Records of the Geological Survey of India, Volume 142, Part 4
Vols. 1- include Report of the Geological Survey, 1867- ; v. 32- include Review of the mineral production of India, 1898/1903- ; v. 75 consists of Professional papers, no. 1-16; v. 76 consists of Bulletins of economic minerals.
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active alignment amphibolite analysis anorthosite arsenic Arunachal Pradesh Assam bands Barail basic biotite block campaign carried clay coarse grained Code collected Complex comprises construction core covered depth Detailed Dibang dipping DIVISION drill East Khasi Hills exposed fault field season fold foliation follows Formation geological mapping geotechnical grade granite gneiss granulite gravity grey Group Hazard holes includes indicates joints Khasi Hills district Landslide located Lower Dibang Valley mainly major mapped area medium Meghalaya minerals moderately monitoring observed occur pink places plagioclase porphyritic granite proposed quartz quartzite ranges recorded REGION REVIEW Ri-Bhoi river road rocks samples sandstone scale schist sediments shale shear Shillong shows sillimanite siltstone slope soil stage stations structures studies surface taken thick toposheet trend valley weathered zone का किया गया की के क्षेत्र तथा मानचित्रण में है