• The Fern Glen Formation is a geologic formation in eastern and southeastern Missouri. It preserves fossils dating back to the Osagean Series of the Mississippian...
    2 KB (128 words) - 07:13, 18 November 2024
  • Thumbnail for Boone Formation
    southwest Missouri include the Pierson Limestone, Fern Glen Formation, Reeds Spring Formation, Elsey Formation (including the Grand Falls Chert), Burlington...
    3 KB (204 words) - 17:03, 18 July 2023
  • producing formation in Illinois. Estimated to have accounted for more than 60% of the oil production in the state. The Glen Dean Formation is a geologic...
    8 KB (653 words) - 13:04, 8 July 2024
  • quartz pebbles, as well as a matrix of quartz sand. The Wilcox Formation is a sand formation that is part of the Embayment Megagroup. It runs from southern...
    5 KB (509 words) - 18:46, 25 April 2024
  • use. The Petersburg formation also contains sandstone members that are used as aquifers. The Linton Formation is a geologic formation in Indiana. It is...
    4 KB (300 words) - 14:02, 30 April 2024
  • Thumbnail for St. Peter Sandstone
    The St. Peter Sandstone is an Ordovician geological formation. It belongs to the Chazyan stage of the Champlainian series in North American regional stratigraphy...
    6 KB (547 words) - 19:53, 20 August 2024
  • underlies the Antrim Shale. The North Vernon Limestone is a geologic formation in Indiana. Also called the Sellersburg Limestone, this term however is...
    4 KB (221 words) - 14:31, 31 July 2024
  • Thumbnail for Knox Supergroup
    The Knox Supergroup, also known as the Knox Group and the Knox Formation, is a widespread geologic group in the Southeastern United States. The age is...
    15 KB (1,191 words) - 21:36, 27 November 2024
  • The Hunton Megagroup also Hunton Super Group, Hunton Group, Hunton Formation and Hunton Limestone is predominantly composed of carbonate rock, deposited...
    14 KB (1,196 words) - 08:20, 14 September 2024
  • Thumbnail for Paoli Formation
    The Paoli Formation, Paoli Limestone, or Paoli Chert is a geologic formation in Indiana, Illinois, Kentucky and Missouri. This formation contains members...
    3 KB (176 words) - 23:11, 28 February 2024
  • Thumbnail for Davis Formation
    The Davis Formation is a geologic formation in Indiana and Missouri. It preserves fossils dating back to the Cambrian period. Paleontology portal List...
    3 KB (124 words) - 06:59, 18 November 2024
  • Thumbnail for Eau Claire Formation
    The Eau Claire Formation is a geologic formation in the north central United States. It preserves trilobite fossils from the Cambrian Period. Paleontology...
    3 KB (94 words) - 07:06, 18 November 2024
  • The Leemon Formation is a geologic formation in Missouri. It preserves fossils dating back to the Ordovician period. Earth sciences portal United States...
    1 KB (58 words) - 07:44, 18 November 2024
  • Thumbnail for Mifflin Formation
    The Mifflin Formation is a fossil bearing geologic formation in Illinois dating to the Ordovician period. Earth sciences portal Illinois portal Paleontology...
    1 KB (49 words) - 08:09, 18 November 2024
  • Harmony Group is located in the State of Indiana. It is made up of three formations, the Grassy Knob Chert, the Backbone Limestone and Clear Creek Chert....
    3 KB (282 words) - 18:01, 7 March 2024
  • Thumbnail for Munising Group
    The Munising Group or Formation is a 1,700 feet (520 m) thick, white to light grey Cambrian sedimentary unit that crops out in Michigan and (to a lesser...
    10 KB (853 words) - 16:55, 27 October 2024
  • The Franconia Formation is a geologic formation in the upper mid-western United States, with outcroppings found in Illinois, Indiana, Iowa, Michigan,...
    3 KB (199 words) - 07:15, 18 November 2024
  • The Paint Creek Formation is a geologic formation in Illinois. It preserves fossils dating back to the Carboniferous period. Earth sciences portal Illinois...
    1 KB (52 words) - 08:23, 18 November 2024
  • The Mattoon Formation is a geologic formation in Illinois. It preserves fossils dating back to the Carboniferous period. List of fossiliferous stratigraphic...
    1 KB (38 words) - 08:05, 18 November 2024
  • The Patoka Formation is a geologic formation in Illinois. It preserves fossils dating back to the Carboniferous period. List of fossiliferous stratigraphic...
    1 KB (44 words) - 08:28, 18 November 2024
  • The Quimbys Mill Formation is a geologic formation in Illinois. It preserves fossils dating back to the Ordovician period. Earth sciences portal Illinois...
    1 KB (52 words) - 08:43, 18 November 2024
  • The St. Laurent Formation is a geologic formation in Illinois. It preserves fossils dating back to the Devonian period. Earth sciences portal Illinois...
    1 KB (52 words) - 09:02, 18 November 2024
  • The Dubuque Formation is a geologic formation in Illinois, Iowa, Wisconsin and Minnesota. It preserves fossils dating back to the Ordovician period. List...
    1 KB (53 words) - 19:43, 20 July 2024
  • The Nachusa Formation is a geologic formation in Illinois. It preserves fossils dating back to the Ordovician period. Earth sciences portal Illinois portal...
    1 KB (51 words) - 08:14, 18 November 2024
  • The Grand Detour Formation is a geologic formation in Illinois. It preserves fossils dating back to the Ordovician period. Earth sciences portal Illinois...
    1 KB (60 words) - 07:21, 18 November 2024
  • The Mosalem Formation is a geologic formation in Illinois. It preserves fossils dating back to the Silurian period. Earth sciences portal Illinois portal...
    1 KB (51 words) - 08:12, 18 November 2024
  • Thumbnail for Shelburn Formation
    The Shelburn Formation is a geologic formation in Indiana. It preserves fossils dating back to the Carboniferous period. Earth sciences portal Indiana...
    1 KB (51 words) - 08:55, 18 November 2024
  • Thumbnail for Neda Formation
    The Neda Formation is a geologic formation in Illinois. It preserves fossils dating back to the Ordovician period. Earth sciences portal Illinois portal...
    1 KB (51 words) - 08:15, 18 November 2024
  • The Pecatonica Formation is a geologic formation in Illinois. It preserves fossils dating back to the Ordovician period. List of fossiliferous stratigraphic...
    1 KB (44 words) - 08:28, 18 November 2024
  • Thumbnail for Bond Formation
    The Bond Formation is a geologic formation in Illinois, Kentucky and Indiana. It preserves fossils dating back to the Carboniferous period. List of fossiliferous...
    2 KB (47 words) - 06:34, 18 November 2024