首页> 外文期刊>Science Research >Biometric analysis of Lepidocyclina (Nephrolepidina) from Baba Formation (Late Oligocene) in Bai-Hassan Well-25, Kirkuk area, Northeast Iraq
【24h】

Biometric analysis of Lepidocyclina (Nephrolepidina) from Baba Formation (Late Oligocene) in Bai-Hassan Well-25, Kirkuk area, Northeast Iraq

机译:伊拉克东北基尔库克地区白哈桑25井巴坝组(晚渐新世)的Lepidocyclina(Nephrolepidina)的生物特征分析

获取原文
           

摘要

The investigation is based on a subsurface sequences of bioclastic limestone in Kirkuk area, Northeastern Iraq. These sequences were deposited in a shallow open marine environment during Late Oligocene. Tests of larger foraminifera Lepidocyclina(Nephrolepidina) are abundant in the lower and upper parts of the Baba Formation. Biometric investigations of the Megalospheric forms of Nephrolepidina assemblages from, Bai-Hassan well- 25 section led to recognize three morphometrically defined species by the combination of three parameters, 1- the degree of embracement of the protoconch by the deuteroconch (Factor A), 2- the numbers of accessory auxiliary chambers on the deuteroconch (Factor B), and 3- (Factor C) which expressed by the protoconch angle(α) formed by the two hypothetical line from the center of protoconch throught the outer attachment points of the deuteroconch walls with protoconch.
机译:该调查基于伊拉克东北部Kirkuk地区生物碎屑灰岩的地下序列。这些序列在渐新世晚期沉积在浅海开放环境中。在巴巴组的上部和下部有大量的有孔虫Lepidocyclina(Nephrolepidina)的试验。对来自Bai-Hassan井25断面的肾小球肾小球系组合的生物圈学研究通过三个参数的组合识别了三种形态学上定义的物种,即1-氘壳对原生螺壳的拥抱程度(因子A),2 -子宫锥旁辅助腔室的数量(因子B),以及3-(因子C)的数量,其表示为从原始锥心中心到整个子宫远端的两个附着点形成的两个假想线形成的原始锥角(α)带有原生螺孔的墙壁。

著录项

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