...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>GSA Bulletin >A late Pliocene to middle Pleistocene pluvial lake in Fish Lake Valley, Nevada and California
【24h】

A late Pliocene to middle Pleistocene pluvial lake in Fish Lake Valley, Nevada and California

机译：内华达州和加利福尼亚州鱼湖谷的晚新世至中更新世中生型湖泊

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The question of whether a pluvial lake existed in Fish Lake Valley, Nevada and California, has been debated for more than 100 yr. New stratigraphic evidence indicates that a lake did exist in this valley at intervals during late Pliocene to middle Pleistocene time. This lake may have drained northward, or it may have been periodically contiguous with a pluvial lake to the north in Columbus Salt Marsh. Proof of the existence of this lake, informally named Pluvial Lake Rennie, is derived from three principal outcrops of shallow-water deposits, two outcrops of deep-water deposits, and several drilling logs. The deposits contain beds of silicic tephra, which provide age control. On the basis of thickness, grain size, major-oxide chemistry of glass shards, and paleomagnetism, three of the shallow-water deposits, including deltaic(?), beach, and siliceous hot-spring sediments, consist mainly of Bishop ash derived from the 0.77 Ma eruption of the Long Valley caldera. A fourth shallow-water deposit(?) is associated with 1 Ma Glass Mountain tephra beds. The exposed deep-water deposits consist of green claystone, siltstone, and fine-grained sandstone containing tephra derived from the eruptions of the 2.1 Ma tuff of Taylor Canyon and the 2.0 Ma Huckleberry Ridge Tuff. The drilling logs record numerous thick beds of clay and sandy clay inferred to be deep-water lacustrine deposits. Pluvial Lake Rennie fluctuated in size and depth beginning prior to 2 Ma and continuing until sometime alter 0.77 Ma. At about 0.77 Ma, the lake had a highstand at an elevation of 1,460 m, covered an area of 400-500 km2, and had a maximum depth of 250 m. The lake level dropped just after the eruption of the Bishop ash, but the lake may have persisted at a lower level until 0.5 Ma. No large, long-lived lake existed in Fish Lake Valley in late Pleistocene time, probably due to the increasing rain-shadow effect caused by the relative uplift of the White Mountains and Sierra Nevada in the Pleistocene. These results indicate that the late middle to late Pleistocene history of Pluvial Lake Rennie is similar to that of Lake Tecopa but is quite different from those of Lake Lahontan and Searles Lake.
机译：鱼湖 谷，内华达州和加利福尼亚州是否存在冲积湖这个问题已经争论了超过100年。新的地层学证据表明，在上新世晚期至中新世中期，湖中确实存在 。该湖可能是向北排水的，或者它可能与一个冲积湖周期性毗连，一直流向哥伦布盐沼北部的 。 的证据该湖的存在，非正式地命名为Pluvial 雷尼湖，来自三个主要的浅水沉积物露头，两个深水沉积物露头和几个钻探的> 日志。矿床中含有硅质特非拉床，可提供 年龄控制。根据厚度，晶粒大小，玻璃碎片的主要氧化物 化学和古磁铁矿学，三个 浅水沉积物，包括三角洲（？），海滩，硅质的 温泉沉积物主要由of谷火山口的0.77 Ma喷发的毕晓普火山灰组成。第四个浅水 沉积物（？）与1 Ma玻璃山特非拉河床有关。 裸露的深水沉积物由绿色粘土岩组成， 粉砂岩和细粉砂岩，其中含有来自泰勒峡谷2.1 Ma凝灰岩和 2.0 Ma哈克贝利里奇凝灰岩的喷发而产生的 。钻探记录记录了许多 厚粘土层和砂质粘土，推测它们是深水 湖相沉积物。 雨湖雷尼湖的大小和深度都在波动从开始 到2 Ma，一直持续到某个时候改变0.77 Ma。在大约 0.77 Ma时，该湖在1460 m的高处处于高水位， 覆盖了400-500 km 2 的面积，最大深度为250 m。 Bishop 火山灰爆发后，湖泊水位下降，但是湖泊可能一直保持在较低的水位，直到 0.5 Ma。在更新世晚期，鱼湖谷 中不存在长寿的大型湖泊，这可能是由于怀特山的相对隆起引起的雨影效应增加的缘故。 sup> 和内华达山脉在更新世。这些结果表明 上新世晚中期至晚更新世的 雷尼湖与特科帕湖的历史相似，但 与Lahontan湖和Searles湖。

著录项

  • 来源
    《GSA Bulletin》 |1993年第7期|953-967|共15页
  • 作者

    MARITH C. REHEIS; JANET L. SLATE; ANDREI M. SARNA-WOJCICKI; CHARLES E. MEYER;

  • 作者单位

    U.S. Geological Survey, MS-913, Federal Center, Denver, Colorado 80225;

    Department of Geological Sciences, University of Colorado, Boulder, Colorado 80309;

    U.S. .Geological Survey, MS-975, 345 Middlefield Road, Menlo Park California 94025;

    U.S. .Geological Survey, MS-975, 345 Middlefield Road, Menlo Park California 94025;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号