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四、汝阳群、洛峪群陆源碎屑沉积环境 汝阳群、洛峪群及其相当地层,除本区西南部外,以陆源碎屑沉积为主。这些陆源碎屑沉积均不含任何可资确定沉积环境的化石。因而,确定沉积环境只能主要依据:(1)自生矿物,作为浅海相沉积标志的海绿石常见于白草坪组、北大尖组、三教堂组和马鞍山组,
Four, Ruyang group, Luoyu group terrigenous clastic sedimentary environment Ruyang group, Luoyu group and its equivalent stratigraphy, in addition to the southwestern part of the area, mainly terrigenous clastic sediments. None of these terrigenous clastic sediments contain any fossil that can be used to determine the sedimentary environment. Therefore, the determination of sedimentary environment can only be mainly based on: (1) authigenic minerals, as a sign of shallow marine deposition of the glauconite common in the White Turf group, Peking University, Sanjiao Tang and Ma’anshan Formation,