【摘要】 汪家店地区上泥盆统王冠沟组（D3w）发育了两种生物灰岩类型：生物障积灰岩和生物粘结灰岩．根据生物生态特征、造礁方式和岩石产出形态，可以划分为层状礁和生物丘，它们形成在不同的水动力条件下，具有不同的沉积环境．总体上都形成于水体较浑浊、较深的潮下低能环境中．更多还原

【Abstract】 Two types of biogenetic limestones are well developed in the Upper Devonian Wang-guangou Formation in the Wangjiandian region, Shangnan, Shaanxi. They are bafflestoneand bindstone,which may be subdivided,according to ecological characteristics,reef-build-ing modes and occurrences,into bedded reefs and bioherms produced in distinctive environ-ments under different hydrodynamic conditions. Commonly,they were all formed in moreturbid-and deeper-water subtidal low-energy environments,更多还原