Geology: Stalactites and Stalagmites

Scientists, today’s lesson is about Geology! 

Did you ever visited a cave and noticed spikes that were coming down from the ceiling or appearing from the ground?

Stalactites and stalagmites appear in caves with calcium carbonate rocks and they are basically this sedimentary rock formations that appear in the grotto’s ceiling (stalactites) or grow from the floor (stalagmites).
This phenomenon occurs when water from rain or rivers that passes through cracks in the soil dissolves the limestone from the rocks, then penetrating the subsoil and reaching the cave’s ceiling. This water then starts to slowly drop and gradually starts to form some sort of straws or cones with the fragments of mineral that it carries.
At the same time, the water that reaches the ground creates sediments that grow from the ground up.

In the UK you can watch this phenomenon by visiting the White Scar Cave, Gough's Cave, Cox's Cave or Dan yr Ogof.

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