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Ohio Sandstone: Berea Grit in Northeast Ohio, originally used for grindstones, later used to build the Federal Reserve Bank of New York [6] [7] Ohio bluestone, also found in Northeast Ohio in certain streambeds [8] [9] and used as dimension stone; Pennsylvania Bluestone in northeast Pennsylvania and adjoining parts of New Jersey and New York
In 1986, California named benitoite as its state gemstone, a form of the mineral barium titanium silicate that is unique to the Golden State and only found in gem quality in San Benito County. [80] ^ Colorado is the only state whose geological symbols reflect the national flag's colors: red (rhodochrosite), white (yule marble), and blue ...
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.
In the 1960s, archaeologists digging at the site found caves with artifacts left by hunter-gatherers 12,000 years ago, during the last Ice Age. A Paleo-Indian fluted point, a very rare stone tool, was among them.[1] At the time of its discovery it was the oldest such site east of the Mississippi.[2]
Commercial gas development began in 1859–60 with a well at East Liverpool, Ohio. Oil was discovered in the Berea Sandstone in 1860 in Mecca Township, Trumbull County, Ohio. [24] In Michigan, Berea Sandstone oil was first discovered in 1925 at Saginaw; this field accounted for the entirety of Michigan's oil production until 1927. [25]
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Eastern North America in the Middle Devonian, showing the Michigan Basin of the Rheic Ocean. In Michigan, the Bedford Shale is found in the southeast along shores of Lake Erie and Lake St. Clair; along the shore of Lake Huron north of Saginaw Bay; along the south shore of the Straits of Mackinac; north of 44 degrees latitude along the shore of Lake Michigan; and in the far southwest corner of ...
Blue rings found in the stems of trees and bushes in Norway point to a historic cold period in the late 1800s, but the exact cause of this climatic event remains unclear, scientists say.