extensively altered strata near the atoll margin. Aragonite dissolution and calcite cements (radiaxial and cloudy prismatic) are abundant in fore-reef, reef, and some back-reef strata. Petrographic and geochemical data indicate aragonite dissolution and calcite cementation in seawater at burial depths of 100 to 300 m. Dolomite occurstin slope and deeply buried reefal carbonates. Most dolomitization occurred at burial depths of more than 1000 m in cool marine waters circulating through the atoll. lagoonal strata are not significantly altered by marine diagenesis and still contain abundant primary aragonite and magnesium calcite. Major Descriptors: *MARSHALL ISLANDS -- REEFS; *REEFS -- DEPOSITION Descriptors: ALGAE; CALCITE; CARBONATE ROCKS; CORALS; DISSOLUTION; FOSSILS; GEOCHEMISTRY; MIOCENE EPOCH; STRATIGRAPHY Broader Terms: ALKALINE EARTH METAL COMPOUNDS; CALCIUM CARBONATES; CALCIUM COMPOUNDS; CARBON COMPOUNDS; CARBONATE MINERALS; CARBONATES; CENOZOIC ERA; CHEMISTRY; CNIDARIA; GEOLOGIC AGES; GEOLOGIC STRUCTURES; GEOLOGY; ISLANDS; MICRONESIA; MINERALS; OCEANIA; OXYGEN COMPOUNDS; PLANTS; ROCKS ; SEDIMENTARY ROCKS; TERTIARY PERIOD Subject Categories: 020200* -- Petroleum -- Reserves, Geology, & Exploration 10/5/375 (Item 75 from file: 02364806 EDB-89-110778 Author(s): Shingleton, Title: 103) Summary of the Bikini Atoll ionizing-radiation survey K.L.; Cate, J.L.; Trent, M.G.; Robison, Griffith, R.V.; Anderson, K.J. (eds.) Title: Hazards Control Department annual technology review, Corporate Source: Lawrence Livermore National Lab., Publication Date: Jul 1988 Report Number(s): Order Number: p 1-13 CA W.L.; 1987 (USA) UCRL-50007-87 DE89002470 Note: Portions of this document are illegible in microfiche products Document Type: Analytic of a Report Language: English Journal Announcement: ERA8900 Availability: NTIS, PC AQ7/MF AOl; Subfile: ERA Exchange); (Energy INS Country of Origin: Research 1. Abstracts); ETD (US Atomindex input). United States JMT (Energy Technology Data (DOE contractor) Country of Publication: United States Abstract: This survey was designed to measure the beta dose rate from /sup 137/Cs and /sup 90/Sr//sup 90/Y relative to previously measured gamma dose rates on Bikini and Eneu Islands. The authors exposed modified Panasonic-802 thermoluminescent dosimeters (TLDs) in over 100 sites for Six months to accomplish this task. The sites were selected to be either in areas of known high gamma dose rates, in areas where the Marshallese would likely spend most of their time upon resettlement, or in areas where experimental environmental changes has been made. Therefore, the beta and gamma does rates do not represent island averages. The mean beta dose rate on Enue ranged from 23 mrem/yr at 1 cm to 6 mrem/yr at 100 cm, as compared with a mean deep dose rate of 17.5 mrem/yr. The mean beta dose rate around houses and in general area on Bikini ranged from 425 mrem/yr at 1 cm to 178 mrem/yr at 100 cm, compared with a deep dose rate of about 154 mrem/yr. Because monitoring & sites were specifically placed in the most-contaminated areas of Bikini @ and Eneu, the unshielded beta dose rates reported provide an upper limit of radiation dose;actual doses received by the Bikinians would be™ reduced significantly by clothing, footwear, and ground cover such as crushed coral, which reduces the beta dose rate by 80-90%. The amount of time spent in houses and in the minimally contaminated areas around houses and the lagoon would further reduce the beta dose rates reported here. 17 referenced, 12 figures, 1 table. Major Descriptors: *BIKINI -- RADIATION MONITORING; *CESIUM 137 DOSIMETRY; *STRONTIUM 90 -- BETA DOSIMETRY Descriptors: PROGRESS REPORT; SURFACE CONTAMINATION -- BETA