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  2. List of principal and guide meridians and base lines of the ...

    en.wikipedia.org/wiki/List_of_principal_and...

    Primarily from the United States Government Printing Office Style Manual. [1] State names usually signify only parts of each listed state, unless otherwise indicated. Based on the BLM manual's 1973 publication date, and the reference to Clarke's Spheroid of 1866 in section 2-82, coordinates appear to be in the NAD27 datum.

  3. List of U.S. state minerals, rocks, stones and gemstones

    en.wikipedia.org/wiki/List_of_U.S._state...

    ^ Florida's state gem, moonstone, was adopted to highlight Florida's role in the United States' Lunar program, which landed the first astronauts on the Moon. [81] ^ Since 1983, Massachusetts has had 3 other official state rocks: State Historical Rock (Plymouth Rock), State Explorer Rock (Dighton Rock), and State Building and Monument Stone . In ...

  4. Plattin Limestone - Wikipedia

    en.wikipedia.org/wiki/Plattin_Limestone

    The Plattin Limestone is a Middle Ordovician geologic formation in Arkansas, Illinois, and Missouri. [1] The name was first introduced in 1904 by Edward Oscar Ulrich in his study of the geology of Missouri. [2] A type locality was designated at the mouth of the Plattin Creek in Jefferson County, Missouri, however a stratotype was not assigned ...

  5. Geology of Illinois - Wikipedia

    en.wikipedia.org/wiki/Geology_of_Illinois

    The earliest Carboniferous rocks sit conformably on top of the youngest Devonian in Illinois; Carboniferous rocks in the state are areally extensive, regionally very well-exposed, and form a large percentage of the state's bedrock. Illinois remained marine for much of the Carboniferous, with limestones making up most of the rock deposited ...

  6. List of U.S. state fossils - Wikipedia

    en.wikipedia.org/wiki/List_of_U.S._state_fossils

    Arkansas: still no state fossil in Arkansas, though the state designated Arkansaurus as its state dinosaur. [1] District of Columbia: Capitalsaurus is the state dinosaur of Washington D.C., but the District has not chosen a state fossil. Florida: There is no state fossil in Florida, though agatised coral, which is a fossil, is the state stone ...

  7. Geography of Arkansas - Wikipedia

    en.wikipedia.org/wiki/Geography_of_Arkansas

    Location of Arkansas in the United States. Arkansas is located in the southeastern United States, in the West South Central Census Bureau division. Arkansas covers an area of 53,179 square miles (137,733 km²) and ranks as the 29th largest state by size. [7]

  8. Geography of Illinois - Wikipedia

    en.wikipedia.org/wiki/Geography_of_Illinois

    The wealth of the state mainly arises from this abundance of soil and the favorable agrarian conditions it provides. Illinois is a major coal-producing state. Much of the bedrock surface is of Pennsylvanian age, including "cyclothemes", regular sequences of limestone, shale and coal layers. Newer rocks may have once existed in the State, but ...

  9. Arkansas - Wikipedia

    en.wikipedia.org/wiki/Arkansas

    Arkansas (/ ˈ ɑːr k ən s ɔː / ⓘ AR-kən-saw [c]) is a landlocked state in the West South Central region of the Southern United States. [9] [10] It borders Missouri to the north, Tennessee and Mississippi to the east, Louisiana to the south, Texas to the southwest, and Oklahoma to the west.