tectonic cave

Tectonic caves are geological formations created by the mechanical separation of bedrock along joints or fractures. These caves typically appear as high, narrow fissures with parallel walls. The bedrock must be strong and brittle, such as sandstone or granite, to form these caves.1

The primary mechanism for their formation is gravity sliding, often facilitated by lubricating layers like shale between massive rock beds. This slippage causes the rocks to separate along vertical fractures, forming the cave passages. While tectonic caves are common, they are usually small, ranging from a few meters to a few hundred meters in length, and often consist of a single passage. They can also form a grid or network pattern mirroring the fracture system.1