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  • Main Page
    ...age is based on historical unit descriptions from either ISGS Bulletin 94, 95, or 104 (see [[Illinois_Stratigraphy:About|About ILSTRAT]]). However, this ::[[Search:Quaternary System|Quaternary System]]
    4 KB (531 words) - 22:04, 31 August 2023
  • Elviran Stage
    |category2=Mississippian Subsystem |tree22=Mississippian Subsystem
    2 KB (291 words) - 15:59, 13 January 2017
  • Hombergian Stage
    |category2=Mississippian Subsystem |tree22=Mississippian Subsystem
    3 KB (339 words) - 16:32, 13 January 2017
  • Knobs Megagroup
    |category2=Devonian System |category3=Mississippian Subsystem
    3 KB (376 words) - 21:02, 5 January 2017
  • Mississippian Subsystem
    |category2=Mississippian Subsystem |tree22=Mississippian Subsystem
    10 KB (1,390 words) - 15:54, 13 January 2017
  • Kinderhookian Series
    |category2=Mississippian Subsystem |tree22=Mississippian Subsystem
    5 KB (699 words) - 22:57, 18 January 2017
  • Hardinsburg Sandstone
    |category2=Mississippian Subsystem |tree22=Mississippian Subsystem
    4 KB (536 words) - 22:36, 13 January 2017
  • Valmeyeran Series
    |category2=Mississippian Subsystem |tree22=Mississippian Subsystem
    6 KB (819 words) - 22:40, 17 January 2017
  • Pope Megagroup
    |category2=Mississippian Subsystem |tree22=Mississippian Subsystem
    3 KB (446 words) - 16:00, 13 January 2017
  • Absaroka Sequence
    ...ndbook of Illinois Stratigraphy: Illinois State Geological Survey Bulletin 95, 261 p. ...ystem, and its top is the major unconformity at the base of the Cretaceous System (Swann and Willman, 1961).
    4 KB (561 words) - 22:48, 19 January 2017
  • North Hill Group
    |category2=Mississippian Subsystem |tree22=Mississippian Subsystem
    3 KB (421 words) - 16:50, 19 January 2017
  • Kaskaskia Sequence
    |category2=Devonian System |tree22=Devonian System
    3 KB (351 words) - 20:59, 5 January 2017
  • Louisiana Limestone
    |category2=Devonian System |tree22=Devonian System
    4 KB (569 words) - 17:18, 11 January 2017
  • Palestine Sandstone
    |category2=Mississippian Subsystem |tree22=Mississippian Subsystem
    4 KB (481 words) - 16:28, 13 January 2017
  • Chesterian Series
    |category2=Mississippian Subsystem |tree22=Mississippian Subsystem
    7 KB (1,034 words) - 15:54, 13 January 2017
  • Paleozoic Erathem
    ...ndbook of Illinois Stratigraphy: Illinois State Geological Survey Bulletin 95, 261 p. ...definition of the name was expanded in 1840 to include the Carboniferous (Mississippian and Pennsylvanian) and Permian Systems (Phillips, 1840), and present usage
    5 KB (689 words) - 15:39, 11 January 2017
  • New Albany Shale Group
    |category2=Devonian System |category3=Mississippian Subsystem
    5 KB (722 words) - 17:07, 22 October 2019
  • Babylon Sandstone Member
    ...ndbook of Illinois Stratigraphy: Illinois State Geological Survey Bulletin 95, 261 p. ...is the lowest unit of the Pennsylvanian System and unconformably overlies Mississippian limestones.
    3 KB (328 words) - 22:08, 27 January 2017
  • Saverton Shale
    |category2=Devonian System |tree22=Devonian System
    4 KB (584 words) - 17:19, 11 January 2017
  • Blocher Shale
    |category2=Devonian System |tree22=Devonian System
    3 KB (449 words) - 17:50, 11 January 2017
  • Devonian System
    |category2=Devonian System |tree22=Devonian System
    10 KB (1,478 words) - 17:18, 11 January 2017
  • Cypress Sandstone
    |category2=Mississippian Subsystem |tree22=Mississippian Subsystem
    4 KB (640 words) - 20:03, 21 October 2019
  • Baylis Formation
    |category2=Cretaceous System |tree22=Cretaceous System
    3 KB (482 words) - 17:09, 11 January 2017
  • Grassy Creek Shale
    |category2=Devonian System |tree22=Devonian System
    4 KB (626 words) - 17:20, 11 January 2017
  • Sweetland Creek Shale
    |category2=Devonian System |tree22=Devonian System
    4 KB (605 words) - 17:20, 11 January 2017
  • Cretaceous System
    |category2=Cretaceous System |tree22=Cretaceous System
    9 KB (1,353 words) - 16:29, 11 January 2017
  • Grand Tower Limestone
    |category2=Devonian System |tree22=Devonian System
    6 KB (817 words) - 19:34, 22 October 2019
  • Pennsylvanian Subsystem
    ...ndbook of Illinois Stratigraphy: Illinois State Geological Survey Bulletin 95, 261 p. ...in Illinois until about 50 years ago and since then has been regarded as a system (fig . P-2).
    24 KB (3,539 words) - 16:05, 20 January 2017
  • Historical:Pennsylvanian System
    ...in Illinois until about 50 years ago and since then has been regarded as a system (fig . P-2). Strata of the Pennsylvanian System constitute the bedrock in about two-thirds of the area of Illinois (36,806
    24 KB (3,468 words) - 22:19, 19 January 2017
  • Historical:Pennsylvanian Subsystem
    ...in Illinois until about 50 years ago and since then has been regarded as a system (fig . P-2). Strata of the Pennsylvanian System constitute the bedrock in about two-thirds of the area of Illinois (36,806
    24 KB (3,468 words) - 16:01, 20 January 2017
  • Carbondale Formation
    ...22, Pennsylvanian Subsystem in Illinois: Illinois State Geological Survey, Bulletin (in press). ...of this basin resist being divided into formation-sized units. Unlike the Mississippian (for example), the Pennsylvanian lacks large, mappable bodies of rock that
    21 KB (3,121 words) - 16:14, 9 February 2022
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