Stable oxygen isotope ratios of benthic and planktonic foraminifera from early Miocene sediments of DSDP Site 90-593 on the Challenger Plateau, Pacific Ocean (Table 1)

Oxygen isotope data are compared with relative abundances of selected planktic foraminifera through a ca. 15 m interval at DSDP Site 593 (Tasman Sea, southwest Pacific, 40°S) in which there are prominent changes in population sizes, as well as several evolutionary events. We focus on the relation between faunal and climatic histories. The base of early Miocene oxygen isotope Zone Mi1b (uppermost planktic foraminiferal Zone N.6) is identified from closesampled (c. 14 kyr) isotope records of Globigerina woodi and Cibicides kullenbergi. Chronostratigraphic interpolations, using the first occurrences of Globorotalia praescitula, G. mimea and Praeorbulina curva give an age estimate of ca. 18.4 Ma (cf. 18.1 -18.3 Ma for the base of the zone at DSDP Site 608 (type level, north Atlantic, 43°N) ). Another significant benthic delta18O enrichment event, informally designated as the base of zone "Mi1c", is identified 10 m higher in the sequence at ca. 17.8 Ma. Populations of Globoquadriau dehiscens and Globigerinoides trilobus (inferred to be near the southern margin of their distributions) either reduced considerably or withdrew, particularly in the vicinity of zone "Mi1c". A bioseries linking Globorotalia incognita with G. zealandica developed following the benthic delta18O enrichment spike at the base of Zone Mi1b; the latter species became extinct (at least regionally) just above the base of zone "Mi1c". In contrast, the apparently opportunistic Globorotlia praescitula increased dramatically in abundance at this time; there were also transformations in its architecture, leading to the evolutionary appearance of G. miozea. While planktic foraminifera abundances often do not closely covary with the detailed isotope records and tend to be more stable through time, the near coincidence of evolutionary and biogeographic events with isotopic events suggests at least indirect adaptive responses to climatic changes. Early Miocene middle-latitude planktic foraminiferal evolution, biogeography, and biostratigraphy, may be intimately connected with climatic history.

Isotopic ratios and concentrations for mineral-associated and particulate organic fractions of sediment core Wilson_Lake samples

The flux of sediment and organic carbon from continents to the coastal ocean is an important factor governing organic burial in coastal sediments, and these systems preserve important records of environmental and biogeochemical conditions during past global change events. Burial of organic materials in coastal systems can be promoted by chemical resilience or through protection by association with mineral surfaces, but the role and influence of these processes on organic records from ancient sediments is poorly known. We studied sediment and organic matter burial as particulate organic matter (POM) and mineral-bound organic matter (MOM) in near-shore marine sediments from the Wilson Lake core (New Jersey, USA) that span the Paleocene-Eocene thermal maximum (PETM), a climatic perturbation 55.9 Myr ago. Our results show that distinct POM and MOM fractions can be isolated from sediments. Both fractions appear to be dominated by terrestrial material, but POM consisted primarily of recently synthesized material whereas MOM included a significant fraction of pre-aged organic matter from soils or ancient sediments. Variation in organic burial through the PETM is associated with changes in inorganic nitrogen burial, clay mineralogy, and clastic grain size that we associate with enhanced continental weathering, erosion and redeposition of ancient kaolinites, and eustatic sea level variation, respectively. These results provide a new perspective on factors governing carbon burial and carbon isotope records in ancient marine margin settings and offer information on rate and phasing of late Paleocene/early Eocene Earth system changes that may constrain interpretations of the cause of the PETM climate change event.

Developments in Mexico and United States-Mexican relations : hearing before the Subcommittee on Western Hemisphere Affairs of the Committee on Foreign Affairs, House of Representatives, Ninety-ninth Congress, first session, October 16, 1985.

Item 1017-A, 1017-B (microfiche).

Recent developments in Mexico and their economic implications for the United States : hearings before the Subcommittee on Inter-American Economic Relationships of the Joint Economic Committee, Congress of the United States, Ninety-fifth Congress, first session, January 17 and 24, 1977.

Includes bibliographical references.

Design, operation, and monitoring of in situ soil vapor extraction systems.

Mode of access: Internet.

On the importance of an early correct education of children : embracing the mutual obligations and duties of parent and child ; and also the qualifications and discipline of teachers, with their emolument ; and a plan suggested whereby all our common schools can advantageously be made free ; the whole interspersed with several amusing, chaste anecdotes growing out of the domestic and scolastic circle ; to which is subjoined by way of appendix, the Declaration of Independence ... ; the Constitution of the United States ; with that of the state of New York as lately adopted /

Bound in green cloth; stamped in gold and blind.

Social-economic movements; an historical and comparative survey of socialism, communism, co-operation, utopianism; and other systems of reform and reconstruction

Selected references":p. 753-806.

Compulsory medical care and the welfare state; an analysis based on a special study of governmentalized medical care systems on the continent of Europe and in England.

"References by chapters": p. 147-152.

Compulsory medical care and the welfare state, an analysis based on a special study of governmentalized medical care systems on the continent of Europe and in England.

"References by chapters": p. 147-152.

The flag of the United States of America, depicting its early origin and progressive development,

Mode of access: Internet.

The evaluation of 1975 Torino type 2 restraint systems with web locking and force limiting features. Test report.

National Highway Traffic Safety Administration, Washington, D.C.

Defense Finance and Accounting Service : accounting systems strategic plan for the Department of Defense : target architecture.

Shipping list no.: 97-0197-P.

Developments respecting Turkey; a summary of events and statistics with bibliographical notes.

"One of a continuing series from American Universities Field Staff correspondents on current developments in world affairs."

Development of a systems risk methodology for single and multi-modal transportation systems. Final report.

Transportation Department, Research and Special Programs Administration, Washington, D.C.

A classified synopsis of the principal painters of the Dutch and Flemish schools, their scholars, imitators, and analogists. Including an account of some of the early German masters, connected with those of Flanders and Holland.

Mode of access: Internet.