Speleology is the scientific study of caves and other karst features, their make-up, structure, physical properties, history, life forms, and the processes by which they form (speleogenesis) and change over time (speleomorphology).
Important subdivisions of speleogy are cave hydrology, cave biology, geochemistry of speleothems, cave surveying and mapping. Speleologists also work with archaeologists in studying underground ruins, tunnels, sewers and aquaducts, such as the various inlets and outlets of the Cloaca Maxima in Rome.*
Speleology is also sometimes applied to the activity of exploring caves. This is more commonly known as caving or spelunking.
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Speleology :: Outdoors
Speleology :: Outdoors

Bone-Norman Cave System - Photographs of and information about this system in West Virginia.
Closed and Limited Access Caves of TAG - Provides a list of closed and limited access caves in Tennessee, Alabama, and Georgia, USA.
IronMiners.com - IronMiners.com - A historical and visual documentation of the various mines in the highlands of NJ, NY, and PA. Forum, mine description, mining terms and contacts.
Lechuguilla Photo Map - Detailed survey of Lechuguilla Cave, New Mexico, USA with linked photos and 3D animation.
Nutty Putty Cave - Located near Provo, Utah, USA. Includes news, a suggested equipment list, driving directions, a map of the interior and photographs.
U.S. Cavers Forum - Cave related discussions and information.
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