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necting links between them and the hornblende rocks of the Satlej valley, are seen to possess common features. Hornblende is the most prominent mineral, constituting the great mass of the rock; quartz, in which a little triclinic felspar is interspersed being quite subordinate.
Garnets, generally of microscopic size, are frequently present. At Barela they are of large size, and abound both in the amphibolite and in the mica schists. Any number of them, of very perfect crystalline form, that have fallen out of the decayed schists, may be picked up on the roadside.
Red mica is very constantly present in the amphibolite and in many of the thin slices sphene abounds. When the latter mineral is not to be seen, magnetite is plentiful; but in the slices in which sphene occurs, magnetite is absent, and its place is taken by a little hæmatite.
Epidote may be seen sparsely in some of the slices.
The quartz is very pellucid, and I have only detected the presence of a few liquid cavities with moving bubbles. They were of extremely small size. Microliths of hornblende were abundant in it.
This rock has evidently been subjected to extreme metamorphism, and it is impossible to determine the character of the original rock from the microscopic examination of these amphibolites.
On the identity of the Olive Series in the east, with the Speckled Sandstone in the west, of the Salt Range, in the Punjab, by DR. H. WARTH.
In February last, during a short period of leave, I made a trip to the Salt Range chiefly with the view of extending the observations which gave rise last year to such interesting geological discussions, both local and general;1 and I was so fortunate as to make a fresh find of fossils which, with other observations, must be taken to determine the identity of the Speckled Sandstone (paleozoic) with the Olive series of the eastern sections, hitherto taken to be cretaceous.
The crystalline boulder-bed in the Nilawán forms the base of Wynne's Speckled Sandstone series. It is only feet thick, but some boulders are about 2 feet in diameter. Amongst the boulders and pebbles of crystalline rock there occurs a minute proportion of pebbles consisting of soft bluish rock and some of which contain fossils, Conularia, Serpulites, etc. Such pebbles were found in the boulder bed on the left and on the right sides of the Nilawán gorge opposite the Salt mine, also to the right near the mouth of the gorge. Inside of the gorge the strata observed were the purple sandstone, then the boulder-bed, above that greenish sandstone, then very thick beds of the red sandstone (Wynne's 'Speckled') overlaid by lavender clays and more recent beds. Near the mouth of the gorge there was also seen a remnant of the Magnesian Sandstone, 10 feet below the boulder-bed, recognized by the peculiar lenticular markings described by Wynne at pages 88 and 153 in the Salt Range memoir. About 50 feet lower the Neobolus shales were also recognized by the minute white shells which Mr. Wynne first discovered in them at other Mem. Geol. Surv. Ind., Vol. XIV.