| Freda Sandstone Stratigraphic range: Proterozoic | |
|---|---|
| Type | Formation |
| Underlies | Jacobsville Sandstone |
| Overlies | Nonesuch Shale |
| Lithology | |
| Primary | sandstone |
| Other | mudstone, shale |
| Location | |
| Region | Michigan and Wisconsin |
| Country |  United States |
The Freda Sandstone is a geologic formation in Michigan. It dates back to the Proterozoic. Lithologically, the Freda Sandstone is a lithic, red-brown, cyclic sequence of sandstones, mudstones and shales (conglomerates are rare).
The Waverly Group is a geologic group in Michigan and Ohio. It preserves fossils dating back to the Carboniferous period.
The Saginaw Group is a geologic group in Michigan composed of sedimentary rock deposited during the Pennsylvanian Period (circa 323.2 million years ago to 298.9 million years ago. Saginaw group rocks include sandstone, shale, coal, and limestone of fresh water, brackish, and marine origin. Fossils dating back to the Penssylvanian Period can be found in Saginaw Group formations.
The Waverly Sandstone is a geologic formation in Michigan. It preserves fossils dating back to the Carboniferous period.
The Cordell Formation is a geologic formation in Michigan. It preserves fossils dating back to the Silurian period.
The Hinton Formation is a geologic formation in West Virginia. It preserves fossils dating back to the Carboniferous period. It is mainly made up of limestone, sandstone, and shale.
The Oriskany Sandstone is a Middle Devonian age unit of sedimentary rock found in eastern North America. The type locality of the unit is located at Oriskany Falls in New York. The Oriskany Sandstone extends throughout much of the Appalachian Basin.
The Keefer Sandstone is a geologic formation in West Virginia. It preserves fossils dating back to the Silurian period.
The Williamsport Sandstone is a sandstone geologic formation in West Virginia, Virginia, Pennsylvania, and Maryland. the formation includes the Cedar Creek Limestone member. Near Cumberland, Maryland it includes the Cedar Creek Limestone member. It preserves fossils dating back to the Silurian period.
The Washington Formation is a coal, sandstone, and limestone geologic formation in West Virginia. It preserves fossils dating back to the Permian period.
The Sylvania Sandstone is a geologic formation in Ohio and Michigan. Its type locality is Sylvania, Ohio. It preserves fossils dating back to the Devonian period.
The Java Formation is a geologic formation in Kentucky, New York, Ohio, Pennsylvania, Tennessee, Virginia, West Virginia. It preserves fossils dating back to the Devonian period. The formation comprises the Pipe Creek Shale, Wiscoy Sandstone Member in New York, and Hanover Shale Member except in Tennessee.
The Franconia Formation is a geologic formation in the upper mid-western United States, with outcroppings found in Illinois, Indiana, Iowa, Michigan, Minnesota, Missouri, Ohio, and Wisconsin. It preserves fossils dating back to the Cambrian period. It was named the Franconia Formation due to the first published documentation of exposures in vicinity of Franconia, Minnesota in the 1897 Ph.D. dissertation by Charles P. Berkley at the University of Minnesota titled Geology of the St. Croix Dalles. The Franconian stratigraphic stage was named after this formation.
The Jordan Sandstone is a geologic formation in Wisconsin. It preserves fossils dating back to the Cambrian period.
The Everton Formation is a geologic formation in northern Arkansas that dates to the middle Ordovician Period. Unconformities separate this formation from the underlying Powell Formation and the overlying St. Peter Sandstone Formation. Named for the town of Everton in Boone County, Arkansas in 1907, the Everton Formation is composed primarily of dolomite, limestone, and sandstone.
The Harding Sandstone is a geologic formation in Colorado. It preserves fossils dating back to the Ordovician period.
The Maroon Formation is a geologic formation in Colorado. It preserves fossils dating back to the Permian period. It is the primary formation of sandstone that lends the vivid red color to the hills around Glenwood Springs, Colorado.
The Bois Blanc Formation is a geologic formation in Michigan. It preserves fossils dating back to the Devonian period.
The Marshall Sandstone is a geologic formation in Michigan. It preserves fossils dating back to the Mississippian period.
The Parma Sandstone is a geologic formation in Michigan. It preserves fossils dating back to the Carboniferous period.
The Princeton Sandstone is a geologic formation in West Virginia. It preserves fossils dating back to the Carboniferous period.
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