Type Formation Region Florida Thickness 30 m Overlies Peace River Formation Named for Bone Valley, Florida | Underlies Pleistocene sand Country United States Primary Marl Unit of Hawthorn Group | |
Other Phosphorite pebbles, chert Named by G.C. Matson and F.G. Clapp, 1909 | ||
The Bone Valley Formation is a geologic formation in Florida. It is sometimes classified as the upper member of the Peace River Formation of the Hawthorn Group. It contains economically important phosphorite deposits that are mined in west-central Florida, as well as rich assemblages of vertebrate fossils.
Contents
Lithology
The Bone Valley Formation consists of sandy marl that contains pebbles of phosphate and chert, fragments of bone, and other organic remains. The finer grained material is soft and plastic when wet, but hardens when dry.
Age
The Bone Valley Formation contains mammal fossils and its age has been determined by mammalian biostratigraphy.
Period: Neogene
Epoch: Middle Miocene to Early Pliocene
North American land mammal age: Barstovian to Hemphillian
Paleontology
The Bone Valley Formation includes a diverse assemblage of vertebrate fossils. These include remains sea turtles, equines, felines, peccaries, and others.