• The Amherstburg Formation is a geologic formation in Ontario, Canada and Michigan, United States. It preserves fossils dating back to the Devonian period...
    2 KB (62 words) - 21:33, 18 June 2024
  • Thumbnail for Onondaga Limestone
    the right). To the west and north these rocks are known as the Amherstburg Formation of the Detroit River Group. Northwest of Ingersol and Woodstock...
    13 KB (1,332 words) - 03:43, 15 June 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...
    9 KB (846 words) - 22:56, 9 April 2024
  • Thumbnail for Salina Group
    The Salina Group or Salina Formation is a Late Silurian-age, Stratigraphic unit of sedimentary rock that is found in Northeastern and Midwestern North...
    14 KB (1,300 words) - 01:07, 7 March 2024
  • Thumbnail for Jacobsville Sandstone
    Jacobsville Sandstone is a red sandstone formation, marked with light-colored streaks and spots, primarily found in northern Upper Michigan, portions...
    43 KB (4,105 words) - 15:00, 28 January 2024
  • The Ionia Formation is a geologic formation in Michigan. It preserves fossils dating back to the Jurassic period. Earth sciences portal Michigan portal...
    1 KB (44 words) - 18:48, 6 March 2024
  • The Bush Bay Formation is a geologic formation in Michigan. It preserves fossils dating back to the Silurian period. Earth sciences portal Michigan portal...
    1 KB (45 words) - 03:09, 7 March 2024
  • The Byron Formation is a geologic formation in Michigan and Wisconsin. It preserves fossils dating back to the Silurian period. Earth sciences portal...
    2 KB (58 words) - 16:59, 10 February 2024
  • The Grand River Formation is a geologic formation in Michigan. It preserves fossils dating back to the Pennsylvanian period. Earth sciences portal Michigan...
    2 KB (53 words) - 13:43, 17 June 2024
  • The Rockview Formation is a geologic formation in Michigan. It preserves fossils dating back to the Silurian period. Earth sciences portal Michigan portal...
    1 KB (44 words) - 03:01, 7 March 2024
  • The Rapson Creek Formation is a geologic formation in Michigan. It preserves fossils dating back to the Silurian period. Earth sciences portal Michigan...
    1 KB (45 words) - 02:56, 7 March 2024
  • The Lime Island Formation is a geologic formation in Michigan. It preserves fossils dating back to the Silurian period. Earth sciences portal Michigan...
    1 KB (55 words) - 18:17, 12 February 2024
  • The Saginaw Formation is a geologic formation in Michigan. It preserves fossils dating back to the Pennsylvanian period. Earth sciences portal Michigan...
    1 KB (44 words) - 18:49, 6 March 2024
  • The Stonington Formation is a geologic formation in Michigan. It preserves fossils dating back to the Ordovician period. Earth sciences portal Michigan...
    2 KB (51 words) - 03:00, 7 March 2024
  • Thumbnail for Lucas Formation
    The Lucas Formation is a geologic formation in Michigan. It preserves fossils dating back to the Devonian period. McCall, Christian R (16 October 2018)...
    2 KB (60 words) - 03:11, 7 March 2024
  • Thumbnail for Black River Group
    areas where this Geologic Unit thins it is also called the Black River Formation (undifferentiated). One example of this is over the Cincinnati Arch &...
    9 KB (709 words) - 05:14, 4 January 2024
  • Thumbnail for Essex County, Ontario
    county in Southwestern Ontario, Canada comprising seven municipalities: Amherstburg, Kingsville, Lakeshore, LaSalle, Leamington, Tecumseh and the administrative...
    34 KB (2,719 words) - 14:24, 30 June 2024
  • The Ferron Point Formation is a geologic formation in Michigan. It preserves fossils dating back to the Devonian period. Earth sciences portal Michigan...
    2 KB (55 words) - 09:19, 18 March 2024
  • The Hendricks Formation is a geologic formation in Michigan. It preserves fossils dating back to the Silurian period. Earth sciences portal Michigan portal...
    1 KB (44 words) - 03:00, 7 March 2024
  • Thumbnail for Trenton Group
    Amherstburg Formation Anderdon Limestone Bell Shale Bois Blanc Formation Dundee Limestone Ferron Point Formation Long Lake Limestone Lucas Formation Rockport...
    3 KB (137 words) - 06:23, 9 February 2024
  • The Garden Island Formation is a geologic formation in Michigan. It preserves fossils dating back to the Devonian period. Earth sciences portal Michigan...
    2 KB (56 words) - 02:20, 20 May 2024
  • The Pointe aux Chenes Formation is a geologic formation in Michigan, USA. It preserves fossils dating back to the Silurian period. Earth sciences portal...
    1 KB (47 words) - 03:00, 7 March 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 (1,220 words) - 05:59, 31 March 2024
  • The Dundee Limestone is a geologic formation in Michigan, Ohio and Ontario. It preserves fossils dating back to the Devonian period. Earth sciences portal...
    2 KB (54 words) - 02:57, 7 March 2024
  • Thumbnail for Berea Sandstone
    Berea Sandstone (category Geologic formations of Michigan)
    Berea Sandstone, also known as Berea Grit, is a sandstone formation in the U.S. states of Michigan, Ohio, Pennsylvania, West Virginia, and Kentucky. It...
    11 KB (1,065 words) - 13:39, 13 October 2023
  • The Schoolcraft Formation is a geologic formation in Michigan. It preserves fossils dating back to the Silurian period. Earth sciences portal Michigan...
    1 KB (44 words) - 17:55, 13 February 2024
  • Thumbnail for Au Train Formation
    The Au Train Formation is a geologic formation in Michigan. It preserves fossils dating back to the Ordovician period. Earth sciences portal Michigan...
    2 KB (67 words) - 14:28, 10 February 2024
  • Bertie Limestone, also referred to as the Bertie Dolomite and the Bertie Formation, is an upper Silurian (Pridoli, or Cayugan) geologic group and Lagerstätte...
    33 KB (1,824 words) - 19:36, 8 July 2024
  • The Cordell Formation is a geologic formation in Michigan. It preserves fossils dating back to the Silurian period. Earth sciences portal Michigan portal...
    2 KB (72 words) - 03:10, 7 March 2024
  • The Bois Blanc Formation is a geologic formation in Michigan. It preserves fossils dating back to the Devonian period. Earth sciences portal Michigan...
    2 KB (48 words) - 02:56, 7 March 2024