Cholesterol and C30 of sediment profile MD90-963

In a deep-sea sediment core recovered from a site lying well above the local lysocline, several organic geochemical proxies, and two different calcite dissolution indicators, are compared in order to evaluate the relationship between calcite dissolution and paleoproductivity over the past three glacial-interglacial cycles. The degree of foraminiferal break-up, and the CaCO3 particle size distribution, both point to significant periods of dissolution every 22 kyr during glacial stages and substages. These dissolution events are concomitant with periods of enhanced primary productivity, as indicated by the abundance of several biomarkers (alkenones, cholesterol, brassicasterol, keto-ol), used here to indicate changes in paleoproductivity. Dissolution fluctuations are highly coherent and in phase with the estimated paleoproductivity variations providing strong evidence that the observed dissolution is due to organic matter remineralization within the sediments rather, than to changes in CO32? concentration in the overlying water column.

Hearings on the Navy proposal to modify SSN-688 contracts with the General Dynamics Corp. (Electric Boat Division) and LHA and DD-963 contracts with Litton Industries, Inc./Litton Systems, Inc. (Ingalls Shipbuilding Division /

Mode of access: Internet.

Pollution patterns in the Ohio River, 1950; water-quality conditions and changes revealed by a simultaneous sampling of the 963-mile stretch from Pittsburgh to Cairo.

Cover title.

Organizational, direct and general support, and depot maintenance repair parts and special tools list : air conditioner, floor mounted, air cooled, 60,000 Btu/hr, 208/416V, 50/60 cycle, 3 phase (Carrier Air Conditioning Co. model 76E34-104), FSN 4120-963-4477.

"June 1968."

Operator, organizational, direct and general support, and depot maintenance manual : motor generator power supply, generator - 60 KW, AC, 120/208V, 240/416V, 3 phase, 4 wire service, 400 cycle, DC component output, 28V, 10 amp, motor input, AC, 120/208V, 240/416V, 3 phase, 60 cycle, skid mounted (John R. Hollingsworth Co. model JHMX60G) FSN 61225-963-6712.

Includes index.