Mathematics – Logic
Scientific paper
Aug 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977e%26psl..36...77w&link_type=abstract
Earth and Planetary Science Letters, Volume 36, Issue 1, p. 77-84.
Mathematics
Logic
47
Scientific paper
We reexamined available marine magnetics data from the Tasman Sea and reidentified sea-floor spreading anomalies in the southern portion of the basin. From the revised magnetic lineations and fracture zones we calculated new finite rotations which descrobe the evolution of the basin in terms of a simple two-plate spreading system active between about 82 and 60 m.y. ago. Allowing for the probable continental origin of the Dampier ridge, the predicted displacement of the western margin of the Lord Howe rise relative to the eastern Australian margin in the northern Tasman basin is consistent with their observed separation. Thus, the controversial episode of subduction of Tasman basin crust at the east Australian margin proposed in earlier studies is no longer necessary. Also, Department of Geological Sciences, Columbia University, New York, sN.Y. 10028, U.S.A.
Hayes Dennis E.
Weissel Jeffrey K.
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