GEOLOGICAL TIME, STRATIGRAPHY & PALEONTOLOGY

Joe Duncan's Geological Time Scale Test 

Eighteenth and Nineteenth Century scientists

Geological Time Scale

The angular unconformity at Slim Buttes, South Dakota.
Dipping Oligocene strata overlain by horizontal Miocene strata.
Photo A.C. Ashworth

Unconformities

Fossils, Rocks and Time (USGS)

Facies, Transgressions and Regressions

Paleontology (An excellent resource from the Museum of
                            Paleontology, University of California, Berkeley)