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The Mazon Creek fossil beds are a conservation lagerstätte found near Morris, in Grundy County, Illinois. The fossils are preserved in ironstone concretions, formed approximately 309 million years ago in the mid- Pennsylvanian epoch of the Carboniferous period. These concretions frequently preserve both hard and soft tissues of animal and ...
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 ...
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.
At this time fossils were discovered in nodules discovered at natural rock exposures along the Mazon Creek in Grundy County. Early in the 20th century, J. H. Bretz and H. A. Lowenstam studied the Silurian fossil reef systems of the Chicago area following a decline in scientific attention paid to the famous fossil reefs of similar age near ...
Essexella is an extinct genus of cnidarian known from Late Carboniferous fossils; it contains a single species, E. asherae. It is one of the most recurrent organisms in the Mazon Creek fossil beds of Illinois; [ 1] in the Essex biota of Mazon Creek, it consists of 42% of all fossil finds. [ 2] Essexella was originally described as a jellyfish ...
Mazon Creek: 310 Ma: Illinois, US A conservation lagerstätte found near Morris, in Grundy County, Illinois. The fossils from this site are preserved in ironstone concretions with exceptional detail. The fossils were preserved in a large delta system that covered much of the area.
Genus name Pohlsepia is came from its discoverer James Pohl. He is the son of Joe Pohl and together they have collected fossils in the Mazon Creek area. Originally from Wisconsin and Minnesota, Pohl is a native Midwesterner. He and his father have donated their fossils to museums in the area, including Pohlsepia mazonensis to the Field Museum.
A fossil hunter was scouring a Mississippi creek for remnants of the past when he came across the discovery of a lifetime — a tusk from an ice age Columbian mammoth. He stumbled onto a large ...