Hydrolaccolith

hydrolaccolith

[‚hī·drə′lak·ə‚lith]

(geology)

A frost mound, 0.3-20 feet (0.1-6 meters) in height, having a core of ice and resembling a laccolith in section. Also known as cryolaccolith.

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Hydrolaccolith

 

a perennial pingo with an ice nucleus, which forms as a result of an increase in the volume of underground water with freezing under conditions of hydrostatic head in regions containing perennially frozen rocks. Hy-drolaccoliths reach 25-40 m in height and 200 m in width and have the shape of a dome with steep slopes, a gentle hill, or a billow-like rise. The nucleus is covered on top by raised, deformed deposits that are broken by cracks. In the USSR hydrolaccoliths are found primarily in Yakutia.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.