MN 
APPENDIX. 313 
and the limestone (4); no faults or contortions of these strata are 
met with anywhere; the boundaries are simply boundaries of erosion. 
No change of hthologieal character of importance takes place, but the 
distinction between the quartzite (No. 1) and the slates (a) becomes 
difficult to carry out, and has, therefore, not been attempted to the 
westward of the village of Sowtapully. The general dark purplish 
or brown color of these slates, or rather shales (for no traces of cleavage 
is seen where the beds are not contorted), is less continuously met 
with; and paler colors prevail as a rule. Altogether, an area of very 
considerable disturbance is followed by an area over which the members 
of the younger metamorphic rocks have been subjected to no contorting 
action. They dip at angles so gentle that these may well be the original 
angles of deposition, the scarps and outliers now observable along the 
north-western margins of the area being merely results of erosion 
acting strongly on the underlying coarsely crystalline granitoid gneiss. 
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