Records of the Geological Survey of India, Volume 77, Issue 9

100 cubic feet A. L. Coulson abundant Alluvium Ammonites amount analyses Archaean Ariyalur average Ayinapuram B. C. Roy beds Belemnites bore-hole records brown clay calcareous calcined calcium carbonate celestite cent chalk charnockite Chittali collected colour contain Cretaceous Cretaceous rocks Cretaceous strata Dalmia Cement deposits depth estimate fibrous calcite fluorine fossils Garudamangalam Geological Survey Gondwana Government of Madras gypsum gypsum area H₂O inch thick J. A. Dunn Karai Karai area layers limestone line of section Loss on ignition M. S. Krishnan manufacture manure Maruvattur material Memoir mile mineral Nambakkurichchi Neykulam occurs Odiyam phosphatic nodules pits plaster quantity quarrying ravines Red concretions salts sandstone sediments sheets shows sodium soluble specimens stone strata strontianite strontium sulphate superphosphate surface nodules Survey of India Terani Trichinopoly Trichinopoly Mining Ugalur section Utatur Uttattur area Uttattur stage Uttattur strata Varaguppadi veins village Warth yellow yield