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| Hidalgo Formation | |
|---|---|
| Stratigraphic range: late Cretaceous ~ | |
| Type | Geological formation |
| Overlies | Ringbone Formation |
| Thickness | 7,500 feet (2,300 m) |
| Lithology | |
| Primary | Basalt |
| Other | Volcaniclastics, limestone, shale |
| Location | |
| Coordinates | 31°50′49″N 108°27′25″W / 31.847°N 108.457°W |
| Region | New Mexico |
| Country |  United States |
| Type section | |
| Named for | Hidalgo County, New Mexico |
| Named by | S.G. Lasky |
| Year defined | 1938 |
  Hidalgo Formation (the United States)  Hidalgo Formation (New Mexico) | |
The Hidalgo Formation is a geologic formation of Maastrichtian age (latest Cretaceous)[1] in southwestern New Mexico.[2]
Description
The formation is mostly basalt lava flows, but with some interbedded breccia and pyroclastic rock and, in some locations, up to 200 feet (61 m) of limestone and shale. The formation rests unconformably on the Ringbone Formation, and varies greatly in thickness, from 900 to 5,000 feet (270 to 1,520 m).[3]
History of investigation
The formation was first named by Samuel G. Lasky in 1978 for outcroups found throughout Hidalgo County, New Mexico.[3]
References
- ^ Marvin, R.F.; Naeser, C.W.; Mehnert, H.H. (1978). "Tabulation of radiometric ages--Including unpublished K-Ar and fission-track ages for rocks in southeastern Arizona and southwestern New Mexico" (PDF). New Mexico Geological Society Field Conference Series. 29: 243–252. Retrieved 14 October 2021.
- ^ Lasky, Samuel G. (1938). "Newly Discovered Section of Trinity Age in Southwestern New Mexico". AAPG Bulletin. 22 (5): 524–540. doi:10.1306/3D932F80-16B1-11D7-8645000102C1865D. ISSN 0149-1423.
- ^ a b Lasky 1938. sfn error: multiple targets (2×): CITEREFLasky1938 (help)
Bibliography
- Basabilbazo, George (2000). "The Upper Cretaceous Ringbone Formation, Little Hatchet Mountains, southwestern New Mexico" (PDF). New Mexico Geological Society Field Conference Series. 51: 203–210. Retrieved 14 October 2021.
- Hayes, Philip Thayer (1970). "Cretaceous paleogeography of southeastern Arizona and adjacent areas". U.S. Geological Survey Professional Paper. Professional Paper. 658-B. doi:10.3133/pp658B.
- Lasky, Samuel G. (1938). "Newly Discovered Section of Trinity Age in Southwestern New Mexico". AAPG Bulletin. 22 (5): 524–540. doi:10.1306/3D932F80-16B1-11D7-8645000102C1865D. ISSN 0149-1423.
- Zeller, R.A., Jr. (1970). "Geology of the Little Hatchet Mountains, Hidalgo and Grant Counties, New Mexico" (PDF). New Mexico Bureau of Mines and Mineral Resources Bulletin. 96. Retrieved 16 September 2020.
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