167 Preliminary Report


The response of California Current structure and hydrography to insolation forcing and Northern Hemisphere glaciation will be defined by Leg 167 studies, as will the longer-term oceanographic evolution of the northeastern Pacific. The sediments collected on Leg 167 will provide one of the first direct opportunities to quantify the linkages between tropical and polar climates over a broad spectrum of age scales. The Neogene histories of biogenic carbonate and opal accumulation at these drill sites will constrain their basinal and global distributions. Results from the depth transect sites will shed light on questions about deep-water hydrography, such as the existence and significance of Pacific intermediate- or deep-water formation and the linkages between deep Atlantic and Pacific circulation and carbonate burial. Significant advances in the understanding of regional biostratigraphy, of the origin of physical property variations, of rock magnetic properties, and of lithologic cyclicity will result as well. Modeling, ranging from simple box models to coupled ocean/atmosphere models, will complement data interpretation. Diagenesis of organic matter and inorganic components in sediments will be much better understood from the study of pore-water and solid-phase composition from the variety of different environments drilled during Leg 167.

Site 1010 (Proposed Site CA-14A)

Site 1011 (Proposed Site CAM-2A)

Site 1012 (Proposed Site BA-1)

Site 1013 (Proposed Site BA-2B)

Site 1014 (Proposed Site CA-15A)

Site 1015 (Proposed Site BA-4D)

Site 1016 (Proposed Site CA-11E)

Site 1017 (Proposed Site CA-9D)

Site 1018 (Proposed Site CA-8A)

Site 1019 (Proposed Site CA-1D)

Site 1020 (Proposed Site CA-4A)

Site 1021 (Proposed Site CA-5A)

Site 1022 (Proposed Site CA-2B)

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