Humbug Formation

The Humbug Formation is a geologic formation in Utah. It preserves fossils dating back to the Mississippian (Meramecian) of the Carboniferous period.

Humbug Formation
Stratigraphic range: Mississippian (Meramecian) 345–336 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Type	Formation
Thickness	More than 2,100 feet (640 m) (Stansbury Island)
Lithology
Primary	Dolomite
Location
Coordinates	40°12′N 111°42′W / 40.2°N 111.7°W / 40.2; -111.7
Approximate paleocoordinates	3°06′S 46°54′W / 3.1°S 46.9°W / -3.1; -46.9
Region	Utah
Country	United States
Humbug Formation (the United States) Show map of the United States Humbug Formation (Utah) Show map of Utah

Description

The Humbug Formation includes intercalated limestones, orthoquartzitic sandstones, and dolomite. It is more than 2,100 feet (640 m) thick on Stansbury Island but thins to the east and south. There the formation averages about 600 feet (180 m) thick.^[1]

Fossil content

The following fossils have been reported from the formation:^[1]

Bryozoans

• Fenestella acarinata
• F. crockfordae
• F. hamithensis
• F. rarinodosa
• F. serratula
• F. tooelensis
• F. trifurcata
• Hemitrypa reticulata
• Polypora micronodosa
• P. stansburyensis
• Ptylopora eliasi
• Septopora sp.

See also

• List of fossiliferous stratigraphic units in Utah
• Paleontology in Utah

References

1. Humbug Formation at Fossilworks.org

Bibliography

• L. H. Burckle. 1960. Some Mississippian fenestrate bryozoa from central Utah. Journal of Paleontology 34(6):1077-1098