Limestone and limestone formations.
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?
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.
Mammoth cave began forming about 10 million years ago when an ancient sea covering the central United States disappeared and erosional forces let cracks and holes expose the limestone that was beneath the sea. Rainwater began to get underground and hallowed out the cave.
Caves are generally formed in areas rich in limestone, which erodes as water flows over it over time.
While a funnel-shaped depression of limestone eroded by rainwater is called a limestone pavement or a doline, a cave is a naturally occurring underground void typically formed through chemical weathering and erosion processes such as the dissolution of limestone by acidic groundwater.
Ellison Cave was formed by the erosion of the rock by water over millions of years. The cave was created as groundwater seeped through the limestone bedrock, dissolving and creating intricate passageways underground. Over time, the cave continued to grow and develop into its current size and complexity.