Abstract: During the period 1948-1958, approximately 40 nuclear weapons tests were performed on the Enewetak Atoll in the Marshall Islands of the central Pacific Ocean. In 1973, the results of a survey contracted by the US Atomic Energy Commission specified that extensive decontamination of the land areas would be necessary before the people of Enewetak could return to the atoll. During Operation Redwing in 1956, several members of the New York University Departments of Biology and Environmental Medicine visited the atoll and collected water, plankton and beach coral samples to study the distribution of foraminifera among the islands of Enewetak and other nearby atolls. Of the specimens collected, 22 samples of beach material from the highly contaminated northern islands of Enewetak remained intact and were available for study. Analyses of the radionuclide concentrations of these samples have provided interesting information regarding the levels of contamination that existed on Enewetak at that time. Major Descriptors: *CORALS -- RADIOCHEMICAL ANALYSIS; *FORAMINIFERA -RADIOCHEMICAL ANALYSIS Descriptors: AMERICIUM 241; CESIUM 137; COBALT 60; ENIWETOK; EBUROPTIUM 155; HARDTACK PROJECT; REDWING PROJECT Broader Terms: ACTINIDE ISOTOPES; ACTINIDE NUCLEI; ALKALI METAL ISOTOPES; ALPHA DECAY RADIOISOTOPES; AMERICIUM ISOTOPES; ANIMALS; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; CESIUM ISOTOPES; CHEMICAL ANALYSIS; CNIDARIA; COBALT ISOTOPES; EUROPIUM ISOTOPES; EXPLOSIONS; HEAVY NUCLEI; INTERMEDIATE MASS NUCLEI; INTERNAL CONVERSION RADIOISOTOPES; INVERTEBRATES; ISLANDS; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; MARSHALL ISLANDS; MICRONESIA; MICROORGANISMS; MINUTES LIVING RADIOISOTOPES; NUCLEAR EXPLOSIONS; NUCLEI; OCHANIA; ODD-EVEN NUCLEI; ODD-ODD NUCLEI; PROTOZOA; QUANTITATIVE CHEMICAL ANALYSIS; RADIOISOTOPES ( RARE EARTH ISOTOPES; RARE EARTH NUCLEI; SARCODINA; YEARS LIVING RADIOISOTOPES Subject Categories: 510302* -- Environment, Terrestrial -~ Radioactive Materials Monitoring & Transport -- Terrestrial Ecosystems & Food Chains 10/5/638 01573168 -- (-1987) (Item 338 from file: 103) ERA-10-026048; EDB-85-079945 Author(s): Burton, D.E.; Swift, R.P.; Glenn, H.D.; Bryan, J.B. Title: Blast induced subsidence in the craters of nuclear tests over coral Corporate Source: Lawrence Livermore National Lab., CA (USA) Conference Title: 26. U.S. symposium on rock mechanics Conference Location: Rapid City, SD, USA Conference Date: Publication Date: Feb 1985 p 9 Report Number(s): Order Number: UCRL-91639; DE85007975 Contract Number (DOE): Document Type: Report; Language: English Journal Announcement: CONF-850671-4 W-7405-ENG-486 Conference literature NTS8506 Availability: NTIS, PC AO02/MF AOl. Subfile;: NTS Abstracts). 26 Jun 1985 (NTIS); INS (US * Atomindex input); ERA (Energy Research Country of Origin: United States Country of Publication: United States Abstract: The craters from high-yield nuclear tests at the Pacific Proving Grounds are very broad and shallow in comparison with the bowl-shaped craters formed in continental rock at the Nevada Test Site and elsewhere. Attempts to account for the differences quantitatively have been generally unsatisfactory. We have for the first time successfully modeled the Koa Event, a representative coral-atoll test. On the basis of plausible assumptions about the geology and about the constitutive relations for coral, we have shown that the size and shape of the Koa crater can be accounted for by subsidence and liquefaction phenomena. If future studies confirm these assumptions, it will mean that some scaling formulas based on data from the Pacific will have to be revised to avoid overestimating weapons effects in continental geology. 9 refs., 5 figs.