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 brown clay calcareous calcined calcium carbonate celestite cent chalk charnockite collected colour contain Cretaceous Cretaceous strata Dalmia Cement deposits depth estimate fibrous calcite fluorine fossils Garudamangalam Geological Survey Gondwana Government of Madras gypsum gypsum area H₂O inch thick Insoluble J. A. Dunn K. R. Krishnaswami Karai Karai area layers limestone line of section Loss on ignition M. S. Krishnan manufacture manure Maruvattur material Memoir miles mineral Nambakkurichchi Neykulam occurs Odiyam phosphatic nodules pits plaster quantity quarrying ravines Red concretions salts sandstone sediments shows sodium soluble specimens stone strata strontianite strontium 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 washed yellow yield