A cavern is an underground chamber formed by erosion
A cave or cavern.
Two features formed by underground weathering are caves and sinkholes. Caves are formed by the dissolution of limestone or other soluble rocks, creating underground chambers and passages. Sinkholes are depressions in the ground that form when the roof of an underground cavern collapses.
The word "subterranean" is superfluous by definition, but essentially a cavern is a large void in the rock. Normally the term is applied a bit loosely to refer to particularly long, natural caves with many large chambers and passages; but is sometimes used to describe very large, man-made, underground chambers.
An underground cavern is a large cave or chamber typically found beneath the Earth's surface. These formations are often created through geological processes such as erosion, dissolution of rock, or volcanic activity. Underground caverns can contain unique ecosystems and geological features.
A cavern is a large underground opening formed by weathering and erosion. This process can occur in various types of rock formations, such as limestone or sandstone. Caverns often feature unique formations like stalactites and stalagmites as a result of dripping water and mineral deposits.
Peak Cavern was formed by the gradual erosion of the limestone rock by underground streams over millions of years. The dissolving of the limestone created a network of passages and chambers that make up the cave system we see today.
cavern Answer #2: A sinkhole.cavern
Name a feature that is formed by underground erosion
A cavern roof is the uppermost part of a cave that forms the ceiling of the underground chamber. It is typically formed by the natural processes of erosion, weathering, and water seepage over time. Cavern roofs can vary in appearance and structure depending on the type of rock or material they are composed of.
TBH the adjective is superfluous by definition! 'Cavern' is usually applied to a very large, usually natural but sometimes artificial, subterranean chamber. Sometimes it is applied to an entire cave system, especially if part of it is opened up for tourists - e.g. Carlsbad Caverns, Kent's Cavern. It tends not to be used in formal speleological writing: it is a 'chamber' whether of 10m3 or 1000m3 volume.
its a subterranean chamber ; a subterranean chamber is a underground room used to confuse robbers
Sarawak Chamber is largest underground chamber in the world by area. It is in Borneo.