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Collapsed Pingo

Collapsed pingo on the Tuktoyaktuk Peninsula in Canada. Unfrozen underground areas are sometimes engulfed by permafrost, causing that area to freeze. As it does, the pressure exerted by the expanding ice forces earth upward, forming a dome shape on the surface. This is called a pingo. Sometimes the surface of the dome cracks, exposing the underlying ice and allowing that ice to melt, which causes the dome to collapse. This is the process that has formed the topography in this image.
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Title:
Collapsed Pingo
Caption:
Collapsed pingo on the Tuktoyaktuk Peninsula in Canada. Unfrozen underground areas are sometimes engulfed by permafrost, causing that area to freeze. As it does, the pressure exerted by the expanding ice forces earth upward, forming a dome shape on the surface. This is called a pingo. Sometimes the surface of the dome cracks, exposing the underlying ice and allowing that ice to melt, which causes the dome to collapse. This is the process that has formed the topography in this image.
Category:
SCIENCE • Geology & Fossils
Credit:
Album / NASA/Science Source
Releases:
? Model Release: No - ? Property Release: No
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Image size:
2655 x 3128 px | 23.8 MB
Print size:
22.5 x 26.5 cm | 8.8 x 10.4 in (300 dpi)
Keywords: