Hayner Ranch Formation
{{Short description|A geologic formation in New Mexico}}
{{Use American English|date=August 2020}}
{{Infobox rockunit
| name = Hayner Ranch Formation
| image = RIncon Hills.jpg
| caption = Dark beds of the Hayner Ranch Formation exposed in the Rincon Hills, New Mexico, USA
| type = Formation
| age = {{Geological range|Miocene}}
| period = Miocene
| prilithology = conglomerate, mudstone, sandstone
| otherlithology =
| namedfor = Hayner Ranch
| namedby = Seager et al.
| year_ts = 1971
| region = New Mexico
| country = United States
| coordinates = {{coord|32.5942|N|106.9791|W|display=inline}}
| unitof = Santa Fe Group (geology)
| subunits =
| underlies = Rincon Valley Formation
| overlies = Spears Group
| thickness = {{convert|2800|meters|feet}}
| extent =
| area =
| map = {{Location map+ | United States#New Mexico
| relief = 1
| width = 250
| float = center
| places =
{{Location map~ | United States#New Mexico
| lat_deg = 32.5942
| lon_deg = -106.9791
| mark = Yellow pog.svg
| marksize = 12
}}
}}
| map_caption =
}}
The Hayner Ranch Formation is a geologic formation found near the San Diego Mountains of New Mexico. It is estimated to have been deposited during the Miocene epoch.{{sfn|Seager|Hawley|Clemons|1971}}
Description
The Hayner Ranch Formation consists of about {{convert|2800|feet|meters}} of red to tan volcaniclastic conglomerate, mudstone, and sandstone. It is the lowest formation of the Santa Fe Group in the San Diego Mountains area, overlying older volcanic rock{{sfn|Seager|Hawley|Clemons|1971}} of the Spears Group. The formation fills paleovalleys eroded in the underlying volcanic beds.{{sfn|Cather|Chamberlin|Ratte|1994}}
The formation is particularly well exposed in a half graben between the East and West Selden Hills; in Selden Canyon to the west; at its type section in the Tonuco Uplift; and in the Rincon Hills to the north, where it is coarser (including boulder conglomerates) and partially silicified. The formation is interpreted as stream and floodplain deposits near the axis of a broad closed basin.{{sfn|Cather|Chamberlin|Ratte|1994}} The narrow (12 km) half graben is tilted to the northeast and has its footwall on the Caballo Mountains block, where displacement was about {{convert|1615|meters|feet}}. Study of the formation and others in the area support at least four episodes of block faulting starting 35 million years ago, almost all along faults trending north–south.{{sfn|Mack|Seager|Kieling|1994}}
The formation records the unroofing of the Caballo Mountains. Clasts in the lower part of the formation are derived from the underlying Spears Group and those higher in the formation from the Eocene Palm Park and Love Ranch Formations. However, clasts from the Doña Ana Mountains are absent from the formation, showing that these mountains had not yet been unroofed during deposition of the formation.{{sfn|Kelley | Chapin |1997|pp=6-7}}
The formation has been studied as a model for the critical early stages of diagenesis of continental red beds of Pennsylvanian to Triassic age.{{sfn|Walker|1976}}{{sfn|Walker|Waugh|Grone|1978}} and as a model for diagenesis in the Santa Fe Group.{{sfn|Mack | Grigsby |1985}}
History of investigation
The formation was first defined by Seager et al. in 1971, and assigned to the Santa Fe Group.{{sfn|Seager|Hawley|Clemons|1971}}
Footnotes
{{Reflist}}
References
- {{cite journal |last1=Cather |first1=Steven M. |last2=Chamberlin |first2=R.M. |last3=Ratte |first3=J.C. |year=1994 |title=Tertiary stratigraphy and nomenclature for western New Mexico and eastern Arizona |journal=New Mexico Geological Society Field Conference Series |volume=45 |pages=259–266 |url=https://nmgs.nmt.edu/publications/guidebooks/downloads/45/45_p0259_p0266.pdf |accessdate=25 August 2020}}
- {{cite journal |last1=Kelley |first1=Shari A. |last2=Chapin |first2=Charles E. |title=Cooling histories of mountain ranges in the southern Rio Grande rift based on apatite fission-track analysis—a reconnaissance survey |journal=New Mexico Geology |date=February 1997 |volume=19 |issue=1 |pages=1–14 |url=https://geoinfo.nmt.edu/publications/periodicals/nmg/19/n1/nmg_v19_n1_p1.pdf |accessdate=31 August 2020}}
- {{cite journal |last1=Mack |first1=Greg H. |last2=Grigsby |first2=Jeffry D. |title=Mechanical and chemical diagenesis of the Hayner Ranch and Rincon Valley Formations (Santa Fe GrouF, Miocene), San Diego Mountain, New Mexico |journal=New Mexico Geology |date=August 1985 |volume=7 |issue=3 |pages=45–48 |url=https://geoinfo.nmt.edu/publications/periodicals/nmg/7/n3/nmg_v7_n3_p45.pdf |accessdate=31 August 2020}}
- {{cite journal |last1=Mack |first1=Greg H. |last2=Seager |first2=William R. |last3=Kieling |first3=John |title=Late oligocene and miocene faulting and sedimentation, and evolution of the southern Rio Grande rift, New Mexico, USA |journal=Sedimentary Geology |date=August 1994 |volume=92 |issue=1–2 |pages=79–96 |doi=10.1016/0037-0738(94)90055-8|bibcode=1994SedG...92...79M }}
- {{cite journal |last1=Seager |first1=W.R. |last2=Hawley |first2=J.W. |last3=Clemons |first3=R.E. |date=1971 |title=Geology of San Diego Mountain area, Dona Ana County, New Mexico |journal=New Mexico Bureau of Mines and Mineral Resources Bulletin |volume=97 |url=https://geoinfo.nmt.edu/publications/monographs/bulletins/downloads/97/Bulletin97.pdf |accessdate=14 August 2020}}
- {{cite book |last1=Walker |first1=Theodore R. |chapter=Diagenetic Origin of Continental Red Beds |title=The Continental Permain in Central, West, and South Europe |journal=The Continental Permian in Central, West, and South Europe |date=1976 |pages=240–282 |publisher=Springer |location=Dordrecht |doi=10.1007/978-94-010-1461-8_20|isbn=978-94-010-1463-2 }}
- {{cite journal |last1=Walker |first1=Theodore R. |last2=Waugh |first2=Brian |last3=Grone |first3=Anthony J. |title=Diagenesis in first-cycle desert alluvium of Cenozoic age, southwestern United States and northwestern Mexico |journal=GSA Bulletin |date=1 January 1978 |volume=89 |issue=1 |pages=19–32 |doi=10.1130/0016-7606(1978)89<19:DIFDAO>2.0.CO;2|bibcode=1978GSAB...89...19W }}
Category:Neogene formations of New Mexico
Category:Conglomerate formations