seattle

- . SEATTLE,

UNIVERSITY OF WASHINGTON DEPARTMENT OF OCEANOGRAPHY Seattle, Washington 98105

Technical Reports Nos. 174, 175, 176, 177, 178, and 179 A COMPlLATION OF ARTICLES REPORTnIG RESEARCH SPONSORED BY THE OFFICE OF NAVAL RESEARCH

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Office of Naval Research Contracts Nonr-477(10) and Nonr-477(37) Project NR 083 012 Reference M66-78 December 1966

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Reproduction in whole or in part is permitted for any purpose of the United States Government

ARTICLES REPORTING RESEARCH SPONSORED BY THE OFFICE OF NAVAL RESEARCH Technical Report No. 174 IDENTIFICATION AND DETERMmATION OF ORGANIC ACIDS IN SEA WATER BY PARTITION CHROMATOGRAPHY, by Tadashiro Koyama and Thomas G. Thompson. The Journal of the Oceanographical Society of Japan, 20(5):209-220. 1964. -Technical Report No. 175

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QUANTITIES OF ZOOPLANKTON ArID PROPAGATION OF CALANUS FINMARCHICUS AT PERMANENT STATIONS ON THE NORWEGIAN COAST ArID AT SPITSBERGEN, 1959-1962,' by Ulf Lie. Fiskeridirektoratets Skrifter, Havunders¢kelser, 13(8):5-19. 1965. Technical Report No. 176 MAGNETIC AND PETROLOGIC STUDIES OF SEDJMENT FOUND ABOVE BASALT IN EXPERIMENTAL MOHOLE CORE EM? , by M. D. Fuller, C. G. A. Harrison, and Y. R. Nayudu. Bulletin, American Association of Petroleum Geologists, 50(3):566-573. 1966.

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Technical Report No. 177 AN INSTRUMENT SYSTEM TO MEASURE BOUNDARY-LAYER CONDITIONS AT THE SEA FLOOR, by Richard W. Sternberg and Joe S. Creager. Marine Geology, 3(6): 475-482. 1965. Technical Report No. 178 SOME CONSEQUENCES OF THE DECOMPOSITION OF ORGANIC MATTER IN LAKE NITINAT, AN ANOXIC FJORD, by Francis A. Richards ,., Joel D. Cline, William W. Broenkow, and Larry P. Atkinson. Limnology and Oceanography, lO(Suppl.): R185-R201. 1965. Technical Report No. 179 LOW-FREQUENCY SEA LEVEL OSCJLLATIONS ALONG THE PACIFIC COAST OF NORTH AMERICA, by Gunnar I. Roden. Journal of Geophysical Research, 71(20): 4755-4776. 1966. --

UNIVERSITY Of WASHINGTON DEPARTMENT OF OCEANOGRAPHY TECHNICAL REPORT NO. 176

MAGNETIC AND PETROLOGIC STUDIES OF SEDIMENT FOUND ABOVE BASALT IN EXPERIMENTAL MOHOLE CORE EM7 1 M. D. FULLER,I C. G. A. HARRISON,I AND Y. R. NAYUDU' San Diego, California INTRODUCTION

In Experimental Mohole 7 (EM7) of the Mohole test drill off the island of Guadalupe, I Contribution from the Scripps Institution of Oceanography, University of California, San Diego; Contribution No. 353, Department of Oceanography, University of Washington. The petrographic examinations were done by one of the writers (Y. R. N.); the other two authors did the magnetic work. Manuscript received, June 6, 1965.

I Present address: Department of Earth and Planetary Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania. I Marine Physical Laboratory, Scripps Institution of Oceanography, University of California, San Diego. • Present address: Department of Oceanography, University of Washington, Seattle, Washington. Parts of this research were sponsored by the

CEOI.OGICAL XOTES 28" 59' X., 11 jO 3D' W., basalt was reached during run oJ of the coring operations in this hole (EMi run 4). This run was 120 em. long but recovcred only 13.2 em. of basalt, indicating that much of the run failed to recover core material. EM7 run 3 began 120 em. above run 4, was 120 em. in length, and recovered only 98 em. of sediment, again indicating a partial failure of the run to reCO\'er core material. Because of the uncertainties in the drilling and coring operations, the depth of the basalt below the bottom of the sediment in EM7 run 3 is not known but probably was between 20-100 em. Magnetic and petrologic in\'estigations made on the sediment above the basalt are discussed with the objective of determining the nature of emplacement of the basalt. GEXERAL DESCRIPTIOS

A summary of the drilling operations during the ~Iohole test drill was given by Horton (1961), and a description of the sediment5 recovered was published br Riedel et 01. (IQ61). This paper deals with the core E~Ii run 3 (i.e., that sediment just abo\'e the basalt), and the following description of core EM7 run 3 is from Riedel et 01. (1961). Centimeters 'rom Top

0-9 9··49 63-67 67-79 and 84-98

Description Dusky yellow-green sediment with many dolomite rhombs and coccolithophoritls, grading hy mottling to: Greenish gray sediment with many dolomite rhomhs, becoming darker downward. Pale olive sediment with many dolomite rhombs, with patches of dusky yellowish grecn, changing ahruptly to: Dusky yellow sediment composed predominantly of dolomite rhombs with brownish black patches.

The remanent magnetization of 13 cylindrical samples taken from El\I7 run 3 were measured with an astatic magnetometer. The intensity of magnetization was low but not difficult to measure, pro\'ided that care was taken. Because the American Chemical SIJdety, Grant Xo. PIU' iooA j by the Office ',f Xaval Research, Contract Xllnr nIM05} and CQntract Xo. 4i7(17), Project NR

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