Mississippian_(geology)
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Birth and death years unknown
The Mississippian ( MISS-iss-IP-ee-ən), also known as Lower Carboniferous or Early Carboniferous, is a subperiod in the geologic timescale or a subsystem of the geologic record. It is the earlier of two subperiods of the Carboniferous period lasting from roughly 358.86 to 323.4 million years ago. As with most other geochronologic units, the rock beds that define the Mississippian are well identifi
* Calculated from Wikipedia data.
Accuracy is not guaranteed.
| Mississippian | |||||||||||||||
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.png) A map of Earth as it appeared 340 million years ago during the Mississippian Subperiod, Viséan Age | |||||||||||||||
| Chronology | |||||||||||||||
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| Etymology | |||||||||||||||
| Name formality | Formal | ||||||||||||||
| Usage information | |||||||||||||||
| Celestial body | Earth | ||||||||||||||
| Regional usage | Global (ICS) | ||||||||||||||
| Time scale(s) used | ICS Time Scale | ||||||||||||||
| Definition | |||||||||||||||
| Chronological unit | Subperiod | ||||||||||||||
| Time span formality | Formal | ||||||||||||||
| Lower boundary definition | FAD of the Conodont Siphonodella sulcata (discovered to have biostratigraphic issues as of 2006) | ||||||||||||||
| Lower boundary GSSP | La Serre, Montagne Noire, France 43°33′20″N 3°21′26″E / 43.5555°N 3.3573°E | ||||||||||||||
| Lower GSSP ratified | 1990 | ||||||||||||||
| Upper boundary definition | FAD of the Conodont Declinognathodus nodiliferus | ||||||||||||||
| Upper boundary GSSP | Arrow Canyon, Nevada, United States 36°44′00″N 114°46′40″W / 36.7333°N 114.7778°W | ||||||||||||||
| Upper GSSP ratified | 1996 | ||||||||||||||
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