The earliest Phanerozoic hardground occurs from the middle Cambrian of China.
The hardgrounds develop on oolitic grainstone, oncolitic wackestone, and microbialite.
Microbialites encrusted hardgrounds, whereas macroborers were generally absent.
Metazoan encrustors and macroborers could not inhabited newly appeared hardgrounds.
Additional evidence of middle Cambrian calcite sea is presented by hardgrounds.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址:北京市海淀区学院路29号 邮编:100083 电话:办公室:(+86 10)66554848;文献借阅、咨询服务、科技查新:66554700 |