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首页> 外文学位 >Middle Cretaceous dinosaur tracks at Cerro de Cristo Rey, Sunland Park, New Mexico and a comparison with other paleocoastal tracksites of the southwestern United States.
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Middle Cretaceous dinosaur tracks at Cerro de Cristo Rey, Sunland Park, New Mexico and a comparison with other paleocoastal tracksites of the southwestern United States.

机译：新墨西哥州桑兰公园的塞罗·德克里斯多·雷伊的中白垩纪恐龙足迹，以及与美国西南部其他古时代的蛇迹的比较。

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摘要

Dinosaur tracksites at Cerro de Cristo Rey and in the surrounding Paso del Norte region warrant detailed study and comparison with other tracksites of similar age. Located in Sunland Park, Dona Ana County, New Mexico, El Paso, Texas, and Chihuahua, Mexico, the "Cristo Rey tracksite assemblage" is an important piece of paleoecological information for the mid-Cretaceous period (Albian-Cenomanian).; In the United States, the tracks are preserved at 8 localities in several sandstone units of the Middle Cretaceous Anapra Sandstone, also known as the Sarten Member of the Mojado Formation. This unit is exposed around a hypabyssal trachy-andesite intrusion, Cerro de Cristo Rey, and also along the Western Boundary Fault zone in the Franklin Mountains. Sarten sandstone beds are hematized and highly fractured in many areas, hence preservation and exposure of the tracks is quite variable. In Ciudad Juarez, Chihuahua, Mexico tracks are also preserved in the Sarten Member on the south side of the Cristo Rey uplift, and also in the Sierra de Juarez. Preservational styles of tracks vary greatly, including convex epi- and hyporelief, concave epirelief, in cross section, and as hematite staining (undertracks).; Track types identified are Caririchnium leonardii, Magnoavipes sp., Ankylosaur tracks, Hadrosaur-like Caririchnium sp., and swimming traces. Caririchnum sp. is the most common track type found.; The purpose of this study is to document the Cristo Rey tracksite assemblage, analyze the stratigraphy, ichnotaxonomy, and track anatomies and compare these with several other late Albian-early Cenomanian tracksites located in Northern New Mexico and Southern Colorado. The Cristo Rey tracksite assemblage correlates stratigraphically and ichnotaxonomically with the Dakota Megatracksite (Dinosaur Freeway) of New Mexico, Colorado, and Oklahoma.; Ichnogenera and stratigraphy of three additional tracksites from the Dinosaur Freeway were compared to the Cristo Rey tracksites. These are the Dakota Formation, at Dinosaur Ridge, Denver, Colorado; the Dakota Formation, Clayton Lake, New Mexico, and the Mesa Rica Formation at Mosquero Creek, New Mexico. Studies of each of these tracksites reveal that they have similar ichnogenera and stratigraphy to the Cristo Rey site. Thus, the ichnotaxa at Cristo Rey may provide more compelling evidence for the "ichnofacies concept." Stratigraphic correlation of the track-bearing beds provides information about paleoenvironment and evidence for whether or not tracks preserved in the Dinosaur Freeway are all from the same environment, and if this is an effect of paleoenvironmental preservation or behavior.; Stratigraphy of the Sarten Member at Cristo Rey shows evidence of a transgression, most likely the onset of the Greenhorn cyclothem. Channels eroded in the underlying Mesilla Valley shale are filled in by the transgressive Sarten Member, with interbedded marine shales and cross bedded sands this unit records evidence of a tidal/estuarian environment, evidenced sedimentary structures, as well as abundant vegetative matter in the shales.; Further, a comparison of internal and external track structures herein focuses on track illustration techniques and symbols. The purpose of this component of the study is to further evolve the language with which paleotrackers describe internal and external track structures. Two structures are mentioned and compared, the "wave" and the "dish." The dish apparently shows more effort in motion than the wave.
机译：塞罗·德克里斯多·雷伊和周围的北索非特地区的恐龙钙长石值得详细研究并与相似年龄的其他钙长石进行比较。 ;位于新墨西哥州多纳安娜县的桑兰公园，得克萨斯州埃尔帕索和墨西哥奇瓦瓦州，“克里斯托·雷伊轨道场集合”是白垩纪中期（阿尔比—西诺曼尼亚）的重要古生态信息。在美国，这些迹线保存在中白垩纪Anapra砂岩的几个砂岩单元的8个地方，也被称为Mojado组的Sarten成员。该单元暴露在Cerro de Cristo Rey的海草松散的安山岩侵入岩周围，以及富兰克林山脉的西边界断裂带周围。 Sarten砂岩床在许多地区已发生了热化和高度破裂的现象，因此轨道的保存和暴露情况变化很大。在墨西哥奇瓦瓦州华雷斯城，也在克里斯托雷伊隆起山脉南侧的萨滕成员以及华雷斯山脉中也保留了赛道。磁迹的保存方式差异很大，包括凸上凹和下凸，凹上凸，横截面以及赤铁矿染色（下磁迹）。识别出的赛道类型有Caririchnium leonardii，Magnoavipes sp。，Ankylosaur赛道，类似Hadrosaur的Caririchnium sp。和游泳道。 Caririchnum sp。是最常见的曲目类型。这项研究的目的是记录Cristo Rey轨道场组合，分析地层学，鱼骨分类学和跟踪解剖结构，并将其与位于新墨西哥州北部和科罗拉多州南部的其他几个晚期阿尔比亚-早期切诺曼纪的轨道遗址进行比较。 Cristo Rey航迹组合与新墨西哥州，科罗拉多州和俄克拉荷马州的达科他巨型航迹（恐龙高速公路）在地层和鱼类分类学上相关。将恐龙高速路的Ichnogenera和另外三个轨道站点的地层与Cristo Rey轨道站点进行了比较。这些是位于科罗拉多州丹佛市的恐龙岭的达科他组。 Dakota组，Clayton湖，新墨西哥州和Mesa Rica组在新墨西哥的Mosquero Creek。对这些跟踪场中的每一个进行的研究都表明，它们具有与克里斯托雷伊遗址相似的鱼眼石和地层。因此，克里斯多·雷伊（Cristo Rey）的鱼鳞生物可能为“鱼鳞相概念”提供更​​有说服力的证据。含道床的地层相关性提供了有关古环境的信息，并证明了恐龙高速公路中保存的径迹是否全部来自同一环境，以及这是否是古环境保存或行为的影响。克里斯多·雷伊（Cristo Rey）的萨尔滕（Sarten）成员地层学表明，有发生海侵的证据，最有可能是格林霍恩旋涡的发作。海侵的Mesilla谷页岩侵蚀的河道由海侵的Sarten成员填满，其中有互层的海相页岩和交叉层状的砂，该单元记录了潮汐/河口环境的证据，沉积结构以及丰富的植物质。 ;此外，本文的内部和外部轨道结构的比较集中于轨道图示技术和符号。该研究内容的目的是进一步发展古跟踪者用来描述内部和外部轨道结构的语言。提到并比较了两个结构，即“波浪”和“盘”。显然，与波相比，这道菜在运动中表现出更多的努力。

著录项

  • 作者

    Kappus, Eric J.;

  • 作者单位

    The University of Texas at El Paso.$bGeological Sciences.;

  • 授予单位 The University of Texas at El Paso.$bGeological Sciences.;
  • 学科 Geology.
  • 学位 M.S.
  • 年度 2007
  • 页码 158 p.
  • 总页数 158
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 地质学;
  • 关键词

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