dr Juerg Alean/science Photo Library which was uploaded on September 12th, 2018.
Sandstone Potholes
Potholes formed on horizontal sandstone surfaces due to biological weathering. Water collected in the depressions harbours a biofilm of microbes that... more
Title
Sandstone Potholes
Artist
Dr Juerg Alean/science Photo Library
Medium
Photograph
Description
Potholes formed on horizontal sandstone surfaces due to biological weathering. Water collected in the depressions harbours a biofilm of microbes that dissolves siliceous minerals in the sandstone and thus widens the holes. The biofilm consists of cyanobacteria, fungi, and algae. Due to the low temperatures of the desert nights, the water in some holes in the background is still frozen. Photographed in Navajo National Monument, Arizona, USA.
Uploaded
September 12th, 2018
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