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Uranium-series dating of fossil corals from marine sediments of southeastern United States Atlantic coastal plain
750
D. SubmarineGeologyand Geophysics
carbonate dissolution was inferred from foraminiferal indices. No evidence was found for 'total stagnation of the western North Atlantic during glacial time.' The DWBUC remained vigorous during the last 25,000 yr despite fluctuations in its depth, velocity and perhaps its chemistry. Moss Landing Mar. Lab., P.O. Box 450, Moss Landing, CA 95039, USA. (mjj) 85:5109 Ross, C.A. and J.R.P. Ross, 1985. Late Paleozoic depositional sequences are synchronous and worldwide. Geology, geol. Soc. Am., 13(3):194197. Gulf Oil Explor. and Prod. Co., P.O. Box 36506, Houston, TX 77236, USA. 85:5110 Szabo, B.J., 1985. Uraniunv-serles dating of fossil corals from marine sediments of southeastern United States Atlantic coastal plain. Geol. Soc. Am. Bull., 96(3):398-406.
Uranium-thorium measurements were used to date 55 fossiliferous coral samples obtained from several different Pleistocene deposits. 'Concordant and apparently reliable dates,' ranging from 71,000 yr to 460,000 yr were obtained for most of the samples. These ages were correlated with oxygen isotope substages. Qualitative trends in uranium series dates agreed with trends in amino acid data for all but 2 groups of samples. USGS, Box 25046, Denver, CO 80225, USA. (mjj) 85:5111 Vilks, G., D. Buckley and L. Keigwin, 1985. Late
Quaternary sedimentation on the southern Solun Abyssal Plain. Sedimentology, 32(1):69-82. Lithologic, paleontological, mineralogical, geochemical, and geochronological studies of 6 cores collected below the CCD from a flat, 10-km square area show that the top 2 m of Holocene fine-silty muds derived from local promontories overlie 6 m of Late Wisconsinian clay from northern sources, which rest in turn on sandy sediments containing probable latest Wisconsinian benthic Foraminifera from the Scotian Shelf. Atlantic Geosci. Center, Bedford Inst. of Oceanogr., P.O. Box 1006, Dartmouth, NS B2Y 4A2, Canada. (hbf) 85:5112 Wang, Pinxian and Qiubao Min, 1985. Quaternary marine transgressions in China: some basic questions. Mar. Geol. Quat. Geol., 5(1): 15-25. (In Chinese, English abstract.) Between 1922 and 1983 at least 135 papers were published which dealt with Quaternary marine
OLR (1985)32 (9)
transgressions in East China. Basic questions dealing with current practices in recognizing marine transgressions, their number (at least 5 in the last 2.4 million years), correlation and nomenclature are reviewed and discussed. Tongji Univ., Shanghai, People's Republic of China. (hbf) 85:5113 Xu, Dao-Yi et al., 1985. Abundance variation of iridium and trace elements at the Permian/Triassic boundary at SImngsi in China. Nature, Lurid., 314(6007):154-156. Inst. of Geol., State Seismological Bur., Beijing, China.
DIS0. P a l e o n t o l o g y (see also E-BIOLOGICAL OCEANOGRAPHY) 85:5114 Granlund, A.H. and J.O.R. Hermelin, 1983. M I A S - - a microcomputer-based image analysis system for micropaieontology. Stock& Contr. Geol., 39(4):127-137. Univ. of Stockholm, Dept. of Geol., S-106 91, Stockholm, Sweden. 85:5115 Hattori, Isamu, 1985. Prolmbilistic aspects of micropaleontologic assemblage zones. Mathl Geol., 17(2):167-175.
Some planktonic radiolarian, conodont and diatom species are used as index fossils to characterize micropaleontologic assemblage zones. The number of such assemblage-defining species (A) may be expressed as a ratio of the total number of species (N) in the zone. A probabilistic model relates the size of the ratio A : N to the duration of the assemblage. Problems arising from natural sorting and artificial biases are discussed. Geol. Lab., Fnkui Univ., 910 Fukui, Japan. (mjj) 85:5116 Kouyoumontzakis, Georges, 1984. Amphisteginidae (Foraminifera) of tim Congolese eonttuental shelf [E. equatorial Athmticl. Revue Micropal~ont., 27(3):196-208. (In French, English abstract.) Lab. de Stratigraph. et Paleoecol., Univ. de Provence, F 13331 Marseille Cedex 03, France.
85:5117 Lin, Meihua, 1985. History of the research of calcareous namlofo~lis [in China]. Mar. Geol. Quat. Geol., 5(1):109-114. (In Chinese, English abstract.) Inst. of Oceanology, Acad. Sin., People's Republic of China.
