Caves of the Mendip Hills Caves of the Mendip Hills The caves of the Mendip Hills are formed by the particular geology of the Mendip Hills: large areas of limestone worn away by water makes it a national centre for caving. The hills conceal the largest underground river system in Britain. The hills consist of anticlines of Carboniferous Limestone lying over Devonian Old Red Sandstone, with the sandstone exposed on the summits. When a surface stream running off the sandstone reaches the limestone it sinks below ground through a "swallet", (also known locally as a "slocker"), continuing on its way down towards sea level by
Tamana caves Tamana caves Tamana caves (or Tamana cave) is a cave system located on the northern slope of Mount Tamana in eastern Trinidad. Mount Tamana is a 307-metre flat topped hill of Miocene Guaracara Limestone of the Tamana Formation in the eastern Central Range. Julian Kenny described the main cave as consisting of 18 separate sections. He documented two chimneys and a "walk-in chamber". The walk-in chamber connected to a "boulder chamber" that was heavily used by bats, and to a crawl hole which connected to the remainder of the cave system. Beyond the crawl hole was a subterranean stream and