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Conodont elements consist of mineralised teeth-like structures of varying morphology and complexity. The evolution of mineralized tissues has been puzzling for more than a century. It has been hypothesized that the first mechanism of chordate tissue mineralization began either in the oral skeleton of conodonts or the dermal skeleton of early ...
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Ozarkodina snajdri forms a subdivision of the Pseudomonoclimacis latilobus graptolite zone in the Burgsvik beds Silurian formation in Sweden. [2] An Ozarkodina snajdri crispa zone has also been identified in the Wills Creek in Virginia.
Hindeodus was first described by Rexroad and Furnish in 1964 during the Illinois State Geological Survey's study of Mississippian stratigraphy. [11] The specimen was found in the Pella Formation of South-central Iowa which is known for excellent preservation of conodonts.
White City (sometimes listed as White City Amusement Park in print advertisements) was a recreational area located in the Greater Grand Crossing and Woodlawn community areas on the south side of Chicago from 1905 until the 1950s. [1] At the time of its opening, on May 26, 1905, it was claimed to be the largest park of its type in the United ...
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The Krause Music Store in Lincoln Square 26th Street in Little Village A woodblock print (1925) of Maxwell Street by Todros Geller A Portage Park two-flat, or Polish flat, in Chicago's Bungalow Belt Wacławowo is derived from the Polish name for the church of St. Wenceslaus. Photographer Richard Nickel was married here in 1950.
In contrast, paraconodont 'teeth' have a single main component which only grows downwards via additional sheath-like layers. As a result, the tip of the 'tooth' remains fully exposed and unmodified through its entire lifetime, while the base of the 'tooth' eventually expands into a rimmed cavity.