The texture of the sandstone at the surface, where it comes in contact with the basalt, has in some places been altered by it, but in others it seems to have been as little changed as the habitations of the people who were suffocated by the ashes of Vesuvius in the city of Pompeii. I am satisfied, from long and careful examination, that the greater part of this basalt, which covers the tableland of Central and Southern India, must have been held for some time in suspension in the ocean or lake into which it was first thrown in the shape of ashes, and then gradually deposited. This alone can account for its frequent appearance of stratification, for the gentle blending of its particles with those of the sand near the surface of the latter; and, above all, for those level steps, or tables, lying one above another horizontally in parallel bars on one range, corresponding exactly with the same parallel lines one above another on a range twenty or thirty miles across the valley. Mr. Scrope's theory is, I believe, that these are all mere flowing _coulées_ of lava, which, in their liquid state, filled hollows, but afterwards became of a harder texture, as they dried and crystallized, than the higher rocks around them; the consequence of which is that the latter has been decomposed and washed away, while the basalt has been left to form the highest elevations. My opinion is that these steps, or stairs, at one time formed the beds of the ocean, or of great lakes, and that the substance of which they are composed was, for the most part, projected into the water, and there held in suspension till gradually deposited. There are, however, amidst these steps, and beneath them, masses of more compact and crystalline basalt, that bear evident signs of having been flows of lava.[l3]