Petrology and geochemistry of silicified upper Miocene chalk at DSDP Site 69-504

Chert, Porcellanite, and other silicified rocks formed in response to high heat flow in the lower 50 meters of 275 meters of sediments at Deep Sea Drilling Project Site 504,...燧石（Chert）、瓷岩（Porcellanite）及其他硅化岩，系由深海钻探计划（Deep Sea Drilling Project）504站位275米沉积物剖面下部50米范围内的高热流作用形成。