岩层真厚度计算公式推导与编程

在岩层真厚度计算中,岩层产状和岩层分层导线段产状是基本的研究要素,本文通过建立岩层和分层导线段几何模型,首先将分层导线段投影到岩层橫剖面上,然后在橫剖面中根据岩层产状画出岩层真厚度,最后通过空间几何和三角关系化简,推导出每种条件下的岩层真厚度计算公式。文中以岩层倾角α作为分类讨论的一级划分要素,以分层导线段倾角β作为讨论的二级划分要素,以岩层走向线与分层导线水平投影线夹角γ作为讨论的三级划分要素,以岩层倾向与分层导线倾伏向夹角λ作为讨论的四级划分要素,以岩层倾角与分层导线在岩层橫剖面中的投影导线倾伏角的大小关系ψ作为分类讨论的五级划分要素,最终将岩层真厚度计算分为13种情况逐一分析推导,得出9个岩层真厚度计算公式,经综合简化,岩层真厚度综合表达式为:D=L×|sinαcosβ∣sin(ε-ω)∣±sinβcosα|,并进行了公式编程。

Survey and establishment of Nanshimenzi Bed of Tiaojishan Formation in Qinglong,northern Hebei,China

In recent years,many fossil vertebrates,including feathered dinosaurs,have been discovered at Nanshimenzi village,Gangou Town,Qinglong County,Hebei Province,China.A geological section including the fossil-bearing strata was measured at Nanshimenzi,to determine the exact geological age and sedimentary characteristics of the section,and a new lithostratigraphic unit was named as the Nanshimenzi Bed.The Nanshimenzi Bed is about 56.6 m in thickness,mainly consisting of gray sandstones and siltstones and containing fossil vertebrates and several coal streaks.On the basis of survey and comparison,the Nanshimenzi Bed should be assigned to Tiaojishan Formation and probably to the upper part of the formation.

恐龙一词的来历与“两个脑子”

８２２年，英国乡村医生曼特尔（ＧｉｄｅｏｎＭａｎｔａｌ１７９０～１８３２）的妻子，在英国苏塞克斯郡新修筑的公路旁边的岩层剖面上，发现一些动物牙齿化石，他自己又在那里找到一些骨骼化石。他把这些化石送给当时的法国古生物学家居维叶（ＧｅｏｒｇｅｓＣｕｖｉｅ...