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CAVE POPCORN or CORAL


HOW DOES IT FORM?

Water either seeping out of limestone walls or splashing into a cave, deposits the mineral calcite in knobbly bumps, called cave popcorn or cave coral.

WHERE IS IT FOUND?

Cave popcorn can be found on walls, floors and even covering other formations. You can see it in all of our caves, but it is most obvious in Boyden Cave (where these photos were taken) and in Moaning Cave at the 65-foot level.

HOW IS IT IDENTIFIED?

Cave popcorn is shaped just like the popcorn we eat with lots of round, knobbly bits. The color can vary a little depending on the minerals present. As with other speleothems, you will often find them combined with other formations. The bottom photo shows cave popcorn that has a stalactite growing out of the bottom.
For more detailed information on speleothem formation, go to our Cavern Geology lesson plan's section on speleothems by clicking HERE.

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