Limestone and limestone formations.
by the limestone in the cave formed by dissolution by the limestone in the cave formed by dissolution
it is a 'karst' cave, i.e. formed by the action of water on limestone.
From dissolution and erosion of limestone by acidic water over time.
a cave
Calcite, usually, from the limestone above the cave. (Or gypsum, if the cave is in that rock)
A cave?
A cave or sinkhole.
Fallen boulders, calcite formations and sediment! Mammoth Cave is a karst cave; formed within limestone.
Same way as any limestone cave: dissolution of the rock by weakly acidic water flwoing through fractures and other discontinuities.
In similar ways to any cave in limestone: dissolution and other karst-landscape processes.
Limestone caves are sometimes called solution caves because they are formed through a process called solution weathering. This occurs when water containing carbon dioxide dissolves the limestone rock, creating cave systems over time. The dissolved limestone is carried away in the form of a solution, hence the term "solution cave."
Mainly, fresh air surrounded by limestone! A cave is a void, or set of voids, formed within limestone.