Petrified Forest Member

Petrified Forest Member
Stratigraphic range: late Triassic,
Petrified Forest Member at its type location, north of Tiponi Point, Petrified Forest National Park
Typemember
Unit ofChinle Formation
UnderliesRock Point Formation
OverliesPoleo Formation
Lithology
PrimaryMudstone
OtherSandstone, siltstone
Location
Coordinates35°04′26″N 109°46′48″W / 35.074°N 109.780°W / 35.074; -109.780
RegionNew Mexico
CountryUnited States
Type section
Named forPetrified Forest, Navajo and Apache Counties, AZ
Named byHerbert E. Gregory
Year defined1947
Petrified Forest Member (the United States)
Petrified Forest Member (Arizona)

The Petrified Forest Member is a stratigraphic unit of the Chinle Formation in Arizona, Colorado, New Mexico, Nevada, and Utah. It preserves fossils dating back to the Triassic period.

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