• 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 portal...
    2 KB (67 words) - 14:28, 10 February 2024
  • Thumbnail for Munising Formation
    Implications of Lower Ordovician Conodonts from the Munising and Au Train Formations at Pictured Rocks National Lakeshore, Upper Peninsula of Michigan"...
    4 KB (245 words) - 21:13, 20 July 2024
  • The Black River Formation is a geologic formation in Quebec, Canada and Michigan, United States. It preserves fossils dating back to the Ordovician period...
    2 KB (78 words) - 23:32, 8 September 2024
  • Thumbnail for Pictured Rocks National Lakeshore
    Pictured Rocks National Lakeshore (category Rock formations of Michigan)
    a cap over the other layers is the hard sandstone of the younger Au Train Formation from the Ordovician Period. Streaks on the face of the cliffs come...
    25 KB (2,372 words) - 11:53, 29 June 2024
  • Thumbnail for Munising Group
    Implications of Lower Ordovician Conodonts from the Munising and Au Train Formations at Pictured Rocks National Lakeshore, Upper Peninsula of Michigan"...
    10 KB (853 words) - 14:19, 3 September 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 Ionia Formation is a geologic formation in Michigan. It preserves fossils dating back to the Jurassic period. Earth sciences portal Michigan portal...
    1 KB (52 words) - 05:00, 12 September 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
  • 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 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
  • 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 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 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 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
  • The Cordell Formation is a geologic formation in Michigan. It preserves fossils dating back to the Silurian period. "Michigan Basin Stratigraphy on ResearchGate"...
    2 KB (56 words) - 18:24, 13 August 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 Hendricks Formation is a geologic formation in Michigan. It preserves fossils dating back to the Silurian period. Earth sciences portal Michigan portal...
    1 KB (52 words) - 04:24, 28 July 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 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
  • 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 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 (4,137 words) - 20:04, 20 July 2024
  • 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
  • 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
  • Bayport Limestone (category Midwestern United States geologic formation stubs)
    The Bayport Limestone is a geologic formation in Michigan. It preserves fossils dating back to the Mississippian period. Earth sciences portal Michigan...
    1 KB (44 words) - 18:50, 6 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
  • Thumbnail for Jordan Formation
    lateral equivalents of the Jordan Formation include the Eminence Dolostone of the Illinois Basin, the Au Train Formation of the northern Michigan Basin,...
    19 KB (1,816 words) - 07:05, 10 July 2023
  • The Rogers City Formation is a geologic formation in Michigan. It preserves fossils dating back to the Devonian period. Earth sciences portal Michigan...
    1 KB (45 words) - 14:48, 13 February 2024
  • The Alpena Formation is a geologic formation in Michigan. It preserves fossils dating back to the Devonian period. Earth sciences portal Michigan portal...
    1 KB (44 words) - 03:01, 7 March 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 (1,902 words) - 06:08, 17 July 2024