# Peninsular Arch

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{{Short description|Sub-surface structure of the geology of Florida}}
{{Infobox Rockunit
| name           = Peninsular Arch
| image          =
| caption        =
| type           = Geological structure
| age            = [Jurassic](/source/Jurassic)
| prilithology   = [Carbonate](/source/Carbonate)
| otherlithology =
| namedfor       =  
| namedby        = 
| region         = [North Florida](/source/North_Florida) to [South Florida](/source/South_Florida)
| country        = {{flag|United States}}
| coordinates    =
| unitof         = [Florida Platform](/source/Florida_Platform)
| subunits       = None
| underlies      = 
| overlies       = 
| thickness      = 
| extent         = 
| area           =
| map            =
| map_caption    =
}}

thumb|right|190px|Location of the Peninsular Arch within Florida (in red).
The '''Peninsular Arch''' is a dominant sub-surface structure of the [geology of Florida](/source/geology_of_Florida).

==Age==

The arch was present from the [Jurassic](/source/Jurassic) ~199.6–145.5 Ma through the [Paleogene](/source/Paleogene) geological periods.

==Location==
The Peninsular Arch extends from southeastern [Georgia](/source/Georgia_(U.S._State)) to just north of [Lake Okeechobee](/source/Lake_Okeechobee) in a general northwest to southeast trend. It is highest in [Union County](/source/Union_County%2C_Florida) and [Baker County](/source/Baker_County%2C_Florida). Its crest passes beneath [Alachua County](/source/Alachua_County%2C_Florida).

==Structure==
The Peninsular Arch parallels the [Ocala Platform](/source/Ocala_Platform) to its west and is the dominant sub-surface feature within Florida. It is a structurally high area which affected deposition of sediments during the [Cretaceous](/source/Cretaceous) to the early [Cenozoic](/source/Cenozoic). It was a high topographic feature during most of the Cretaceous but was covered with [Late Cretaceous](/source/Late_Cretaceous) sediments and became an ideal base and settling point for [carbonate](/source/carbonate) [sediment](/source/sediment)s during the [Eocene](/source/Eocene) when that portion of land was submerged.<ref>Applin, P., 1951, Possible future petroleum provinces of North America - Florida: American Association of Petroleum Geologists Bulletin, v. 35, p. 405-407.</ref> According to Williams and T. M. Scott, the arch did not affect sediments from depositing during the [Neogene](/source/Neogene) through [Holocene](/source/Holocene).<ref>Williams, K.E., Nicol, D., and Randazzo, A.F., 1977, The geology of the western part of Alachua County, Florida: Florida Geological Survey Report of Investigation 85, 97 p.</ref><ref>Scott, T.M., 1997, Miocene to Holocene history of Florida: in Randazzo, A.F., and Jones, D.S., eds., 1997, The Geology of Florida: Gainesville, University Press of Florida, 327 p.</ref>

==References==
{{reflist}}
*<small>[https://web.archive.org/web/20110704032030/http://199.73.242.12/geology/statemap/images/OFR_91_021308.pdf Florida Geological Survey, Richard C. Green, David T. Paul, and Thomas M. Scott, P.G.]</small>

Category:Geology of Florida

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Adapted from the Wikipedia article [Peninsular Arch](https://en.wikipedia.org/wiki/Peninsular_Arch) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Peninsular_Arch?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.