After a detailed comparison with fossil records, they found that the living clam closely resembled a specimen first described by paleontologist George Willett in the 1930s. Willett had named the ...

20. What is the mode of preservation? What is your evidence? What information can you extract from this fossil? 21. These are both brachiopods (not clams). Without knowing anything about the biology ...

Most people see the Central Valley as all agriculture,” one paleontologist said, but it’s a rich source of prehistoric treasures.