"The remains or imprints of plants or animals preserved from prehistoric times by the operation of natural conditions. Fossils are found in sedimentary rock, asphalt deposits, and coal and sometimes in amber and certain other materials. The scientific study of fossils is paleontology."
From The Columbia Electronic Encyclopedia, Sixth Edition
Please note that sites offering fossils for sale will NOT be listed here.
Sites listed here will provide information on collecting and studying fossils, and on the fossils themselves.