1. of or relating to a geosyncline; characterized by a large, elongated depression in the Earth's crust where sediments accumulate
Usage: geology; technical

1. a large, elongated depression or trough in the Earth's crust in which thick sequences of sedimentary and volcanic rocks accumulate over geological time
Usage: geology; technical

Examples

• The Appalachian region was formed in a geosynclinal basin during the Paleozoic Era.
• Geosynclines are important for understanding how mountain ranges develop over millions of years.
• The geosynclinal deposits in this area contain valuable mineral resources.
• Geologists study geosynclinal structures to interpret the tectonic history of continents.
• The thick sedimentary layers in the geosynclinal trough indicate prolonged subsidence.