Easily eroded by water, limestone's composition means it makes up spectacular sights all over the world. Learn about some of the surface and underground features of this rock type.
- Limestone is a sedimentary rock formed underwater over millions of years.
- Limestone is permeable, soluble and reactive with acid, and is worn away over time by rainwater to form distinctive features.
- The erosion of limestone at the Earth's surface creates karst landscapes, sinkholes, narrow valleys and steep-sided gorges.
- Limestone caves are formed below the surface and rainwater drains through the rock to form stalactites (drips from the ceiling) and stalagmites (from the landing drips).
Limestone makes-up around 10% of Earth's surface.
Nullarbor Plain, Australia
It forms diverse landscapes and features from vast, arid plateaus.
To sharp mountain pinnacles.
Limestone is sedimentary rock formed underwater over millions of years.
Limestone: Sedimentary rock, Formed underwater over millions of years, At least 80 % calcium carbonate
But even above sea level, water's influence ...
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