Word Formation
Stratigraphic range: Roadian-Wordian
~272–265.1 Ma
Fossil from the Word Formation
TypeFormation
Sub-unitsAppel Ranch, China Tank & Willis Ranch members
OverliesRoad Canyon Formation
Lithology
PrimaryLimestone
Location
Coordinates30°24′N 103°12′W / 30.4°N 103.2°W / 30.4; -103.2
Approximate paleocoordinates1°36′N 33°00′W / 1.6°N 33.0°W / 1.6; -33.0
RegionTexas
Country United States
ExtentGlass Mountains
Type section
Named forOld Word Ranch
Word Formation is located in the United States
Word Formation
Word Formation (the United States)
Word Formation is located in Texas
Word Formation
Word Formation (Texas)

The Word Formation is a geologic formation in Texas.[1] It preserves fossils dating back to the Permian period. It is probably named for the Old Word Ranch in the Glass Mountains of Brewster County.[2]

Defining formation

The Wordian age of the Permian Period is named for the Word Formation.[3]

Subdivisions

The formation is subdivided into three members, from young to old:

Fossil content

The limestone formation contains marine gastropods, brachiopods and ammonites.[1]

Vertebrate paleofauna

See also

References

  1. ^ a b Word Formation at Fossilworks.org
  2. ^ Word Formation by USGS, retrieved 5 January 2017
  3. ^ Old Word Ranch, Glass Mountains at Fossilworks.org
  4. ^ Appel Ranch member at Fossilworks.org
  5. ^ China Tank member at Fossilworks.org
  6. ^ Willis Ranch member at Fossilworks.org

Further reading

Categories