Chemistry of earliest Cretaceous bentonites, supplement to: Thurow, Juergen W; von Rad, Ulrich (1992): Bentonites as tracers of earliest Cretaceous post-breakup volcanism off northwestern Australia (Legs 122 and 123). In: Gradstein, FM; Ludden, JN; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 123, 89-110

Juergen W Thurow & Ulrich von Rad
Bentonites (i.e., smectite-dominated, altered volcanic ash layers) were discovered in Berriasian to Valanginian hemipelagic (shelfal) to eupelagic (deep-sea) sediments of the Wombat Plateau (Site 761), Argo Abyssal Plain (Sites 261, 765), southern Exmouth Plateau (Site 763), and Gascoyne Abyssal Plain (Site 766).A volcaniclastic origin with trachyandesitic to rhyolitic ash as parent material is proved by the abundance of well-ordered montmorillonite, fresh to altered silicic glass shards, volcanogenic minerals (euhedral sanidine, apatite, slender zircon), and rock...
This data repository is not currently reporting usage information. For information on how your repository can submit usage information, please see our documentation.