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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.
Fossils of this genus form Petoskey stones, the state stone of Michigan. [1] They can be seen and found in most Midwestern U.S. states. Hexagonaria is a common constituent of the coral reefs exposed in Devonian Fossil Gorge below the Coralville Lake spillway [2] and in many exposures of the Coralville Formation in the vicinity of Coralville ...
These reefs consist of a series of both high and low relief limestone ledges and pinnacles that exceed 15 metres (49 feet) in some areas. The roughly 348 NM² of this hardbottom region lies 150 kilometres (93 miles) south of the panhandle coast and 160 kilometres (99 miles) northwest of Tampa Bay between 28° 10' and 28° 45' N and 084°00' and 084°25' W
Florida's Coral Reef, the only coral reef system in the continental United States and the third-largest barrier reef ecosystem in the world, is a shallow-water reef. This deep-sea one is ...
John Pennekamp Coral Reef State Park is a Florida State Park located on Key Largo in Florida. It includes approximately 70 nautical square miles (240 km 2 ) of adjacent Atlantic Ocean waters. The park is approximately 25 miles in length and extends 3 miles into the Atlantic Ocean along the prominent Hawk Channel passage.
Comparing coral life on the ocean floor in the Florida Keys from 1992 to 2023. 1992 shows what scientists considered about 20-30% stony coral cover, and 2023 shows a mostly dead reef with a few ...
Key Largo Limestone in relation to other surface formations in South Florida. The Key Largo Limestone is a geologic formation in Florida.It is a fossilized coral reef. The formation is exposed along the upper and middle Florida Keys from Soldier Key (at the north end of the Florida Keys) to the Bahia Honda Channel (at the west end of Bahia Honda Key).
Eastern Dry Rocks is a coral reef located within the Florida Keys National Marine Sanctuary. It lies seven miles southeast of Key West and one mile east of Sand Key light within the Key West National Wildlife Refuge. This reef is within a Sanctuary Preservation Area (SPA).