Order number page 24 940330-160606-96 -001-001 set 11 with 111 of 111 items reef data sets. Canonical variates analyses, (CVA) separated populations from depth zones alony single, highly significant, functions. Centroids and 95% confidence intervals, calculated from CVA scores of colonies in each population, are widely separated for the lagoon reef and combined data sets. Conversely, populations from shallow and intermediate depths on the outer reef display overlapping confidence bars indicative of more gradational morphologic changes. When CV's were used to classify specimens to groups, misassignments of intermediate depth specimens to shallow or deep-water populations underscored the gradational nature of the environment. Completely intergrading populations of Favia pallida collected from different depths can be morphologically separated into statistically distinct groupings. A stratigraphic succession of such morphotypes might be interpreted as abruptly appearing separate species if sampling were not as uniform, systematic, and detailed as was possible on modern reefs. Analyses of evolutionary patterns must carefully assess potential effects of clinal variation if past evolutionary patterns are to be interpreted correctly. COASTAL REGIONS/geomorphology ;CORALS/morphology ; KEYWORDS ENIWETOK/coastal regions ;CLASSIFICATION; CLIMATES; GEOMORPHOLOGY ; CORALS ; MORPHOLOGY ; CORRELATIONS ; DEPTH; ENIWETOK; ENVIRONMENTAL EFFECTS; GEOLOGIC HISTORY; QUATERNARY PERIOD; REEFS; SAMPLING; STRATIGRAPHY; VARIATIONS EDB Item 32 ANALYTIC TITLE ENGLISH ANALYTIC AUTHOR/AFFIL PAGE RANGE PUB. DATE (YYMMDD) LIMITATION CODE ABSTRACT Introduction: Enewetak Atoll and the PEACE program Henry, T.W.; Wardlaw, B.R. A1-A29 900000 UNL An extensive study was made from June 1984 through August 1985 of the surface and subsurface configurations of two large nuclear craters on the northern side of Enewetak Atoll, Republic of the Marshall Islands. These craters, KOA and OAK, resulted from the near-surface detonation of two high-yield thermonuclear devices .in 1958, when the atoll was part of the Pacific Proving Grounds. This multidisciplinary study was designed to produce a broad well-documented geologic, geophysical, and materials-properties data base for use in answering critical questions concerning craters formed by high-yield bursts. The study was part of a larger research initiative by the US Department of Defense to better understand high-yield, strategic-scale nuclear 9003%58