In Geology used by different writers in various senses, with allusion to the Harz Mountains. Of, pertaining to, or contemporaneous with the…

Of, pertaining to, or designating the orogeny during which the mountain ranges in the west of the Americas, or the Rocky Mountains in particular…

Geology. Designating or relating to the great mountain-building episode of late Silurian and early Devonian times in Britain and Scandinavia; also…

Geology. Designating the mountain-building movements which occurred in Europe in late Carboniferous or early Permian times, or the mountains then…

Of, pertaining to, or designating a mountain system that formerly extended from southern Ireland and Britain through central France and Germany to…

Epithet of an orogeny that occurred in Ordovician times in eastern North America.

Designating, or pertaining to, a minor orogenic episode in Europe which is believed to have occurred in the Permian period. Also elliptical as n.

Designating or relating to this episode.

Of or pertaining to rocks in the vicinity of Shamva, a town in northern Zimbabwe; spec. the epithet of a Pre-Cambrian mountain-building episode in…

Geology. Formed or occurring approx. 500 million years ago in Africa (during the late Precambrian or early Palaeozoic), a period during which…