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Holder Formation

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Holder Formation
Stratigraphic range: Gzhelian PreꞒ Ꞓ O S D C P T J K Pg N ↓
TypeFormation
UnderliesBursum Formation
OverliesBeeman Formation
Thickness850 ft (260 m)
Lithology
PrimaryLimestone
OtherShale
Location
Coordinates32°49′19″N 105°52′26″W / 32.822°N 105.874°W / 32.822; -105.874
RegionNew Mexico
CountryUnited States
Type section
Named forHolder Ridge
Named byL.C. Pray
Year defined1954
Holder Formation is located in the United StatesHolder FormationHolder Formation (the United States)Show map of the United StatesHolder Formation is located in New MexicoHolder FormationHolder Formation (New Mexico)Show map of New Mexico

The Holder Formation is a geologic formation in the Sacramento Mountains of New Mexico. It preserves fossils dating back to the late Pennsylvanian.

Description

The Holder Formation consists of limestone, red and gray calcareous shale, sandstone, and conglomerate. The maximum thickness is 850 ft (260 m). The formation overlies the Beeman Formation and is overlain by the Laborcita Formation.

The formation is interpreted as a shallow-shelf marine formation of Virgilian (latest Pennsylvanian) age during a global ice age.

Fossils

Bioherms are present at the base of the formation. These are up to 50–75 feet (15–23 meters) thick. They are composed of uncalcified cup-shaped phylloid (leaf-like) algae surrounded by masses of beresellid algae.

History of investigation

The unit was first named by Lloyd C. Pray in 1954 and a type section was designated in 1959. Pray originally assigned the formation to the Magdalena Group, but the Magdalena Group has subsequently been abandoned.

See also

Footnotes

  1. ^ Pray 1954.
  2. ^ Kues & Giles 2004.
  3. ^ Pray 1961.
  4. ^ Choh & Kirkland 2008.
  5. Baars & Torres 1991.
  6. Pray 1959.

References

  • Baars, D. L.; Torres, Andrew M. (October 1991). "Late Paleozoic Phylloid Algae: A Pragmatic Review". PALAIOS. 6 (5): 513. doi:10.2307/3514989.
  • Choh, Suk-Joo; Kirkland, Brenda L. (1 September 2008). "Sedimentologic role ofin situ Beresellid algal colonies, Holder Formation (Upper Pennsylvanian), New Mexico, U.S.A.". Carbonates and Evaporites. 23 (2): 79–88. doi:10.1007/BF03176154.
  • Kues, B.S.; Giles, K.A. (2004). "The late Paleozoic Ancestral Rocky Mountain system in New Mexico". In Mack, G.H.; Giles, K.A. (eds.). The geology of New Mexico. A geologic history: New Mexico Geological Society Special Volume 11. pp. 95–136. ISBN 9781585460106.
  • Pray, L.C. (1954). "Outline of the stratigraphy and structure of the Sacramento Mountain escarpment [Otero County, New Mexico]" (PDF). New Mexico Geological Society Field Conference Guidebook. 5: 92–107. Retrieved 29 July 2020.
  • Pray, L.C. (1959). "Stratigraphic and structural features of the Sacramento Mountain Escarpment, New Mexico". In Pray, L.C. (ed.). Guidebook for joint field conference in the Sacramento Mountains of Otero County, New Mexico. Alamogordo, NM: Society of Economic Paleontologists and Mineralogists, Permian Basin Section, Field Trip Guidebook, Joint field conference of Society of Economic Paleontologists and Mineralogists, Permian Basin Section, and Roswell Geological Society. pp. 86–130.
  • Pray, L.C. (1961). "Geology of the Sacramento Mountains Escarpment, Otero County, New Mexico". New Mexico Bureau of Mines and Mineral Resources Bulletin. 35. Retrieved 30 July 2020.
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