1. Education

Sinkhole, Oman

Erosional Landform Pictures


Sinkholes are closed depressions that arise in two events: groundwater dissolves limestone, then the overburden falls into the gap. They are typical of karst. The more general term for karstic depressions is doline.
Common in limestone country
Photo courtesy Trubble of Flickr under Creative Commons license
Top Related Searches

©2014 About.com. All rights reserved.