应用二项分布的参数极大似然估计法,计算地层中化石属种数目的估计值,得出在彼此相距不远的n个或可列个剖面上取样的一般估计式:N......

报道了发现于浙江江山奥陶系宁国组的疑源类化石,计16属,以Baltisphaeridium,Leiosphaeridia,Multiplicisphaeridium,Peteiosphaer......

Disi is a fossil groundwater shred between Jordan and Saudi Arabia with a very high quality properties, this water is li......