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) - 19:08, 17 June 2024
Knox Supergroup (redirect from Chepultepec Formation)
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) - 15:18, 30 August 2024
Embayment Megagroup (redirect from Clayton Formation)
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
Pope Mega Group (redirect from Tar Springs Formation)
Kinkaid formation to the west. Mt. Pleasant Sandstone, Bristow Sandstone, and Siberia Limestone. The Siberia is a thin tongue of the Menard formation. This...
8 KB (653 words) - 13:04, 8 July 2024
Hunton Megagroup (redirect from Moccasin Springs Formation)
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
Carbondale Group (redirect from Petersburg Formation)
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
Muscatatuck Group (redirect from Beechwood Formation)
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
Munising Group (redirect from Kerbal Formation)
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 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
St. Peter Sandstone (redirect from St. Peter Formation)
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