Sly Gap Formation
{{Short description|Geologic formation in New Mexico, US}}
{{Use dmy dates|date=February 2025}}
{{Infobox rockunit
| name = Sly Gap Formation
| image =
| caption =
| type = Formation
| age = {{Geological range|Frasnian}}
| period = late Devonian
| prilithology = limestone
| otherlithology = siltstone, shale
| namedfor =
| namedby = F.V. Stevenson
| year_ts =1945
| region = New Mexico
| country = United States
| coordinates = {{coord|33.3322|N|106.4574|W|display=inline}}
| unitof =
| subunits =
| underlies = Percha Formation, Contadero Formation
| overlies = Onate Formation
| thickness ={{convert|114|feet|meters}}
| extent =
| area =
| map = {{Location map+ | United States#New Mexico
| relief = 1
| width = 250
| float = center
| places =
{{Location map~ | United States#New Mexico
| lat_deg = 33.341
| lon_deg = -106.491
| mark = Yellow pog.svg
| marksize = 12
}}
}}
| map_caption =
}}
The Sly Gap Formation is a geologic formation in south-central New Mexico. It preserves fossils dating back to the Frasnian Age of the late Devonian period.{{sfn|Stevenson|1945}}
Description
The formation consists of about {{convert|114|feet|meters}} of brown, yellow, or gray limestone and siltstone and brown to greenish-gray shale. It disconformably overlies the Onate Formation and is overlain by the Percha Formation{{sfn|Stevenson|1945}}{{sfn|Kues|2004}} or the Contadero Formation.{{sfn|Kues|2004}} It pinches out in the west in the Basin and Range province.{{sfn|Stevenson|1945}}
Fossils
The formation includes crinoidal siltstone beds and many other beds are fossiliferous, bearing crinoid, brachiopod, bryozoan, anthozoan, cephalopod, gastropod, fish, and coral remains.{{sfn|Stevenson|1945}}
See also
{{Portal|Earth sciences|Paleontology}}
Footnotes
{{Reflist}}
References
- {{cite journal |last1=Cooper |first1=G.A. |last2=Dutro |first2=J.T. Jr. |year=1982 |title=Devonian brachiopods of New Mexico |journal=Bulletins of American Paleontology |volume=82–83 |number=325}}
- {{cite encyclopedia |last1=Kues |first1=B.S. |year=2004 |title=Devonian of New Mexico |editor1-last=Mack |editor1-first=G.H. |editor2-last=Giles |editor2-first=K.A. |encyclopedia=The geology of New Mexico. A geologic history: New Mexico Geological Society Special Volume 11 |pages=59–75 |isbn=9781585460106}}
- {{cite journal |last1=Stevenson |first1=Frank V. |title=Devonian of New Mexico |journal=The Journal of Geology |date=July 1945 |volume=53 |issue=4 |pages=217–245 |doi=10.1086/625283}}
Category:Devonian formations of New Mexico
Category:Devonian southern paleotemperate deposits
Category:Limestone formations of the United States