Marginal Deep

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 It might be outdated or ideologically biased.

Marginal Deep

 

a crustal depression formed at the boundary between a geosyncline (geosynclinal system) and a platform in the late stage of development of the geosyncline, when orogeny occurs in its interior areas. Marginal deeps are usually filled with sediments of predominantly lagoon and Molasse formations, layers of which are dislocated in the form of folded blocks and diapir domes. Deposits of coal, oil, and natural gas are associated with marginal deeps.

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