• Thumbnail for Arnheim Formation
    The Arnheim Formation is a geologic formation in Ohio. It preserves fossils dating back to the Ordovician period. Earth sciences portal Ohio portal Paleontology...
    2 KB (80 words) - 14:27, 10 February 2024
  • Thumbnail for Marcellus Formation
    The Marcellus Formation or the Marcellus Shale is a Middle Devonian age unit of sedimentary rock found in eastern North America. Named for a distinctive...
    102 KB (10,675 words) - 23:40, 16 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 (1,220 words) - 22:19, 3 August 2024
  • Thumbnail for Onondaga Limestone
    it outcrops; in others, especially its Southern Ontario portion, the formation can be less prominent as a local surface feature.[citation needed] In...
    13 KB (1,332 words) - 03:43, 15 June 2024
  • The Kerbel Formation is a geologic formation in Ohio. It dates back to the Cambrian. Earth sciences portal Ohio portal Paleontology portal Generalized...
    1 KB (30 words) - 07:55, 11 August 2024
  • Thumbnail for Isotelus
    Isotelus (category Bromide Formation)
    I. maximus, Arnheim Formation, Ohio. Note the long head spines....
    8 KB (736 words) - 09:02, 18 June 2024
  • Thumbnail for Cuyahoga Formation
    has media related to Cuyahoga Formation. The Cuyahoga Formation is a geologic formation in Ohio. The age of the formation is difficult to determine, because...
    4 KB (175 words) - 17:00, 16 May 2024
  • The Rhinestreet Shale is a geologic formation in the Appalachian Basin. It dates back to the Devonian period. The Rhinestreet is an organic or Black Shale...
    3 KB (212 words) - 20:03, 25 May 2024
  • Thumbnail for Cincinnati Arch
    as Fernvale and Arnheim. Formations can be a part of only one stage or in multiple stages depending on how old they are. Formations can also be represented...
    8 KB (857 words) - 16:34, 8 March 2024
  • Thumbnail for Stromatoporoidea
    known from the Chazy Group of eastern North America and the Machiakou Formation of North China. Labechiids were by far the most diverse stromatoporoids...
    45 KB (4,761 words) - 13:32, 26 January 2024
  • Thumbnail for Monongahela Formation
    The Monongahela Formation is a geologic formation in West Virginia, Pennsylvania, Ohio, and Maryland. It is dated to the Carboniferous period. The top...
    3 KB (154 words) - 23:53, 22 February 2024
  • Thumbnail for Pottsville Formation
    The Pennsylvanian Pottsville Formation is a mapped bedrock unit in Pennsylvania, western Maryland, West Virginia, Ohio, and Alabama. It is a major ridge-former...
    9 KB (767 words) - 13:23, 27 March 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 (60 words) - 19:08, 16 July 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 Queenston Formation
    The Queenston Formation is a geological formation of Upper Ordovician age (Maysvillian to Richmondian Stage), which outcrops in Ontario, Canada (along...
    10 KB (848 words) - 05:27, 9 June 2023
  • Thumbnail for West Falls Group
    the Portage Group. The West Falls formation is bounded above by the Java Formation and below by the Sonyea Formation. It comprises the Angola Shale and...
    6 KB (459 words) - 18:52, 25 May 2024
  • Thumbnail for Silica Formation
    The Silica Formation is a geologic formation in Michigan. It preserves fossils dating back to the Devonian period. Earth sciences portal Michigan portal...
    2 KB (44 words) - 03:12, 7 March 2024
  • Thumbnail for Waynesville Formation
    The Waynesville Formation is a geologic formation in Ohio and Indiana. It preserves fossils from the Late Ordovician period. Earth sciences portal Indiana...
    2 KB (64 words) - 08:45, 14 February 2024
  • Thumbnail for Liberty Formation
    The Liberty Formation is a geologic formation in Ohio and Indiana. It preserves fossils dating back to the Ordovician period. Earth sciences portal Ohio...
    2 KB (65 words) - 07:47, 13 February 2024
  • Thumbnail for Grant Lake Formation
    The Grant Lake Formation is a geologic formation in Ohio and Kentucky. It preserves fossils dating back to the Ordovician period. Earth sciences portal...
    2 KB (75 words) - 00:55, 18 June 2024
  • The Dayton Formation is a geologic formation in Ohio. It dates back to the Silurian. Earth sciences portal Ohio portal Paleontology portal Generalized...
    1 KB (30 words) - 20:17, 14 July 2019
  • The Bisher Formation is a geologic formation in Ohio. It preserves fossils dating back to the Silurian period. Earth sciences portal Ohio portal Paleontology...
    1 KB (63 words) - 03:00, 7 March 2024
  • The Conasauga Formation is a geologic formation in Georgia. It preserves fossils dating back to the Cambrian period. Earth sciences portal Paleontology...
    2 KB (68 words) - 10:28, 11 February 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 Lilley Formation is a geologic formation in Ohio. It preserves fossils dating back to the Silurian period. Earth sciences portal Ohio portal Paleontology...
    1 KB (51 words) - 18:17, 12 February 2024
  • Thumbnail for Drakes Formation
    The Drakes Formation is a geologic formation in Kentucky. It preserves fossils dating back to the Ordovician period . Earth sciences portal United States...
    2 KB (52 words) - 23:13, 12 February 2024
  • The Saluda Formation is a geologic formation in Ohio and Indiana. It preserves fossils dating back to the Ordovician period. Earth sciences portal Indiana...
    2 KB (65 words) - 03:14, 7 March 2024
  • Thumbnail for Trenton Group
    Upper Arnheim Formation Cincinnati Group Drakes Formation Fairview Formation Grant Lake Formation Kope Formation Liberty Formation Miamitown Shale Queenston...
    3 KB (137 words) - 06:23, 9 February 2024
  • Thumbnail for Point Pleasant Formation
    The Point Pleasant Formation is a geologic formation in Ohio. It dates back to the Middle Ordovician. Earth sciences portal Ohio portal Paleontology portal...
    2 KB (34 words) - 00:28, 17 February 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