A study of the organisms that once lived on the Earth. Includes an examination of the processes of fossilization and methods of discovering the structure, habitat, and relationship of those organisms, and a review of their distribution and life history. A broad spectrum of organisms is studied with emphasis on invertebrate animals. Lectures, laboratories, field trip. Also listed as Geology 313. Prerequisite: Geology 152 or Biology 224 and 225. Not offered 2013-2014.