Records of the Geological Survey of India, Volume 42, Part 2

Front Cover
Government of India, 1912 - Earthquakes
Includes the "Annual report of the Geological Survey of India," 1867-

From inside the book

Other editions - View all

Common terms and phrases

Popular passages

Page 96 - The flora of the Dakota group; a posthumous work, edited by FH Knowlton. US Geol.
Page 89 - ... as the result of this he has obtained evidence supporting the former supposition, and has succeeded in tracing out the position of gentle synclines and anticlines striking north by west and south by east. The probable truth of the explanation of these dips as due to post-Deccan Trap tectonic disturbances is supported by several marked dips observed by Dr. Fermor on descending the edge of the Deccan Trap plateau by the Ramakona ghat.
Page 81 - The Siwaliks dip into the hills and have the customary appearance of being overlain by the Himalayan Gondwanas, the next series met with. Unfortunately no actual contact of the two systems was seen, but there is no doubt that it is the same here as elsewhere. The, commonest rock types in this series are white and greyish-white, indurated sandstones and quartzites, reddish ferruginous shales, black carbonaceous shales, often with clay-ironstone septarian nodules, hardened, greyish -blue shales in...
Page 82 - There are also later intruded, large, rugged and grotesque masses of Idar granite (biotite and hornblende granite) and of quartz-porphyry bursting irregularly through the region regardless of the older series. Long sinuous dykes of vein-quartz (ultra-acid differentiation products of the Idar granite ?) and one or two examples of a basic dyke (olivine-gabbro or dolerite), together with a contact, composite or hybrid rock, between the latter and the Idar granite, were also identified and mapped. Of...
Page 87 - Babu Bankim Bihari Gupta, recently promoted from the post of Museum Assistant to one of the newly sanctioned posts of Field Collector, was also sent with this party in order to collect a typical series of Chhindwara rocks. The first area selected for survey comprises, on the northern line, the districts of Betul and Chhindwara as far north as the Satpura coalfields, and the districts of Seoni and Mandla as...
Page 89 - The flows are numbered serially 1 to 4 from below upwards, flow 1 being the true basal flow in this area, as it rests directly upon the Chhindwara granite. With the exception of flow 2, all have normally the texture of basalts, but any flow may be exceptionally more coarse-grained, ie, doleritic. Flow 2 is, however, usually a crystalline dolerite, and if any flow were to prove intrusive, it should be this one.
Page 80 - Pascoe : column that left Kohima early in January for a visit to Makwari on the Assam-Burma border. The greater part of the traverse, which was some 85 miles in length, lay over a monotonous sequence of Disang shales and slates with little to relieve it save occasional lenticles of quartz. Among the Disang beds, between Dimapur and Kohima, was recognised the Naogaon sandstone of Mallet forming the peaks of Eadiuba and Siwenuchika.
Page 87 - Balaghat plain on the south, across the Chhindwara plateau (2,200-ft.) in the middle, to the Mahadeo Hills bounding the southern edge of the Narbada valley on the north and frequently rising to elevations of over 3,000 feet. It is expected that a detailed survey of this district will furnish the key to the structure both of the Satpura Hills, which traverse the northern line of districts, and of the Archeoan plains comprising the larger portion of the southern districts.
Page 82 - Rajputana and north of Kishen Singh's mapped areas in parts of Bombay. He completed a welldefined area of about 729 square miles, lying centrally within sheets 118 to 120 and 144 to 146 of the Bombay 1
Page 76 - , , the site of the head-works of the bimla hydroelectric installation, where galena and stibnite were said to occur. Specimens said to represent deposits of each had been sent previously to the Geological Survey Laboratory, but had proved to be only galena, no ore of antimony occurring among them. The latter was said to have been found on the left bank of the Nauti Khad just above the flume, and two mule-loads of ore were aa d to have been taken away.

Bibliographic information