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SEM image of the silicified microbial mats that form Castle Geyser

By Yellowstone
SEM image of the silicified microbial mats that form Castle Geyser
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Detailed Description

Scanning Electron Microscope (SEM) image of the silicified microbial mats that form Castle Geyser. USGS image by Dakota Churchill.

Sources/Usage

Public Domain.