Thousands and thousands!
You would have to trawl through the world's caving literature to count them all. I'll leave that you - I'd rather explore caves than count them.
However, intrigued by this, I carried out an approximate count of the index in my 1977 edition of the UK cavers' guide-book, Northern Caves Vol.5.
It lists roughly 450 caves - and that in just part of the North of England.
Mendip Underground 1987 is a similar guide to around 60 caves on the geographically compact Mendip Hills,S.W. England - there are many more caves on Mendipbut that book details onlythe caves of greater interest to the "sporting" caver.
So there are 500+ caves in just 2 areas of England. Now consider all the other caves in the UK and Eire, then think of all those in France, the USA, Russia, S.E.Asia, Greece, Mexico, .....
The vast majority of the world's caves are in limestone.
Limestone
"Caves" - simply that... but if in limestone they are by definition part of a karst landscape.
normally damp weather with a lot of rain or snow depending where you are in the world
Carbonic Acid .
Other way round! Water and/or air are in caves.:-) Most of the world's caves have formed / are forming in limestone.
The vast majority of the world's caves are in limestone.
It's found around them! The vast majority of the world's caves are formed in limestone (soluble in ground-water).
Limestone is a type of rock that is easily eroded by water, which can create caves over time. Water dissolves the limestone rock to form caves through a process known as chemical weathering. Additionally, limestone can also be carved out by underground rivers or other natural forces, resulting in the formation of caves.
Limestone Caves e.g The Marble Arch Caves in Northern Ireland(Fermanagh)
They are both caves
Limestone is the rock that is in Caves. When carbonate acid is reacted to the limestone in the caves, it will corrode forming strange caves landforms.
Limestone caves are formed through a process called karstification, where rainwater picks up carbon dioxide from the air and soil, creating a weak carbonic acid. This acidic water dissolves the limestone rock over time, creating underground cavities and passages. As the water drains away, it leaves behind caves and unique formations such as stalactites and stalagmites.
generally, in limestone uplands, where the limestone is sufficiently massive to hold caves, and particularly but not exclusively where the local surface drainage can concentrate rainwater into discreet streams than can then form sink caves when they flow onto the limestone.
Yes Missouri is famous for its limestone caves.
No, not all caves are made of limestone. Caves can be formed in various types of rocks, including granite, sandstone, and volcanic lava flows. Limestone caves are common because limestone is soluble and can be eroded by water to create cave systems, but caves can also form in other types of rocks through different geological processes.
In caves formed in limestone - as are most of the world's caves although not all such caves contain stalagmites and stalactites. They are precipitations of calcite dissolved from the host limestone by carbonic acid - rain water acidified by atmospheric carbon dioxide dissolved in it.