Hidden beneath concrete at San Pedro High School, construction workers found a buried secret — thousands of marine fossils ...
Land animals and plants usually decomposed or were eaten, and mainly the hard parts -- teeth, bones, shells, or wood -- were preserved. Fossils can be formed in several ways. Buried bone and shell ...
Based on the fossil record, ammonites came in a wide range of sizes and shapes, from smaller than an inch to as large as nine feet wide. Some ammonites had long, straight shells, while others had ...
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