This chapter reviews the use of oxygen-isotope ratios (i.e., 18O/16O) from fossil foraminifera in paleoclimate studies.1 It focuses on the constraints given by oxygen-isotope measurements for the timing, structure, and mechanisms of glaciation. The literature on stable isotopes in foraminifera has expanded considerably since the review of early work by Duplessy (1978). The emphasis here is on new developments and what they say about oxygen-isotope measurements as an ice-volume proxy. The last deglaciation is compared with long-term patterns of Quaternary glaciation. The evidence is examined for the structure of the last deglaciation recorded by marine...
Figures & Tables
North America and Adjacent Oceans During the Last Deglaciation
Most Quaternary sediments in North America north of 45°N post-date the last deglaciation. This volume looks at those extensive deposits from the standpoints of timing, cause, and mechanism of the wastage of North American ice during the last deglaciation and the accompanying environmental changes in the nonglaciated and deglaciated areas. It particularly examines the mechanisms by which a mass of ice equivalent to 100 m of global sea-level was returned to the ocean within about 8,000 years. A truly comprehensive synthesis of marine and terrestrial information in 22 chapters grouped into five sections: Chronology of Disintegration of the North American Ice Sheets, Ice Core and Other Glaciological Data, the Nonglacial Physical Record on the Continent, Biological Record on the Continent, and Analysis and Summary. Includes two oversize color plates showing time-series maps of pollen densities and vegetation changes since 18 ka.