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===Geology=== [[File:Leon County Florida geological.png|thumb|Geological make-up of Leon County]] Leon County encompasses [[basement rock]] composed of [[basalt]]s of the [[Triassic]] and [[Jurassic]] from ~251 to 145 million years ago interlayered with [[Mesozoic]] [[sedimentary rock]]s. The layers above the basement are [[carbonate rock]] created from dying [[foraminifera]], [[bryozoa]], [[mollusk]]s, and [[coral]]s from as early as the [[Paleocene]], a period of ~66—55.8 Ma.<ref>{{Cite web|url=http://www.clas.ufl.edu/users/guerry/GLY4155/sp35/Fgs35.HTM|archive-url=https://web.archive.org/web/20091228042634/http://www.clas.ufl.edu/users/guerry/GLY4155/sp35/Fgs35.HTM|url-status=dead|title=Geology of Florida, University of Florida|archive-date=December 28, 2009}}</ref> During the [[Eocene]] (~55.8—33.9 Ma) and [[Oligocene]] (~33.9—23 Ma), the [[Appalachian Mountains]] began to uplift and the erosion rate increased enough to fill the [[Gulf Trough]] with [[quartz sand]]s, [[silt]]s, and [[clay]]s via rivers and streams. The first sedimentation layer in Leon County is the Oligocene [[Suwannee Limestone]] in the southeastern part of the county as stated by the [[United States Geological Survey]] and Florida Geological Survey.<ref>{{Cite web|url=https://archive.usgs.gov/archive/sites/sofia.usgs.gov/|title=South Florida Information Access (SOFIA) -- USGS Greater Everglades Ecosystems Science|website=archive.usgs.gov|access-date=October 2, 2019}}</ref> The [[Early Miocene]] (~23.03—15.7 Ma) sedimentation in Leon County is [[Hawthorn Group]], [[Torreya Formation]] and [[St. Marks Formation]] and is found in the northern two-thirds of the county. The [[Pliocene]] (~5.332—2.588 Ma) is represented by the Miccosukee Formation scattered within the Torreya Formation. Sediments were laid down from the [[Pleistocene]] epoch (~2.588 million—12 000 years ago) through the [[Holocene]] epoch (~12,000—present) and are designated Beach ridge and trail and undifferentiated sediments. ====Terraces and shorelines==== During the Pleistocene, what would be Leon County emerged and submerged with each glacial and [[interglacial]] period. Interglacials created the county's topography. ''Also See [[Leon County Pleistocene coastal terraces]]'' ''Also see: [[Florida Platform]] and [[Lithostratigraphy]]'' ====Geologic formations==== * [[Red Hills Region]] (North) * [[Cody Scarp]] (central) * [[Woodville Karst Plain]] (South) ====Paleontology==== [[Leon County, Florida paleontological sites|Three sites]] in Leon County have yielded fossil remnants of the [[Miocene]] epoch.
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