Chemical, isotopic and isotope-chronological data for samples from DSDP Hole 62-464 and ODP Holes 191-1179D and 198-1213B, supplement to: Mahoney, John J; Duncan, Robert A; Tejada, Maria L G; Sager, William W; Bralower, Timothy J (2005): Jurassic-Cretaceous boundary age and mid-ocean-ridge-type mantle source for Shatsky Rise. Geology, 33(3), 185-188

John J Mahoney, Robert A Duncan, Maria L G Tejada, William W Sager & Timothy J Bralower
Basalt sills cored in lowermost Berriasian sediments on Shatsky Rise in the northwest Pacific yield a mean 40Ar-39Ar incremental heating age of 144.6+/-0.8 Ma, providing a minimum estimate on the age of the Jurassic-Cretaceous boundary. The largest part of the rise was emplaced at rates similar to those of several continental flood basalts. The rise formed at an oceanic triple junction, and the sills, as well as lavas from two dredge sites, exhibit an ocean...
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