noun
old orogenic belt; Palaeozoic mountain belt
Geological term referring to mountain belts formed during the Palaeozoic era. Used in academic and educational contexts.
古期造山帯は、古生代に形成された山脈のことを指します。
Old orogenic belts refer to mountain ranges formed during the Palaeozoic era.
Compound of 古期 (old period) + 造山帯 (orogenic belt). The term is a modern geological classification.