equivalent due to the intake of /sup 137/Cs and /sup 90/Sr at a contaminated atoll in the Marshall Islands would be greater when intake begins as an adult than when intake begins as an infant or child. We found that generally /sup 137/Cs contributes 37 to 98% of the dose and /sup 90/Sr contributes only 2 to 3 %. We also found that the integral 30-, 50-, and 70-y effective dose equivalent estimated for intake beginning as adults is greater than that for intake beginning at any other age. There are two factors that cause the adult estimated dose to be greater than the dose to infants and children. The major factor is the consistently higher intake of local foods, and consequently higher intake of /sup 137/Cs, for adults. The second is a combination of changing body weights, fractional deposits, and biological half-life for /sup 137/Cs with age, in food with time. and the reduced concentration of /sup 137/Cs Consequently, the estimated effective integral dose equivalents for adults due to ingestion of /sup 137/Cs and /sup 90/Sr can be used as a conservative estimate or intake beginning in infancy and childhood. 95 refs., 4 figs., 10 tabs. Major Descriptors: *ADULTS -- DOSE EQUIVALENTS; *CHILDREN -- DOSE EQUIVALENTS; *INFANTS -- DOSE BQUIVALENTS; *MARSHALL ISLANDS -- HUMAN POPULATIONS Descriptors: BIOLOGICAL EFFECTS; CESIUM 137; FOOD CHAINS; INGESTION; STRONTIUM 90 Broader Terms: AGE GROUPS; ALKALI METAL ISOTOPES; ALKALINE EARTH ISOTOPES; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; CESIUM ISOTOPES; CHILDREN; EVEN-EVEN NUCLEI; INTAKE; INTERMEDIATE MASS NUCLEI; ISLANDS; ISOTOPES; MICRONESIA; NUCLEI; OCEANIA; ODD-EVEN NUCLEI; POPULATIONS; RADIOISOTOPES; STRONTIUM ISOTOPES; YEARS LIVING RADIOISOTOPES Subject Categories: Toxicology 560160* -- Radionuclide Effects, 10/5/374 (Item 74 from file: 103) 02375226 EDB-89-121200 Title: Evolution of reef and atoll margin carbonates, lower Miocene, Author(s): Saller, Enewetak, Marshall Islands A.H.; Schlanger, S.O. Kinetics, & upper Eocene through Affiliation: Unocal Science and Technology, Brea, CA (USA) Conference Title: Annual meeting of the American Association of Petroleum Geologists Conference Location: Houston, TX, USA Conference Date: 20-23 Mar 1988 Source: AAPG Bull. (United States) v 72:2. Coden: AABUD Publication Date: Feb 1988 p 243 Report Number(s): CONF-880301Document Type: Journal Article; Conference literature Language: English Journal Announcement: EDB8900 » Subfile: ETD (Energy Technology Data Exchange). JMT (DOE contractor) Country of Origin: United States Abstract: Two wells drilled along the margin of Enewetak Atoll penetrated approximately 1000 m of upper Eocene, Oligocene, and lower Miocene carbonates. Strontium isotope stratigraphy indicates relatively continuous deposition of carbonate from 40 Ma to 20 Ma. Depositional 5003108 environments show a gradual basinward progradation of facies with slope carbonates passing upward into fore-reef, reef, back-reef, and lagoonal carbonates. Slope strata contain wackestones and packstones with submarine-cemented lithoclasts, coral, coralline algae fragments, benthic rotaline forams, planktonic forams, and echinoderm fragments. Fore-reef strata are dominantly packstones and boundstones containing large pieces of coral, abundant benthic forams, coralline algae fragments, stromatoporoids( ), and minor planktonic forams. Reef and near-reef sediments include coralgal boundstones and grainstones with abundant benthic forams. Halimeda and miliolid forams are common in lagoonward parts of the back reef. Sponge borings, geopetal structures, and fractures are common in reef and fore-reef strata. Lagoonal strata are wackestones and packstones with common mollusks, coral, coralline