Hell-to-Finish Formation | |
---|---|
Stratigraphic range: | |
Type | Formation |
Unit of | Bisbee Group |
Underlies | U-Bar Formation |
Overlies | Various Paleozoic units, Broken Jug Formation |
Thickness | 1,700–3,500 feet (520–1,070 m) |
Lithology | |
Primary | Shale, mudstone, siltstone |
Location | |
Coordinates | 31°32′36″N 108°20′28″W / 31.5433°N 108.3411°W |
Region | New Mexico |
Country | United States |
Type section | |
Named for | Hell-to-Finish tank |
Named by | R.A. Zeller Jr. |
Year defined | 1965 |
The Hell-to-Finish Formation is a geologic formation in southwestern New Mexico. It preserves fossils dating back to the early Cretaceous period. [1] [2] [3]
The formation consists mostly of red to red-brown to gray or green shale, mudstone, and arkosic siltstone. The base of the formation is a well indurated conglomerate derived from the underlying Paleozoic beds. Minor arkose and limestone are present in the uppermost beds. [1] The total thickness is up to 1,700–3,500 feet (520–1,070 m) but varies considerably over the region. The formation rests on a profound unconformity with underlying Paleozoic formations in most locations, but overlies the Broken Jug Formation in the Little Hatchet Mountains. [4] The Hell-to-Finish Foramtion is transitional to the overlying U-Bar Formation. [3] The transitional contact with the Aptian U-Bar Formation suggests that the Hell-to-Finish Formation cannot be much older than Aptian. [5]
The formation is interpreted as being deposited in an arid client, based on the nature of paleosols within the formation. [6] Deposition took place in a west-northwest-trending rift basin. [7]
The upper beds of the formation contain abundant pelecypods. [1] However, no age-diagnostic fossils have been found in the formation. [5]
The formation was first defined by Zeller in 1965 for exposures near the Hell-to-Finish tank in the southern Big Hatchet Mountains of New Mexico. [1]
Hell-to-Finish Formation | |
---|---|
Stratigraphic range: | |
Type | Formation |
Unit of | Bisbee Group |
Underlies | U-Bar Formation |
Overlies | Various Paleozoic units, Broken Jug Formation |
Thickness | 1,700–3,500 feet (520–1,070 m) |
Lithology | |
Primary | Shale, mudstone, siltstone |
Location | |
Coordinates | 31°32′36″N 108°20′28″W / 31.5433°N 108.3411°W |
Region | New Mexico |
Country | United States |
Type section | |
Named for | Hell-to-Finish tank |
Named by | R.A. Zeller Jr. |
Year defined | 1965 |
The Hell-to-Finish Formation is a geologic formation in southwestern New Mexico. It preserves fossils dating back to the early Cretaceous period. [1] [2] [3]
The formation consists mostly of red to red-brown to gray or green shale, mudstone, and arkosic siltstone. The base of the formation is a well indurated conglomerate derived from the underlying Paleozoic beds. Minor arkose and limestone are present in the uppermost beds. [1] The total thickness is up to 1,700–3,500 feet (520–1,070 m) but varies considerably over the region. The formation rests on a profound unconformity with underlying Paleozoic formations in most locations, but overlies the Broken Jug Formation in the Little Hatchet Mountains. [4] The Hell-to-Finish Foramtion is transitional to the overlying U-Bar Formation. [3] The transitional contact with the Aptian U-Bar Formation suggests that the Hell-to-Finish Formation cannot be much older than Aptian. [5]
The formation is interpreted as being deposited in an arid client, based on the nature of paleosols within the formation. [6] Deposition took place in a west-northwest-trending rift basin. [7]
The upper beds of the formation contain abundant pelecypods. [1] However, no age-diagnostic fossils have been found in the formation. [5]
The formation was first defined by Zeller in 1965 for exposures near the Hell-to-Finish tank in the southern Big Hatchet Mountains of New Mexico. [1]