https://www.lvnhm.org/post/fossil-friday-there-are-many-different-kinds-of-fossils-part-4
Fossil Friday: There are Many Different Kinds of Fossils! Part 4
Aug 13, 2022 - Part 4 of a series on fossils refers to fossils that are permineralized, petrified, casts, and unaltered body fossils.
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https://ncse.ngo/fossil-friday-4
Fossil Friday | National Center for Science Education
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