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Purington Shale

                                               

Ridenhower Formation

                                               

Sandia Formation

The Sandia Formation is a geologic formation in New Mexico. The formation was first named by C.L. Herrick in 1900 for exposures in the Sandia Mountains of New Mexico. It is also found in the Jemez, Sangre de Cristo, and Manzano Mountains as well ...

                                               

Sturgis Formation

                                               

Verdigris Formation

The Verdigris Formation is a geologic formation that outcrops in Illinois. It preserves fossils dating back to the Carboniferous period. It is a limestone that was deposited after the Skinner Sandstone in central Oklahoma.

                                               

Waltersburg Formation

                                               

Akron Formation

The Akron Formation is a geologic formation in New York. It preserves fossils dating back to the Silurian period. The Akron Formation is primarily a mottled dolomite. Type section is at Murder Creek, Akron Falls, Akron, New York.

                                               

Chrysler Formation

                                               

Cobleskill Formation

                                               

Decker Formation

                                               

Eramosa Formation

                                               

Gasport Limestone

                                               

Grimsby Formation

                                               

Guelph Formation

                                               

Herkimer Formation

                                               

Ilion Formation

                                               

Irondequoit Limestone

                                               

Joslin Hill Formation

                                               

Kirkland Formation

                                               

Maplewood Formation

                                               

Neahga Formation

                                               

Oak Orchard Formation

                                               

Oneida Formation

                                               

Power Glen Shale

                                               

Reynales Formation

                                               

Rockway Formation

                                               

Sauquoit Formation

                                               

Sodus Formation

                                               

Syracuse Formation

                                               

Thorold Formation

                                               

Westmoreland Formation

                                               

Willowvale Formation

                                               

Wolcott Limestone

                                               

Naobaogou Formation

The Naobaogou Formation is a geological formation in the Daqing Mountains of China. It is of Lopingian age. It consists of three rhythms of sediment, labelled members I-III primarily of purple siltstone, but each with a thick basal conglomerate. ...

                                               

Exeter Group

The Exeter Group is a Permian lithostratigraphic group which occurs through East Devon in southwest England. The name is derived from the city of Exeter in Devon which is partly underlain by rocks of this age.

                                               

Coconino Sandstone

Coconino Sandstone is a geologic formation named after its exposure in Coconino County, Arizona. This formation spreads across the Colorado Plateau province of the United States, including northern Arizona, northwest Colorado, Nevada, and Utah. T ...

                                               

Lyons Formation

Lyons Sandstone is a geological layer formed during the Paleozoic Era, Middle Permian Period about 250 million years ago. This layer is also referred to as the Lyons Formation. It is the result of fine-grained quartz sand dunes compressing into s ...

                                               

Cutler Formation

                                               

Caves of the Three Counties System

                                               

Castle Hayne Limestone

The Castle Hayne Limestone is a geologic formation in North Carolina. It consists of cobble to pebble sized clasts, usually rounded, coated with phosphate and glauconite in a limestone matrix. The Castle Hayne Limestone is known for containing fo ...

                                               

Galena Limestone

                                               

Kaibab Limestone

The Kaibab Limestone is a resistant cliff-forming, Permian geologic formation that crops out across the U.S. states of northern Arizona, southern Utah, east central Nevada and southeast California. It is also known as the Kaibab Formation in Ariz ...

                                               

Ocala Limestone

Period: Paleogene Epoch: Late Eocene Faunal stage: Late Clarkforkian through early Orellan Absolute Age: ~55.8 to ~33.9 mya, calculates to a period of approximately 21.9 million years

                                               

Platteville Limestone

Platteville Limestone is the Ordovician limestone formation in the sedimentary sequence characteristic of the upper Midwestern United States. It is characterized by its gray color, rough texture, and numerous fossils. Its type locality is Plattev ...

                                               

Suwannee Limestone

The Suwannee Limestone overlies the Ocala Limestone and forms part of the intermediate confining unit/aquifer system. USGS

                                               

Trenton Group

                                               

Boyue Cave

Boyue Cave is a karstic cave in Lengshuijiang, Hunan, China. Located at the foot of Mount dacheng, it was one of the locations of 1986 shenmo television series Journey to the West. It is now a popular destination for cavers, walkers, and outdoor ...

                                               

Charles Town Cave

Charles Town Cave - also formerly known as Crystal Lake Cave and Lakeland Cave - is located in the center of Charles Town, West Virginia, United States. The entrance is in the cellar of a bakery and leads down to a passage about 175 feet long to ...

                                               

Cody Caves

The Cody Caves are a network of limestone caves in the Selkirk Mountains in British Columbia, Canada. They are located 2 miles north of Ainsworth Hot Springs on the west side of Kootenay Lake. Discovered in the early 1890s, the caves became prote ...

                                               

Fisher Ridge Cave System

The Fisher Ridge Cave System is a cave system located in Hart County, Kentucky, United States, near Mammoth Cave National Park. As of February 2019 it had been mapped to a length of 129.735 miles, making it the fifth-longest cave in the United St ...

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