New investigations of the Morrison Formation in the western Oklahoma panhandle reveal that the formation is approximately 60 m thick near Kenton, considerably less than historical measurements. We provide a new isopach map of the Morrison Formation at the basin margin and divide the formation into three new members based on geological, geochemical, petrographic, and paleontological characteristics. Each member is defined by unique depositional facies recording a variable climatic signal and the eventual progradation of the distributive fluvial system to the basin margin. Analogous depositional facies and lithologies of these units suggest they are lateral facies successions of the well-established members of the Colorado Plateau. The Cimarron Member is composed of numerous small, ephemeral, clastic lakes at the distal margin of the alluvial braid plain of the Tidwell Member. The Boise Member consists of numerous perennial limestone lakes at the distal edge of the Salt Wash Member distributive fluvial system. At the top of the member, the lake coalesced into a large lake, herein termed Lake Stovall. The Kenton Member records the progradation of the Brushy Basin Member distributive fluvial system to the basin margin in Oklahoma. Kenton Member fluvial deposition was by small, isolated, anastomosing fluvial channels and their associated splays. The gradual progradation of facies to the basin margin signifies that deposition in the foreland basin was geographically extensive and protracted. Dinosaur fossils excavated during the 1930s are placed into a stratigraphic framework. All quarries lie in the basal 6 m of the Kenton Member. Depositional facies and taphonomic data imply the dinosaurs died during a series of severe droughts. Bone dispersal and burial resulted from ephemeral flood splay events.

中文翻译：

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俄克拉何马州西潘汉德尔莫里森地层的地层学和沉积学-参考历史斯托瓦尔恐龙场

对俄克拉荷马州西部handhandle的Morrison地层的新调查显示，该地层在肯顿附近约60 m厚，大大少于历史测量值。我们提供了盆地边缘的莫里森地层的新等值线图，并根据地质，地球化学，岩石学和古生物学特征将其分为三个新成员。每个成员都由独特的沉积相来定义，这些沉积相记录了一个可变的气候信号，并且最终将河流分布系统向盆地边缘扩展。这些单元的相似沉积相和岩性表明它们是科罗拉多高原成熟成员的横向相演替。Cimarron成员由众多小型的，短暂的，Tidwell成员冲积辫状平原远端的碎屑湖。博伊西成员由位于盐洗成员分布河流系统远端的多年生石灰岩湖泊组成。在该成员的顶部，该湖合并为一个大湖，在此称为Stovall湖。Kenton成员记录了俄克拉荷马州Brushy Basin成员分布河流系统向盆地边缘的演化。Kenton成员的河床沉积是由小的，孤立的，吻合的河道及其相关的张开造成的。相向盆地边缘的逐渐演化表明前陆盆地的沉积在地理上是广泛且持久的。在1930年代挖掘的恐龙化石被置于地层框架中。所有采石场均位于Kenton Member的基础6 m中。沉积相和火山岩数据暗示恐龙在一系列严重干旱中死亡。短暂的洪水张开事件导致了骨头的散布和埋葬。