Fossilization areas are generally used as sedimentation areas such as sea, lake, swamp. Besides being a sudden fossilization, it is also effective in fossil formation that living things have hard parts such as shells, bones and teeth. In some cases, parts such as muscles, skin, feathers and fish scales have also been preserved as fossils. Rarely, muscle tissue is preserved. In Siberia and Alaska, frozen remains were found in the ice of the extinct species called mammoth.
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