| Lehman Formation | |
|---|---|
| Stratigraphic range: Ordovician | |
| Type | Formation |
| Unit of | Pogonip Group |
| Underlies | Eureka Quartzite |
| Overlies | Kanosh Shale |
| Lithology | |
| Primary | Shale, quartzite, limestone |
| Location | |
| Region | Great Basin [1] |
| Country |  United States |
| Type section | |
| Named for | Lehman Caves |
| Named by | Lehi Hintze |
| Year defined | 1951 [2] |
The Lehman Formation is a geologic formation in Utah. It preserves fossils dating back to the Ordovician period. [3]
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 Golconda Formation is a geologic formation in Kentucky. It preserves fossils dating back to the Carboniferous period. In Indiana, the Golconda, it is called the Golconda Limestone and is part of the Stephensport Group.
The Oranda Formation is a geologic formation in Virginia. It preserves fossils dating back to the Ordovician period.
The Monmouth Formation is a geologic formation in Prince George's County, Maryland. It preserves fossils dating back to the Cretaceous period.
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 Ada Formation is a geologic formation in Oklahoma, within and to west of Ada. It consist mainly of shale with numerous limestone layers which get thinner and eventually disappear to the south, where they are replaced by fine-grained sandstone. Fossils are rare. Disarticulated remains of Eryops, Diasparactus, and Ophiacodon from the Ada Formation represent the first finds of these genera in Oklahoma.
The Sawatch Formation is a geologic formation in eastern Colorado. It is a sedimentary sequence formed approximately 530 million years ago during a marine transgression. It preserves fossils dating back to the Cambrian period. It is composed of glauconitic and quartz-rich sandstone.
The Nopah Formation is a geologic formation in Utah. It preserves fossils dating back to the Cambrian period.
The Notch Peak Formation is a geologic formation in Utah. It preserves fossils dating back to the Cambrian period.
The Pioche Formation is a geologic formation in Utah and Nevada. It preserves fossils dating back to the Cambrian period.
The Dunderberg Shale is a geologic formation in Nevada and Utah.
The Hermosa Group is a group of geologic formations in Utah and Colorado. It preserves fossils dating back to the Carboniferous period.
The Honaker Trail Formation is a geologic formation in Utah. It preserves fossils dating back to the Carboniferous period.
The Stump Formation is a geologic formation in Utah and Wyoming. It preserves fossils dating back to the Jurassic period.
The Fillmore Limestone is a geologic formation in Utah. It preserves fossils dating back to the Ordovician period.
The Arcturus Formation is a geologic formation in Nevada and Utah, United States. It preserves fossils dating back to the Permian period.
The Plympton Formation is a geologic formation in Utah. It preserves fossils dating back to the Permian period.
The Elephant Canyon Formation is the basal Permian geologic formation of the Cutler Group overlying an unconformity on the Pennsylvanian Honaker Trail Formation in the Paradox Basin of southern Utah.
The Kanosh Formation is a geologic formation in Utah and Nevada. It preserves fossils dating back to the Middle Ordovician period.
The Puget Group is a geologic group in Washington (state). It preserves fossils dating back to the Paleogene period.
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