XXV.—Boulder-clay, a Marine Deposit. Part second

Abstract

Since my previous communication to the Society in December of last year, I received from time to time from Mr. James Neilson further supplies of the Boulder-clay from the vicinity of Glasgow, for microscopical examination. They numbered in all eleven packets, five being from localities not previously examined. Before examining these clays I divided each of the parcels into two and treated them separately, which was done as a precaution against risk of accident. For want of time I have been unable to get through all the material sent; half of the clay from Hamilton Hill, west corner, and middle of quarry, also that from Shawlands, remains to be examined. I have also a packet from Robroyston not yet looked at. About ninety pounds weight of Boulder-clay from ten different localities in the neighbourhood of Glasgow has now been investigated, and in each specimen Foraminifera have been found. They appear, however, to be very irregularly distributed throughout the clay; for instance, in a sample from Hamilton Hill, five pounds in weight, which was divided into two parts, each examined separately, the first yielded a hundred specimens and the other only two. At this spot the Foraminifera were far more plentiful than at any of the other stations, as many specimens being found as at all the other places put together. Two other gatherings taken from this quarry gave rather poor results; in one from the west corner only a single specimen was obtained, and in the other, from the middle This 250-word extract was created in the absence of an abstract