naa a22 4500 51075659X CHVBK 20180411083124.0 cr unu---uuuuu 180411e20131001xx s 000 0 eng 10.1007/s12594-013-0161-0 doi (NATIONALLICENCE)springer-10.1007/s12594-013-0161-0 Calcareous algal association from the Lower Paleozoic Tethyan sedimentary sequence of the Shiala Formation, Indian Gondwana [Elektronische Daten] [H. Sinha, C. Trampisch] 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. Geological Society of India, 2013 Shiala Formation nationallicence Tethyan-Tibetan sequences nationallicence calcareous algae nationallicence microfacies nationallicence Ordovician-Silurian nationallicence Tarim basin nationallicence Sinha H. Department of Geology, Vinoba Bhave University, 825 301, Hazaribag, India aut Trampisch C. Institute of Geography and Geology, Department of Paleontology and Historical Geology, University of Greifswald, Greifwald, Germany aut Journal of the Geological Society of India Springer India 82/4(2013-10-01), 339-350 0016-7622 82:4<339 2013 82 12594 https://doi.org/10.1007/s12594-013-0161-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12594-013-0161-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sinha H. Department of Geology, Vinoba Bhave University, 825 301, Hazaribag, India aut NATIONALLICENCE 700 1- Trampisch C. Institute of Geography and Geology, Department of Paleontology and Historical Geology, University of Greifswald, Greifwald, Germany aut NATIONALLICENCE 773 0- Journal of the Geological Society of India Springer India 82/4(2013-10-01), 339-350 0016-7622 82:4<339 2013 82 12594 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer