Английская Википедия:Crystal Peak Dolomite

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Шаблон:Infobox rockunit The Crystal Peak Dolomite is a geologic formation in the Wah Wah Mountains of western Utah. It preserves fossils dating to the Middle Ordovician period.[1]

Background

This geographic stratum is named for its dolomite (used to describe a sedimentary carbonate rock composed predominantly of the mineral dolomite). It is named for exposures at the Crystal Peak section Шаблон:Convert southwest of Smooth Canyon, Millard County, Utah in the Great Basin province. It separates the Watson Ranch Quartzite tongue of Swan Peak Quartzite from the younger Eureka Quartzite. The stratum generally consists of brown, gray to black, usually fine- to medium-grained, but may be coarse-grained, dolomite. Thin [about Шаблон:Convert thick] quartz sandstone and siltstone occur about Шаблон:Convert from base. The layer is Шаблон:Convert thick in Smooth Canyon. The stratum is fossiliferous and it has been shown to contain orthocone cephalopods and corals identified as Eofletcheria sp..[1][2] The thickness has been measured between Шаблон:Convert thick in Tule Valley, Utah to Шаблон:Convert thick in Desert Range Experiment Station, Utah; it is Шаблон:Convert thick at Crystal Peak. It is classified as Middle Ordovician age. The Crystal Peak equivalent has been recognized in the Lehman Formation in the Snake Range of Nevada, but was not specifically identified in adjoining eastern Nevada.

See also

References

Шаблон:Reflist

Bibliography

  • L.F. Hintze. 1951. Lower Ordovician detailed stratigraphic sections for western Utah. Utah Geological and Mineralogical Survey Bulletin 39:99

External links

  1. 1,0 1,1 Crystal Peak Dolomite at Fossilworks.org
  2. Hintze, 1951