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Ages of Subsurface Stratigraphic Intervals in the Quaternary of Enewetak Atoll, Marshall Islands

Published online by Cambridge University Press:  20 January 2017

B. J. Szabo ,
J. I. Tracey Jr.  and
E. R. Goter
B. J. Szabo
Affiliation:
U.S. Geological Survey, Denver, Colorado 80225 USA
J. I. Tracey Jr.
Affiliation:
U.S. Geological Survey, Reston, Virginia 22092 USA
E. R. Goter
Affiliation:
Shell Oil Company, Houston, Texas 77001 USA
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Abstract

Drill cores of Enewetak Atoll, Marshall Islands, reveal six stratigraphic intervals, numbered in downward sequence, which represent vertical coral growth during Quaternary interglaciations. Radiocarbon dates indicate that the Holocene sea transgressed the emergent reef platform by about 8000 yr B.P. The reef grew rapidly upward (about 5 to 10 mm/yr) until about 6500 yr B.P. Afterward vertical growth slowed to about 0.5 mm/yr, then lateral development became dominant during the last several thousand years. The second interval is dated at 131,000 ± 3000 yr B.P. by uranium series. This unit correlates with oxygen-isotope substage 5e and with terrace VIIa of Huon Peninsula, New Guinea, and of Main Reef-2 terrace at Atauro Island. The third interval is not dated because corals were recrystallized and it is tentatively correlated with either oxygen-isotope stages 7 or 9. The age of the fourth interval is estimated at 454,000 ± 100,000 yr B.P. from measured 234U238U activity ratios. This unit is correlated with either oxygen-isotope stage 9, 11, or 13.

Type
Original Articles
Information
Quaternary Research , Volume 23 , Issue 1 , January 1985 , pp. 54 - 61
Copyright
University of Washington

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References

Barnes, J.W. Lang, E.J. Potratz, H.A. 1956 Ratio of ionium to uranium in coral limestone Science (Washington, D.C.) 124 175–176 Google Scholar
Buddemeier, R.W. Smith, S.V. Kinzie, R.A. 1975 Holocene windward reef-flat history, Enewetak Atoll Geological Society of America Bulletin 86 1581–1584 Google Scholar
Chappell, J. 1974 Geology of coral terraces, Huon Peninsula, New Guinea: A study of Quaternary tectonic movements and sea-level changes Geological Society of America Bulletin 85 553–570 Google Scholar
Chappell, J. Veeh, H.H. 1978 Late Quaternary tectonic movements and sea-level changes at Timor and Atauro Islands Geological Society of America Bulletin 89 356–368 Google Scholar
Couch, R.F. Jr. Fetzer, J.A. Goter, E.R. Ristvet, B.L. Tremba, E.L. Walter, D.R. Wendland, V.P. 1975 Drilling Operations on Eniwetok Atoll during Project EXPOE Air Force Weapons Laboratory 1–270 AFWL-TR-75-216Google Scholar
Henry, R.W. Mercer, J.W. Zbur, R.T. 1974 Near surface geologic investigations at Eniwetok Atoll Proceedings of the 2nd International Symposium on Coral Reefs Great Barrier Reef Committee Brisbane 615–626 Google Scholar
Ku, T.-L. Knauss, K.G. Mathieu, G.G. 1977 Uranium in the open ocean: Concentration and isotope composition Deep-Sea Research 24 1005–1017 Google Scholar
Ladd, H.S. Ingerson, E. Townsend, R.C. Russell, M. Stephenson, K. 1953 Drilling on Eniwetok Atoll, Marshall Islands American Association of Petroleum Geologists Bulletin 37 2257–2280 Google Scholar
Ladd, H.S. Schlanger, S.O. 1960 Drilling Operations on Eniwetok Atoll U.S. Geological Survey Professional Paper 260-Y 863–899 Google Scholar
Potratz, H.A. Barnes, J.W. Lang, E.J. 1955 A radiochemical procedure for thorium and its application to the determination of ionium in coral limestone Los Alamos Sci. Lab. [Rep. LA-1845] 1–13 Google Scholar
Ristvet, B.L. Couch, R.F. Jr. Tremba, E.L. 1980 Late Cenozoic solution unconformities at Enewetak Atoll Geological Society of America Abstracts with Programs 12 510 Google Scholar
Rosholt, J.N. Szabo, B.J. 1969 Determination of protactinium by neutron activation and alpha spectrometry Devoe, J.R. Modern Trends in Activation Analysis. U.S. National Bureau Standards, Special Publication 312. Vol. 1 327–333 Google Scholar
Sackett, W.M. Potratz, H.A. 1963 Dating of Carbonate Rocks by Ionium-Uranium ratios U.S. Geological Survey Professional Paper 260-BB 1053–1066 Google Scholar
Schlanger, S.O. 1963 Subsurface Geology of Eniwetok Atoll 991–1048 U.S. Geological Survey Professional Paper, 260-BBGoogle Scholar
Shackleton, N.J. Opdyke, N.D. 1973 Oxygen isotope and paleomagnetic stratigraphy of equatorial Pacific core V28-238: Oxygen isotope temperatures and ice volumes on a 105 year and 106 year scale Quaternary Research 3 39–55 CrossRefGoogle Scholar
Szabo, B.J. Rosholt, J.N. 1969 Uraniumseries dating of Pleistocene molluscan shells from southern California: An open system model Journal of Geophysical Research 74 3153–3260 Google Scholar
Thurber, D.I. Broecker, W.S. Blandchard, R.L. Potratz, H.A. 1965 Uranium-series ages of Pacific atoll coral Science (Washington, D.C.) 149 55–58 Google Scholar
Tracey, J.I. Jr. Ladd, H.S. 1974 Quaternary history of Eniwetok and Bikini atolls, Marshall Islands Proceedings of the 2nd International Symposium on Coral Reefs Great Barrier Reef Committee Brisbane 537–550 Google Scholar