Paleontology Crossword

Any method of measuring the age of an event or object in years
A unit of geological time
A trace or remains of organisms that lived long ago
The study of the origin, history, and structure of the earth
A fossil that is found in rock layers from only one geologic age and is used to establish the age of the rock
A mark or cavity made in sedimentary rock by a shell or other body parts
A person who studies fossils
Any method of determining whether an event or object older or younger than another
A fossilized mark that shows activity or movement of an animal
A principle that states that the geologic processes that occurred in the past are the same geologic processes that occur today
The principle that states that younger rocks lie above older rocks if the layers have not been disturbed
A type of fossil that forms when sediments fill in the cavity left by decomposed organisms
A way in which organisms have been fossilized by being trapped in preserved in sticky thick pools
Pangea
Process in which minerals replaced an organism's tissues
Way in which organisms are fossilized and preserved in sticky tree sap
The death of every member of a species
The current era "age of mammals"
An event that happens suddenly
Principle that states that sediments will be deposited in horizontal layers