| The light-colored material is a localized Waulsortian Mound in the lower Mississippian Tin Mountain Limestone, Funeral Mountains, Inyo County, California--a specific variety of carbonate mudmound, characterized by abundant crinoid debris and lattice-style bryozoans, that is restricted worldwide to strata of earliest Mississippian geologic age. The locality lies on BLM (Bureau of Land Management)-administered land is therefore open to hobby collecting of reasonable amounts of common invertebrate fossils. Photograph courtesy James St. John. |