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Geologic Time Scale

Geologic time scale. Strata mapped on the surface of the historic site are from the Quaternary Period which encompasses the past 2.56 million years, Sioux Quartzite and Catlinite are from the Statherian Period of the Paleoproterozoic Era. The Statherian Period spans 1,830 to 1,630 million years ago.

Geologic time scale. The divisions of the geologic time scale are organized stratigraphically, with the oldest divisions at the bottom and the youngest at the top. Time periods representing strata mapped in the Pipestone National Monument area are in green and at opposite ends of the time scale. GRI map abbreviations for each time division are in parentheses. Compass directions in parentheses indicate the regional locations of events. Boundary ages are millions of years ago (MYA). Pd. = “Period.” Paleoproterozoic orogenies include Mazatzal (1,650 million–1,600 million years ago), Yavapai (1,710 million–1,680 million years ago), Trans-Hudson (2,000 million–1,800 million years ago), and Algoman (1,700 million–2,500 million years ago). 1,000 million years equals 1 billion years.

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National Park Service graphic using dates from the International Commission on Stratigraphy

Public domain:Full Granting Rights

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Pipestone National Monument, Code: PIPE

Pipestone National Monument, Pipestone County, Minnesota
Latitude: 44.013500213623, Longitude: -96.3247985839844

NPS.gov Collection

01/01/0001

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Friday, August 6, 2021 4:42:50 PM

Friday, August 6, 2021 5:03:50 PM

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Monday, January 1, 0001 12:00:00 AM

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