naa a22 4500 510755984 CHVBK 20180411083122.0 cr unu---uuuuu 180411e20130701xx s 000 0 eng 10.1007/s12594-013-0116-5 doi (NATIONALLICENCE)springer-10.1007/s12594-013-0116-5 Facies controlled synaeresis cracks in mixed siliciclastic-carbonate sediments of Middle Jurassic of Patcham Island, Kachchh, Western India [Elektronische Daten] [Satish Patel, Jaquilin Joseph, Nishith Bhatt] Synaeresis cracks are observed at different stratigraphic levels in shallow marine mixed siliciclastic-carbonate sediments of the Middle Jurassic rocks of the Patcham Island, Kachchh, Western India. Cracks are preserved as cast or grooves in micritic sandstone of the Kuar bet member of Kaladongar Formation and sandy allochem limestone of the Raimalro Limestone member of Goradongar Formation. It bear distinct morphology of simple, straight to gently curved, spindle-shaped, irregular, unbranched to branched at acute angle; interconnected curlicue forms of non-orthogonal pattern. The X-radiography shows sharp margin and tapering twigs which support to nullify the possible biogenic origin. These cracks are developed at sediment-water interface and sediment-sediment interface in aqueous conditions, where partial dewatering of sediments causes reduction of sediment volume and loss of plasticity. Formation of cracks are also post-depositional phenomenon operated during initial phase of diagenesis where induced stress is generated due to compaction of sediments and neomorphism/recrystallisation of the susceptible carbonate grains. Geological Society of India, 2013 Synaeresis cracks nationallicence Shallow marine nationallicence Sandy allochemic limestone nationallicence Middle Jurassic nationallicence Kachchh nationallicence Gujarat nationallicence Patel Satish Department of Geology, The M. S. University of Baroda, 390 002, Sayajiganj, Vadodara, India aut Joseph Jaquilin Department of Geology, The M. S. University of Baroda, 390 002, Sayajiganj, Vadodara, India aut Bhatt Nishith Department of Geology, M.G. Science Institute, 380 009, Navrangpura, Ahmedabad, India aut Journal of the Geological Society of India Springer India 82/1(2013-07-01), 9-14 0016-7622 82:1<9 2013 82 12594 https://doi.org/10.1007/s12594-013-0116-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12594-013-0116-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Patel Satish Department of Geology, The M. S. University of Baroda, 390 002, Sayajiganj, Vadodara, India aut NATIONALLICENCE 700 1- Joseph Jaquilin Department of Geology, The M. S. University of Baroda, 390 002, Sayajiganj, Vadodara, India aut NATIONALLICENCE 700 1- Bhatt Nishith Department of Geology, M.G. Science Institute, 380 009, Navrangpura, Ahmedabad, India aut NATIONALLICENCE 773 0- Journal of the Geological Society of India Springer India 82/1(2013-07-01), 9-14 0016-7622 82:1<9 2013 82 12594 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer