All Rift Valleys and Depressions

This group collects the Structural and Tectonic Formations subcategory's members that are rift valleys and related extensional depressions, formed where the crust is being pulled apart along a divergent plate boundary or a zone of continental extension, from Iceland's Thingvellir Rift Valley to major continental rift systems elsewhere. These features are geologically the opposite process from the subcategory's domes and uplifts group, extension rather than compression, and several remain sites of active plate separation today.