[A] Ways to determine the age of a fossil. [C] A comparison of two shellfish fossils. [B] The identity of a fossil the woman found. [D] Plans for a field trip to look for fossils.
[A] Ways to determine the age of a fossil. [C] A comparison of two shellfish fossils.
[B] The identity of a fossil the woman found. [D] Plans for a field trip to look for fossils.