Detailed sedimentological analysis of the Pokaran Boulder Bed, representing the most basal unit of the Neoproterozoic-Lower Cambrian Marwar Supergroup, clearly indicates its glacial origin. The glacial sediments are interpreted as an ice-contact submarine fan deposit. Based on the detrital and inherited zircon population of the Marwar Supergroup sediments and interlayered pyroclastic deposits, a Marinoan cryochron of the Cryogenian Period is envisaged for the Pokaran Boulder Bed. The well-preserved Ediacaran elements in the post-glacial sedimentary succession also support a Cryogenian to Early Cambrian age of the Marwar Supergroup. The glacial deposition at the base of the Marwar Supergroup strengthens the regional correlation between the studied sediments with the Lesser Himalayan Blaini-Krol-Tal sediments and the Haqf Supergroup of Oman. The available zircon ages and paleomagnetic data of the Malani Igneous suite, along with the Marinoan glacial deposits, detrital zircon ages, and Ediacaran fossil elements of the Marwar Supergroup add significant information to the Neoproterozoic Earth history.

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印度次大陆的马里诺冰川作用 - 解剖学和全球影响

代表新元古代-下寒武统马尔瓦尔超群最基本单元的波卡兰巨石床的详细沉积学分析清楚地表明了其冰川起源。冰川沉积物被解释为冰接触海底扇沉积物。根据马尔瓦尔超群沉积物和层间火山碎屑沉积物的碎屑和继承的锆石群，为波卡兰巨石床设想了成冰纪的马里诺冰冻年代。冰期后沉积序列中保存完好的埃迪卡拉元素也支持马尔瓦尔超群的低温纪至早寒武纪时代。马尔瓦尔超群底部的冰川沉积加强了所研究的沉积物与小喜马拉雅 Blaini-Krol-Tal 沉积物和阿曼 Haqf 超群之间的区域相关性。马拉尼火成岩套的现有锆石年龄和古地磁数据，以及马里诺冰川沉积物、碎屑锆石年龄和马尔瓦尔超群的埃迪卡拉化石元素，为新元古代地球历史增添了重要信息。