D. SubmarineGeologyand Geophysics
carbonate dissolution was inferred from foraminiferal indices. No evidence was found for 'total stagnation of the western North Atlantic during glacial time.' The DWBUC remained vigorous during the last 25,000 yr despite fluctuations in its depth, velocity and perhaps its chemistry. Moss Landing Mar. Lab., P.O. Box 450, Moss Landing, CA 95039, USA. (mjj) 85:5109 Ross, C.A. and J.R.P. Ross, 1985. Late Paleozoic depositional sequences are synchronous and worldwide. Geology, geol. Soc. Am., 13(3):194197. Gulf Oil Explor. and Prod. Co., P.O. Box 36506, Houston, TX 77236, USA. 85:5110 Szabo, B.J., 1985. Uraniunv-serles dating of fossil corals from marine sediments of southeastern United States Atlantic coastal plain. Geol. Soc. Am. Bull., 96(3):398-406.
Uranium-thorium measurements were used to date 55 fossiliferous coral samples obtained from several different Pleistocene deposits. 'Concordant and apparently reliable dates,' ranging from 71,000 yr to 460,000 yr were obtained for most of the samples. These ages were correlated with oxygen isotope substages. Qualitative trends in uranium series dates agreed with trends in amino acid data for all but 2 groups of samples. USGS, Box 25046, Denver, CO 80225, USA. (mjj) 85:5111 Vilks, G., D. Buckley and L. Keigwin, 1985. Late
Quaternary sedimentation on the southern Solun Abyssal Plain. Sedimentology, 32(1):69-82. Lithologic, paleontological, mineralogical, geochemical, and geochronological studies of 6 cores collected below the CCD from a flat, 10-km square area show that the top 2 m of Holocene fine-silty muds derived from local promontories overlie 6 m of Late Wisconsinian clay from northern sources, which rest in turn on sandy sediments containing probable latest Wisconsinian benthic Foraminifera from the Scotian Shelf. Atlantic Geosci. Center, Bedford Inst. of Oceanogr., P.O. Box 1006, Dartmouth, NS B2Y 4A2, Canada. (hbf) 85:5112 Wang, Pinxian and Qiubao Min, 1985. Quaternary marine transgressions in China: some basic questions. Mar. Geol. Quat. Geol., 5(1): 15-25. (In Chinese, English abstract.) Between 1922 and 1983 at least 135 papers were published which dealt with Quaternary marine
OLR (1985)32 (9)
transgressions in East China. Basic questions dealing with current practices in recognizing marine transgressions, their number (at least 5 in the last 2.4 million years), correlation and nomenclature are reviewed and discussed. Tongji Univ., Shanghai, People's Republic of China. (hbf) 85:5113 Xu, Dao-Yi et al., 1985. Abundance variation of iridium and trace elements at the Permian/Triassic boundary at SImngsi in China. Nature, Lurid., 314(6007):154-156. Inst. of Geol., State Seismological Bur., Beijing, China.
DIS0. P a l e o n t o l o g y (see also E-BIOLOGICAL OCEANOGRAPHY) 85:5114 Granlund, A.H. and J.O.R. Hermelin, 1983. M I A S - - a microcomputer-based image analysis system for micropaieontology. Stock& Contr. Geol., 39(4):127-137. Univ. of Stockholm, Dept. of Geol., S-106 91, Stockholm, Sweden. 85:5115 Hattori, Isamu, 1985. Prolmbilistic aspects of micropaleontologic assemblage zones. Mathl Geol., 17(2):167-175.
Some planktonic radiolarian, conodont and diatom species are used as index fossils to characterize micropaleontologic assemblage zones. The number of such assemblage-defining species (A) may be expressed as a ratio of the total number of species (N) in the zone. A probabilistic model relates the size of the ratio A : N to the duration of the assemblage. Problems arising from natural sorting and artificial biases are discussed. Geol. Lab., Fnkui Univ., 910 Fukui, Japan. (mjj) 85:5116 Kouyoumontzakis, Georges, 1984. Amphisteginidae (Foraminifera) of tim Congolese eonttuental shelf [E. equatorial Athmticl. Revue Micropal~ont., 27(3):196-208. (In French, English abstract.) Lab. de Stratigraph. et Paleoecol., Univ. de Provence, F 13331 Marseille Cedex 03, France.
85:5117 Lin, Meihua, 1985. History of the research of calcareous namlofo~lis [in China]. Mar. Geol. Quat. Geol., 5(1):109-114. (In Chinese, English abstract.) Inst. of Oceanology, Acad. Sin., People's Republic of China.