PANGAEA_792778 (Table 2) Color, epoch, nannofossil zone, and clay mineralogy at DSDP Site 90-591 Gardner, James V; Nelson, Campbell S; Baker, Paul A (Table 2) Color, epoch, nannofossil zone, and clay mineralogy at DSDP Site 90-591 1986 PANGAEA Dataset Supplement to: Gardner, James V; Nelson, Campbell S; Baker, Paul A (1986): Distribution and character of pale green laminae in sediment from Lord Howe Rise: A probable late Neogene and Quaternary tephrostratigraphic record. In: Kennett, JP; von der Borch, CC; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 90, 1145-1159, https://doi.org/10.2973/dsdp.proc.90.125.1986 https://doi.pangaea.de/10.1594/PANGAEA.792778 Investigator James V Gardner jim@octopus.wr.usgs.gov Earth Science Event label Sample code/label Color description DEPTH, sediment/rock Epoch Nannofossil zone Smectite Illite Chlorite+Kaolinite geoscientificInformation 90-591 90-591A Drilling/drill rig Leg90 DSDP/ODP/IODP sample designation Visual description X-ray diffraction (XRD) Glomar Challenger 1982-12-19 1982-12-19 Complete -31.5843 -31.5843 164.4487 164.4487 22.06 m (DEPTH, sediment/rock) 182.9 m (DEPTH, sediment/rock) DSDP Deep Sea Drilling Project unrestricted CC-BY-3.0: Creative Commons Attribution 3.0 Unported English PANGAEA Data Publisher for Earth & Environmental Science https://www.pangaea.de/ Data Center Contact Michael Diepenbroek info@pangaea.de

Leobener Str.

Bremen Bremen 28359 Germany online 217 data points text/tab-separated-values

Pale green laminae < 2 mm thick are common features of the Neogene and Quaternary sediment of Lord Howe Rise. We believe these laminae represent diagenetically altered volcanic ash layers from regional volcanic events. Although no consistent high abundances of volcanic glass are found within the laminae, the volcanic origin of the laminae is suggested by (1) similar temporal distribution of the laminae and the distribution of volcanic ash layers elsewhere in the southwest Pacific; (2) the high abundances of authigenic smectite in the laminae; and (3) the common occurrence of iron sulfides in proximity to most of the laminae. The resulting tephrostratigraphy is considerably more complex and detailed than was previously known. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.792778"!

http://www.deepseadrilling.org/ DSDP http://www.mindat.org/min-11116.html Smectite http://www.mindat.org/min-2011.html Illite https://doi.org/10.2973/dsdp.proc.90.125.1986 Distribution and character of pale green laminae in sediment from Lord Howe Rise: A probable late Neogene and Quaternary tephrostratigraphic record https://hdl.handle.net/10013/epic.27914.d001 DSDP/ODP/IODP sample designation https://www-odp.tamu.edu:443/glomar.html Glomar Challenger DIF 9.4 2026-05-01