NDLI: Calcareous algal association from the Lower Paleozoic Tethyan sedimentary sequence of the Shiala Formation, Indian Gondwana

Content Provider	Springer Nature Link
Author	Sinha, H. N. Trampisch, C.
Copyright Year	2013
Abstract	The Lower Paleozoic rocks of the Shiala Formation of the Tethyan-Tibetan sedimentary sequence of Uttarakhand Garhwal region reveals rich and moderately diverse assemblages of calcareous algae. These assemblages include Dysoporelleae, Cyclocrinitids, Solenoporaceans, Microproblematica and cyanobacteria. Seven species have been identified. Most of the taxa described here are reported for the first time from the Shiala Formation. This formation exposes six different microfacies types. Some of the calcareous algal association occurs in different microfacies types and they are not generally facies dependent.The presence of calcareous algal age marker forms in the Shiala Formation brackets the upper age limit as Silurian and it is consistent with earlier age as assigned by acritarch biostratigraphy. The recovered flora is broadly comparable with that of the Tarim basin of China, Uzbekistan, Ontario, Scotland, Kazakhstan, Poland, Baltica etc. A possibility of regional link between the present study area and Tarim basin during Ordovician-Silurian time can not be envisaged based on floral similarity of the two basins due to their cosmopolitan affinity in Gondwana, Laurentia, Siberia, Kazakhstania etc. The recovered flora is basically from the euphotic zone(within few dozen meters) of coastal to lagoonal, low to high energy marine waters of deposition in a tropical to warm-temperate palaeoprovince of Ordovician-Silurian time.
Starting Page	339
Ending Page	350
Page Count	12
File Format	PDF
ISSN	00167622
Journal	Journal of the Geological Society of India
Volume Number	82
Issue Number	4
e-ISSN	09746889
Language	English
Publisher	Springer India
Publisher Date	2013-10-13
Publisher Place	India
Access Restriction	Subscribed
Subject Keyword	Shiala Formation Tethyan-Tibetan sequences calcareous algae microfacies Ordovician-Silurian Tarim basin Geology Hydrogeology
Content Type	Text
Resource Type	Article
Subject	Geology

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