cover image: Memoirs of the Geological Survey of India. on the Geological Structure of Parts of the Districts of Salem  Trichinopoly and South Arcot  in Madras Presidency

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Memoirs of the Geological Survey of India. on the Geological Structure of Parts of the Districts of Salem Trichinopoly and South Arcot in Madras Presidency

1864

The general relative position of the geological formations to the descent of the Donutraketawands the Bay of Bengal is exhibited in the accompanying section from Salem to Negapatam (Plate II), on the scale of four miles to the inch. [...] These are, the valley of the Topoor river, up which the Mulliapooram Ghat leads to the small station of Ercadu or Yercaud; and that of the Vaniaur river, a tributary of the Runniar, which drains by far the greater part of the Shevaroys. [...] The back bone of the western of the two great lobes into which the mass of the Shevaroys is divided by the Vaniaur ravine, is formed by the " Green Hills" ridge, and is by far the most elevated portion, and also forms the water shed of the whole mountain mass. [...] Along this side of the delta, as well as on the north bank of the Cauvery, west of Seringham Island, the alluvial boundary, owing,O the more gentle rise of the country (except in the neighbourhood of the rug- ged granitic ridges of lrungaloor, and the spread of granitoid metamor- phic rocks to the eastward) and the uniform character of the rocks across lluvium of the tri- which the tributaries hav [...] In many places the limit of wet cultivation coincides with the' boundary of the alluvium, in others it has crossed Cultivatioa of the allu- vium and covered up the natural line of boundary, ren- The most southerly branch in the delta which, according to the map, leaves the Cau- very a little to the west of Tanjore, and crosses the limits of the map (79), is an artificial_ feeder of the great tank
agriculture environment
Pages
163
Published in
India
SARF Document ID
sarf.100011
Segment Pages Author Actions
Frontmatter
i-vii Thomas Oldham view
Chapter I.—General Sketch of Area
1-24 Thomas Oldham view
Chapter II.—Alluvial Deposits and Blown Sands
25-33 Thomas Oldham view
Chapter III.—Post-Cretaceous Rocks.—(Cuddalore Sandstones.)
34-46 Thomas Oldham view
Chapter IV.—Metamorphic Rocks
47-105 Thomas Oldham view
Chapter V.—Crystalline Rocks
106-119 Thomas Oldham view
Chapter VI.—Superficial Deposits and Soils
120-139 Thomas Oldham view
Chapter VII.—Physical Changes Now in Progress
140-144 Thomas Oldham view
Chapter VIII.—Economic Geology
145-154 Thomas Oldham view

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