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Hi Anastasia,

Do you ever find little shell fossils in the rocks here in Missouri? Most of those fossils are lime stone.

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Thank you for sharing your fact about soda straws. They are so fragile looking!

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When stlactits are first made  thay are calld soda stralls.

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An Ice cave can change shape quickly with temperature changes.

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Lava tubes cool down and the cooling down creates

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Limestone caves have stalactites and stalagmites.  They take many years to form.  Missouri has more limestone caves than any other state in the United States.

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Volcanoes are hot when when they erupt. They create a blast.  After the lava dries up, it leaves a lava tube cave.

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Sea caves have salt water in them.   Ocean animals live in them.

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Sea caves are made by waves pounding against the rocky shore.  Sea cave are changing right now!

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When volcanoes erupt they make lava caves.  The caves form where the lava flows.

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Sea caves have tiny gaps.  A lot of animals live in this salt water habitat.  Sea caves do not have stalactites and stalagmites.

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Stalactites and stalagmites are made from limestone and water.  When fresh water mixes with carbon dioxide it makes the carbonic acid that eats away the limestone.

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An ice cave stalactite is called a icicle. They form on the ceiling from frozen water.

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When stalactites and stalagmites grow together, they make a column.

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Stalactites hang from the ceiling. Stalagmites grow from the ground. Formations inside limestone caves are called speleothems.

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Ice caves can melt from the hot sun and they can always change the next winter. The icicles can be very fragile.

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When volcanoes erupt magma flows out and forms lava tubes.