Paleocene nonmarine mollusca from the Raton Formation, Raton Basin, New Mexico
Joseph H. Hartman
In 1917, W. T. Lee reported on the only faunule of nonmarine Mollusca so far known from the
Upper Cretaceous-Paleocene strata of the Raton Formation of the Raton Basin, New Mexico. The specimens
collected by Lee are poorly preserved as goethite-stained steinkems consisting of tine-grained feldspathic
sandstone. The taxa recognized include the bivalve Unionidae, gen. & sp. indet. and the viviparid gastropods
Viviparus sp. indet. and Campeloma sp. indet. These freshwater fossils were found on the top of the west wall
of Dillon Canyon, about 1.6 km above the mouth of Coal Canyon, north of Blossburg, Colfax County, New
Mexico. The stratigraphic position of the locality is estimated to be about 195 m above the base of the Raton
Formation and approximately 165 m above the base of the Paleocene.
- Hartman, Joseph H., 1987, Paleocene nonmarine mollusca from the Raton Formation, Raton Basin, New Mexico, in: Northeastern New Mexico, Lucas, S. G.; Hunt, A. P., New Mexico Geological Society, Guidebook, 38th Field Conference, pp. 271-273.