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A Petoskey stone is a rock and a fossil, often pebble-shaped, that is composed of a fossilized rugose coral, Hexagonaria percarinata. [1] Such stones were formed as a result of glaciation, in which sheets of ice plucked stones from the bedrock, grinding off their rough edges and depositing them in the northwestern (and some in the northeastern) portion of Michigan's lower peninsula.
A particular variety of stone was found in abundance on his former lands and named after him, and the Petoskey stone was designated as the official state stone. His granddaughter, Ella Jane Petoskey, was asked by Michigan Governor George W. Romney to be an honored signatory on the bill assigning the Petoskey Stone as the state stone.
They were generally filter feeders, and grew to very large sizes. A common example of a colony coral is Hexagonaria, more commonly called the Petoskey stone, is the state stone of Michigan. Its name refers to the hexagonal shape of each of its corallites. These corals are very easy to identify.
The “Petoskey Stone” is the official stone of the state of Michigan. Hexagonaria percarinata was known by many earlier American paleontologists as Acervularia profunda and Cyathophyllum davidsoni. In the recent past it was usually identified as Prismatophyllum davidsoni." (emphasis added) Clearly this indicates that Prismatophyllum ...
The Petoskey Formation is an arenaceous limestone named for its locale (Petoskey, Michigan), and contains the eponymous Petoskey stones. The Whiskey Creek Formation is a limestone. The Traverse Group formed as a shallow carbonate shelf during the Devonian period (~419 to 359 Ma), when the most recent supercontinent , Pangea , was just beginning ...
Petoskey State Park is a public recreation area covering 303 acres (123 ha) on Lake Michigan in Bear Creek Township, Emmet County, Michigan. The state park is located three miles (4.8 km) northeast of the city of Petoskey on Little Traverse Bay. It is surrounded by heavily vegetated sand dunes that are excellent examples of parabolic dunes. [2]