(Table 1) Age, porocity, density, mass accumulation rates and grain size of the eolian component of sediments from DSDP Leg 92 ...

• Main Authors: Bloomstine, Maurice K, Rea, David K
• Format: Dataset
• Language: English
• Published: PANGAEA 1986
• Subjects: Event label; Latitude of event; Longitude of event; Elevation of event; Sample code/label; DEPTH, sediment/rock; AGE; Porosity; Density, dry bulk; Sedimentation rate; Accumulation rate, mass; Dust, aeolian; Accumulation rate, dust; Median, grain size; Drilling/drill rig; DSDP/ODP/IODP sample designation; see references; Coulter Counter Beckman Coulter; Calculated after FOLK; Leg92; Glomar Challenger; Deep Sea Drilling Project DSDP; Antarctic; Coulter; Maurice; Pacific; Antarc*
• Online Access: https://dx.doi.org/10.1594/pangaea.789710; https://doi.pangaea.de/10.1594/PANGAEA.789710

Eolian dust preserved in deep-sea sediments provides a record of atmospheric circulation throughout geologic time. This eolian component has been isolated to determine its mass accumulation rate (MAR) and grain size in post-middle Oligocene sediments from DSDP Sites 597 to 602, which lie along 19°S on the East Pacific Rise. The rate of eolian deposition has been very low (about 2 to 3 mg/(cm**2 x 10**3 yr) and reasonably consistent at all the sites, except that the MAR of the eolian component at Site 597 increases to an average of about 8 mg/(cm**2 x 10**3 yr) between 17 and 19 Ma. Eolian grain size at Site 598 changes dramatically at 10.5 Ma from 7.2 phi in younger sediments to 8.2 phi in older material and may provide evidence of an intensification of zonal winds that took place in response to Antarctic ice formation just prior to that time. Pliocene to Pleistocene samples from Leg 92 show no evidence of the severalfold increase in dust accumulation and grain size recorded at Northern Hemisphere locations ... : Supplement to: Bloomstine, Maurice K; Rea, David K (1986): Post-middle Oligocene Eolian deposition from the trade winds of the Southeast Pacific. In: Leinen, M; Rea DK; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 92, 331-340 ...