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Lava
 Tom Gidwitz
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Some of these layers of rock were formed by lava from volcanoes. Others layers were once mud or sand. The layers hold fossils of fish, clams, snails and animals too tiny to see.
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Tom Gidwitz
|
Some of these layers of rock were formed by lava from volcanoes. Others layers were once mud or sand. The layers hold fossils of fish, clams, snails and animals too tiny to see.
|