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SCI/245. Basement rocks were detached from the African Plate when the Pangaea rifted and had moved closer to the North American Plate. The formation of.

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Presentation on theme: "SCI/245. Basement rocks were detached from the African Plate when the Pangaea rifted and had moved closer to the North American Plate. The formation of."— Presentation transcript:

1 SCI/245

2 Basement rocks were detached from the African Plate when the Pangaea rifted and had moved closer to the North American Plate. The formation of carbonates was critical which was caused by the sinking of basement rocks Florida Platform was created during the Cretaceous Period Siliciclastic sediments were introduced during the erosion of Appalachian Highlands Interglacial and glacial events during the Quaternary Period, sea level changes, deposition, erosion, and the formation of the modern topography occurred..

3 Florida Platform Basement rocks are part of African Plate Carbonate sedimentation from mid-Jurassic to mid-Oligocene Siliciclastic sedimentation Pliocene to Holocene

4 Radioactivity studies help determine Absolute age. Correlation of rock units between using fossils determine the relative age.

5 Florida was part of African Plate Pangaea 230 million years ago (top left) Triassic Period 195 million years ago (top right) Cretaceous Period 65 million years ago (bottom)

6 Sea level variations during Cenozoic and Quaternary Periods led to stages of non-deposition, weathering, and erosion. Siliciclastic sediments were brought and were eroded from Appalachian Highlands over the Florida Platform during mid-Cenozoic to late Paleocene.

7 Limestone Dolomite Interbedded with sand, silt, clay

8 Basement Rocks Pre-Cambrian to Cambrian igneous rocks (granite) Central Florida Triassic to Jurassic volcanic rocks North Florida Mesozoic volcanic (basalt) rocks South Florida

9 Everglades Largest subtropical wilderness in U.S. Unique fauna & flora National Park World Heritage Site Lake Okeechobee 730 sq. miles 2 nd largest lake in continental U.S. Headwaters of Everglades Used for commercial fishing, drinking water, and irrigation

10 Phosphate Clay Limestone Dolomite Coquina Sand and Gravel Oil and Gas Heavy Minerals Peat

11 I have chosen Florida for this presentation because of its distinctive geologic history that is different from the rest of the North American Plate. Also, considering that I do live in a place where there is a cold winter, it would be great to visit such a very nice warm place!

12 Florida Institute of Phosphate Research (FIPR), (2004). Phosphate Primer. Retrieved from http://www1.fipr.state.fl.us/PhosphatePrimer/0/AE4CF5150A93866485256F800079933B Lane, E., (1994). Florida’s Geologic History and Geological Resources. Tallahassee: Florida Geological Survey. Retrieved on Scott, T., Campbell, K., Rupert, F., Arthur, J., Missimer, T., Lloyd, J., Yon, W., Duncan, J., (2001). Geologic Map of the State of Florida. FGS Open File Report No. 80. Retrieved on South Florida Water Management District (SFWMD), (2009). Lake Okeechobee. Retrieved from http://www.sfwmd.gov/portal/page/portal/pg_grp_sfwmd_koe/pg_sfwmd_koe_lakeokeechob ee Department of Environmental Protection (N/A) The Geological Time Scale from http://www.dep.state.fl.us/geology/geologictopics/rocks/time_scale.htm


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