- age of caves
- The ages of individual caves may vary enormously. In most regions the youngest cave passages have reached their present dimensions during the last 10,000 years, or since the last Pleistocene glacial retreat. In higher latitudes most caves can be related to erosion during the later Pleistocene climatic variations of the last million years, and older caves have largely been removed by continuing surface lowering. In tropical regions less interrupted erosion conditions have encouraged survival of older caves; the Mulu caves of Sarawak include large passages at least two million years old. Relict caves hundreds of millions of years old may survive in some buried limestones, but are commonly filled with younger sediments (see neptunian deposits), minerals or, very rarely, igneous rocks. These fill materials may themselves be dateable, either on the basis of contained fossil material (including pollen), by comparison with similar rock types that occur at the surface or by isotopic age determination methods identical to those applied to suitable surface rock materials. See also dating of cave sediments .
A Lexicon of Cave and Karst Terminology with Special Reference to Environmental Karst Hydrology. Courtesy of the author & The Karst Waters Institute. 2002.
См. также в других словарях:
Caves of the Mendip Hills — The Caves of the Mendip Hills are formed by the particular geology of the Mendip Hills, with 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.… … Wikipedia
Caves of Nerja — Some of the stalactites and stalagmites in the cave. The Caves of Nerja are a series of caverns close to the town of Nerja in Andalusia. Stretching for almost 5 km the caverns are one of Spain s major tourist attractions. Concerts are… … Wikipedia
Caves taillevent — Taillevent (restaurant) Pour les articles homonymes, voir Taillevent. L enseigne du Taillevent, rue Lamennais à Paris Taillevent est un restaurant gastronomique situé à … Wikipédia en Français
Caves del Monte Castillo — Cave of Altamira and Paleolithic Cave Art of Northern Spain * UNESCO World Heritage Site Country Spain Type Cultural Criteria … Wikipedia
Caves of Nanumanga — In 1986, off the northern shore of Nanumanga island in western Polynesia s Tuvalu group, two scuba divers found an underwater cave more than 40 metres down the wall of a coral cliff. Dark patches on the roof and walls and blackened coral… … Wikipedia
Oregon Caves National Monument — Coordinates: 42°05′44″N 123°24′21″W / 42.09556°N 123.40583°W / 42.09556; 123.40583 … Wikipedia
Marble Arch Caves Global Geopark — The Marble Arch Caves Global Geopark straddles the border between Northern Ireland and the Republic of Ireland. It is centred on the Marble Arch Caves and in 2001 it became one of the first Geoparks to be designated in Europe. The Geopark… … Wikipedia
Wookey Hole Caves — Infobox Cave name =Wookey Hole Caves photo =WookeyHole.jpg caption =River Axe emerging from Wookey Hole Caves location =Wookey Hole, Somerset, England depth = length = coordinates =coord|51|13|41|N|2|40|17|W|display=inline,title survey = survey… … Wikipedia
Ajanta Caves — Infobox World Heritage Site WHS = Ajanta Caves State Party = IND Type = Cultural Criteria = i, ii, iii, vi ID = 242 Region = Asia Pacific Year = 1983 Session = 7th Link = http://whc.unesco.org/en/list/242Ajanta Caves in Maharashtra, India are… … Wikipedia
Klasies River Caves — are a series of caves located to the east of the Klasies River mouth on the Tsitsikamma coast in the Humansdorp district of Eastern Cape Province at the southernmost tip of South Africa. In 1998, the South African government submitted a proposal… … Wikipedia