In Arizona there are a strange series of 50 large craters in the ground in less than a square mile of area. These features are not volcanic in origin, but rather formed through a different process. This is the story of how the McCauley Sinks in Navajo County formed, as they are a type of karst landform.
Thumbnail Photo Credit: Google Earth. This image was then overlaid with text in addition to GeologyHub made graphics.
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Google Earth imagery used in this video: ©Google & Data Providers
Sources/Citations:
[1] U.S. Geological Survey
[2] Neal, J.T., Johnson, K.S. McCauley Sinks: A compound breccia pipe in evaporite karst, Holbrook basin, Arizona, U.S.A.. Carbonates Evaporites 17, 98–106 (2002). [ Ссылка ]
[3] The Google Earth KMZ file used to approximate the ages of rock units via a Geologic Map of Arizona was downloaded from: U.S. Geological Survey, Alaska geologic map data, at [ Ссылка ]
0:00 Volcanoes, Caves, & Craters
1:24 Ancient Arizona
1:55 McCauley Sinks Formation
2:31 Concentric Pattern
3:21 Conclusion
