Geosynclinal

adj, noun

Definitions

Adjective
  1. 1
    Of the Earth's crust, bending downward or subsiding and permitting the gradual accumulation of sediment.
Noun
  1. 1
    The downward bend or subsidence of the Earth's crust, which permits the gradual accumulation of sediment and hence forms the first step in the formation of a mountain range.

Etymology

Etymology 1

From geo- + synclinal.

Etymology 2

From geo- + synclinal.

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