Fossil

External mold of a bivalve from the Logan Formation, Lower Carboniferous, Ohio

Recrystallized scleractinian coral (aragonite to calcite) from the Jurassic of southern Israel

Fossils (from Classical Latin fossilis; literally, "obtained by digging") are the preserved remains or traces of animals, plants, and other organisms from the remote past. The totality of fossils, both discovered and undiscovered, and their placement in fossiliferous (fossil-containing) rock formations and sedimentary layers (strata) is known as the fossil record.

单词	Natural mold
释义	Natural mold 原声例句阿尔伯塔大学-恐龙古生物学 Footprints are natural molds of dinosaur feet. 脚印是恐龙脚的天然模子。英语百科 Fossil Fossils (from Classical Latin fossilis; literally, "obtained by digging") are the preserved remains or traces of animals, plants, and other organisms from the remote past. The totality of fossils, both discovered and undiscovered, and their placement in fossiliferous (fossil-containing) rock formations and sedimentary layers (strata) is known as the fossil record.
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Natural mold

Fossil