Limestone: Features

Limestone forms diverse landscapes, from plateaus to mountain pinnacles. It is a sedimentary rock formed underwater, influenced by water even above sea level. Limestone is permeable, soluble, and reactive to acid, leading to unique features like limestone pavements and sinkholes. Water erosion creates narrow valleys and gorges, while underground streams form stalactites and stalagmites in caves. These caves vary in size, some large enough for exploration and stunts.

What characteristic of limestone makes it susceptible to forming unique landscapes?

• Its metallic content

• Its impermeability

• Its solubility and permeability

• Its hardness

How are narrow valleys in limestone regions primarily formed?

• By glacial meltwater and river erosion

• By tectonic movements

• By wind erosion

• By volcanic activity

What happens when water drains through limestone and mixes with calcium carbonate?

• It becomes acidic

• It creates stalactites and stalagmites

• It evaporates quickly

• It forms granite

What is the result when a stalactite and a stalagmite meet?

• A gorge

• A limestone pavement

• A sinkhole

• A column

What is a common feature of limestone caves?

• They are always small

• They are formed by wind

• They can vary greatly in size and shape

• They are impermeable