Geologic Features of Areas of Abnormal Radioactivity South of Ocala, Marion County, Florida

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Description

From abstract: Areas of abnormal radioactivity south of Ocala, Marion County, Fla., discovered in 1953 by aerial survey, were investigated by surface examination and by 10 power auger drill holes. Interbedded clay, clayey sand, and uraniferous phosphorite occur in the areas of anomalous radioactivity. Miocene fossils occur at three localities in these beds which are evidently outliers of Miocene sediments on the Ocala limestone of Eocene age. The preserved outliers are southwest of the main belt of Miocene sediments. The principal uraniferous rocks are clayey, sandy, pellet phosphorite that occurs in beds a few feet thick, and very porous, phosphatic ... continued below

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26 p. : ill., maps ; 29 cm.

Creation Information

Espenshade, Gilbert H. March 1956.

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  • Geological Survey (U.S.)
    Publisher Info: U.S. Dept. of the Interior, Geological Survey
    Place of Publication: Washington D.C.

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  • Main Title: Geologic Features of Areas of Abnormal Radioactivity South of Ocala, Marion County, Florida
  • Added Title: Trace Elements Memorandum Report 941
  • Series Title: United States Geological Survey Reports
  • Added Title: United States Geological Survey Report 941

Description

From abstract: Areas of abnormal radioactivity south of Ocala, Marion County, Fla., discovered in 1953 by aerial survey, were investigated by surface examination and by 10 power auger drill holes. Interbedded clay, clayey sand, and uraniferous phosphorite occur in the areas of anomalous radioactivity. Miocene fossils occur at three localities in these beds which are evidently outliers of Miocene sediments on the Ocala limestone of Eocene age. The preserved outliers are southwest of the main belt of Miocene sediments. The principal uraniferous rocks are clayey, sandy, pellet phosphorite that occurs in beds a
few feet thick, and very porous, phosphatic sand rock which makes abundant float at many places. Apatite forms the phosphate pellets in the unweathered phosphorite. The very porous, phosphatic sand rock is the highly leached residuum of the pellet phosphorite and is composed mainly of quartz, kaolinite, wavellite, and crandallite ( pseudowavellite2). It closely resembles the aluminum phosphate rock of the "leached zone" of the Bone Valley formation in the land-pebble phosphate district.

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26 p. : ill., maps ; 29 cm.

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Technical Report Archive and Image Library

This selection of materials from the Technical Report Archive and Image Library (TRAIL) includes hard-to-find reports published by various government agencies. The technical publications contain reports, images, and technical descriptions of research performed for U.S. government agencies. Topics range from mining, desalination, and radiation to broader physics, biology, and chemistry studies. Some reports include maps, foldouts, blueprints, and other oversize materials.

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  • March 1956

Added to The UNT Digital Library

  • Jan. 27, 2017, 10:19 a.m.

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  • Feb. 28, 2017, 8:51 a.m.

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Citations, Rights, Re-Use

Espenshade, Gilbert H. Geologic Features of Areas of Abnormal Radioactivity South of Ocala, Marion County, Florida, report, March 1956; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc502289/: accessed December 15, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.