Edge of light
by Gabriel Sigmund, Department of Environmental Geosciences - University of Vienna, Austria
Large interconnected cave systems are often found in limestone due to its high water solubility.
The Sumaguing Cave (in this picture) is within the Sagada formation that formed in the Eocene to Oligocene stages.
Taken on 14
Submitted on 29 February 2016
Credit: Gabriel Sigmund (distributed via imaggeo.egu.eu)
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