Karpoff, Anne Marie (1980): The claystone layer between two basalt flows in Hole 432A; an argument for the emergence of Nintoku Seamount

Leg/Site/Hole:
DSDP 55
DSDP 55 432
Identifier:
1981-027026
georefid
10.2973/dsdp.proc.55.132.1980
doi
Creator:
Karpoff, Anne Marie
Inst. Geol., Strasbourg, France
author
Identification:
The claystone layer between two basalt flows in Hole 432A; an argument for the emergence of Nintoku Seamount
1980
In: Shambach, James (editor), Jackson, Everett Dale, Koizumi, Itaru, Avdeiko, Gennady, Butt, Arif, Clague, David, Dalrymple, G. Brent, Greene, H. Gary, Karpoff, Anne Marie, Kirkpatrick, R. James, Kono, Masaru, Hsin Yi Ling, McKenzie, Judith, Morgan, Jason, Takayama, Toshiaki, Initial reports of the Deep Sea Drilling Project covering Leg 55 of the cruises of the drilling vessel Glomar Challenger, Honolulu, Hawaii to Yokohama, Japan; July-September 1977
Texas A & M University, Ocean Drilling Program, College Station, TX, United States
55
707-711
The red claystone interlayered between basalt flows of Hole 432A is a subaerial formation. From its structure and mineralogical and geochemical composition, it is concluded that the claystone was formed by weathering of a basaltic tuffaceous ash under subtropical conditions and afterwards underwent a low-thermal transformation when the upper basalt flow settled. This agrees with the hypothesis that the Emperor seamounts, and in particular the Nintoku Seamount, were emergent during the period of their formation and of successive deposition of basalt flows.
English
Serial
Coverage:Geographic coordinates:
North:50.0000
West:160.0000East: 175.0000
South:35.0000
Oceanography; basalts; clastic rocks; claystone; Deep Sea Drilling Project; Emperor Seamounts; genesis; igneous rocks; IPOD; Leg 55; North Pacific; Northwest Pacific; ocean floors; oceanography; Pacific Ocean; seamounts; sedimentary petrology; sedimentary rocks; Site 432; stratigraphy; volcanic rocks; West Pacific;
.