Petoskey Stones

Petoskey Stones are found in the northern part of the Lower Michigan Peninsula, and are actually fragments of Devonian Period coral reefs. These reefs grew in what is now Michigan about 360 million years ago, when the area was covered by a shallow sea. The particular species of coral represented is Hexagonaria percarinata, an example of what is known as a tabulate coral, one of two main types (along with rugose "horn" corals) that made up the reefs of the Paleozoic Era. Both tabulate and rugose corals were decimated at the end of the Paleozoic, and replaced by the scleractinian corals which are common in reef environments today. 

Michigan was extensively resurfaced by glaciers during the Pleistocene (the last 1.6 million years), and as part of this process, moving glaciers plucked up pieces of the bedrock and carried them along, smoothing and rounding them in transport.   Petoskey Stones are Michigan's "State Stone"

 

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(Click Photo to Enlarge)

Name: Petoskey Stone
Geologic Age: Devonian (345 Million Years Ago)
Stratigraphic detail: Lower Peninsula
Location: Michigan

Petoskey Stone  1 $20.00


(Click Photo to Enlarge)

Name: Petoskey Stone
Geologic Age: Devonian (345 Million Years Ago)
Stratigraphic detail: Lower Peninsula
Location: Michigan

Petoskey Stone  6 $30.00


(Click Photo to Enlarge)

Name: Petoskey Stone
Geologic Age: Devonian (345 Million Years Ago)
Stratigraphic detail: Lower Peninsula
Location: Michigan

Petoskey Stone  7 $30.00


(Click Photo to Enlarge)

Name: Petoskey Stone
Geologic Age: Devonian (345 Million Years Ago)
Stratigraphic detail: Lower Peninsula
Location: Michigan

Petoskey Stone  9 $30.00


(Click Photo to Enlarge)

Name: Petoskey Stone
Geologic Age: Devonian (345 Million Years Ago)
Stratigraphic detail: Lower Peninsula
Location: Michigan

Petoskey Stone  10 $30.00


(Click Photo to Enlarge)

Name: Petoskey Stone
Geologic Age: Devonian (345 Million Years Ago)
Stratigraphic detail: Lower Peninsula
Location: Michigan

Petoskey Stone  11 $50.00


(Click Photo to Enlarge)

Name: Petoskey Stone
Geologic Age: Devonian (345 Million Years Ago)
Stratigraphic detail: Lower Peninsula
Location: Michigan

Petoskey Stone  12 $130.00