An Orogeny Is

Multiple Choice

An orogeny is:

A) the formation of mountains or the time period during which tectonic activity causes deformation and forms mountains
B) the subsidence of a continent under the weight of continental glaciation during an ice age
C) a cycle of erosion and deposition during which large areas of horizontal sedimentary rock are created
D) a unit of geologic time which is longer than an epoch, but shorter than a period