Williston named as upper member of Moodys Branch formation. Overlies Inglis member (new). Two types of marine limestone predominate: cream-colored coquina of camerinids and miliolids loosely held in calcite paste, and cream to tan-colored detrital limestone composed of quantities of small foraminifers with minor percentages of echinoids, large foraminifers, Comatulid brachials, and mollusks loosely held by secondary calcite and calcite paste. Thickness 27 to 32 ft. Underlies Ocala limestone restricted. Age is Eocene.

Source: GNU records (USGS DDS-6; Reston GNULEX).

Williston raised from member to formation rank. Assigned to Ocala group. Overlies Inglis formation; underlies Crystal River formation (new).

Source: GNU records (USGS DDS-6; Reston GNULEX).

Ocala recognized as Group in GA. Includes Williston Formation, geographically extended from FL. Williston is lateral equivalent (in part) of Tivola Limestone in central GA. Underlies Crystal River Formation of Ocala Group; overlies Santee Limestone or Claiborne Group. Age is late Eocene (early Jacksonian). [In 1981 Open-File report, author assigns informal Muckalee limestone member to Williston in southern GA.]

Source: GNU records (USGS DDS-6; Reston GNULEX).

Pg. 6-7. †Williston formation of †Ocala Group. Puri (1957) raised Ocala to group and recognized formations [Crystal River, Inglis, and Williston] based on foraminiferal faunas. As a result of the biostratigraphic nature of these subdivisions, formation recognition is often difficult. In keeping with the intent of the Code of Stratigraphic Nomenclature, in this text, the Florida Geological Survey is returning to the use of the Ocala Limestone terminology. (See entry under Ocala.)

Source: Publication.