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Pit 11 is now Braidwood State Fish and Wildlife Area, an Illinois state park. Fossil collecting is allowed at the park with a permit. [8] The site's importance was realized in the mid-nineteenth century: "the nodules of Mazon Creek, where fragments of plants, even of the softest texture, have been preserved in their integrity". [9]
The Florissant Formation is a sedimentary geologic formation outcropping around Florissant, Teller County, Colorado. The formation is noted for the abundant and exceptionally preserved insect and plant fossils that are found in the mudstones and shales. Based on argon radiometric dating, the formation is Eocene (approximately 34 million years ...
Prehistoric sites in Colorado. McElmo Drainage Unit. Sites include: Cramer, Canterbury, Snake Blakeslee, Juan Baca, Munsell. Not listed on the State Register site. Bellwood type site, Graneros phase, Arkansas River basin. The state register reports occupancy from 3000 BC - AD 1540.
Schram, 1969. Other species. †T. gigantion. Schram, 2007. Tyrannophontes is an extinct genus of mantis shrimp that lived during the late Carboniferous period in what is now the Mazon Creek fossil beds of Illinois. It is the only genus in the family Tyrannophontidae. The type species, T. theridion, was described in 1969 by Frederick Schram.
Morrison Formation. Type locality for the Morrison Formation above the town of Morrison, Colorado. The Morrison Formation is a distinctive sequence of Upper Jurassic sedimentary rock found in the western United States which has been the most fertile source of dinosaur fossils in North America. It is composed of mudstone, sandstone, siltstone ...
Indian Springs Trace Fossil Natural Area. Location. Fremont County, Colorado, USA. U.S. National Natural Landmark. Designated. 1980. Indian Springs Trace Fossil Natural Area is a 40-acre [nb 1] privately owned site on the Indian Springs Ranch in Fremont County, Colorado. It was designated a National Natural Landmark in 1980.
The Mazon River or Mazon Creek ( / məˈzɒn / ), is a tributary of the Illinois River in the United States. The confluence is near Morris, Illinois. [ 2] The Mazon River is associated with the Mazon Creek fossils of the Francis Creek Shale, which are also exposed in strip mines and quarries near the River. This fossil bed includes well ...
T. gregarium fossil (part and counterpart). Amateur collector Francis Tully [] found the first of these fossils in 1955 in a fossil bed known as the Mazon Creek formation. He took the strange creature to the Field Museum of Natural History, but paleontologists were stumped as to which phylum Tullimonstrum belonged in. [7] The species Tullimonstrum gregarium ("Tully's common monster"), as these ...