. Geological magazine. Fig, 1. In the above rough diagram (Fig. 1) the lower fresh-water seriesis seen in the neighbourhood of Corfe, and forms part of the cliffs atStudland. It is marked by beds of pipe-clay, and has a thickness of200 feet or more. Near Corfe and Studland the middle fresh-water series is met with,forming the whole thickness of the cliffs between Poole Harbour andBournemouth,—the section being four miles long and 100 feethigii. Their entire thickness cannot yet be accurately stated, butmay be put down at some 300 feet. They are characterized by thefact that the clays contained
. Geological magazine. Fig, 1. In the above rough diagram (Fig. 1) the lower fresh-water seriesis seen in the neighbourhood of Corfe, and forms part of the cliffs atStudland. It is marked by beds of pipe-clay, and has a thickness of200 feet or more. Near Corfe and Studland the middle fresh-water series is met with,forming the whole thickness of the cliffs between Poole Harbour andBournemouth,—the section being four miles long and 100 feethigii. Their entire thickness cannot yet be accurately stated, butmay be put down at some 300 feet. They are characterized by thefact that the clays contained in them are usually 132 Reports and Proceedings— The next series above is a marine series, and is some 400 or 500feet thick. The base beds are dark sands and clays, succeeded bypebble-beds and sands, then more sandy clays with pebbles, andending with a thick deposit of white sands. This marine portion ofthe series occupies the cliffs between Boscombe and High Cliff. Plain as this order of deposition appears, we have collateral proofthat this interpretation is right, for at Alum Bay there is a completesection of the whole of these beds, although somewhat thinned out,and upheaved vertically. We see in succession the lower pipe-clays,the brilliant sands, the darker clays, sands, pebble-beds, one after theother, and can examine them all in detail within the space of a fewhundred yards. The thick pipe-clays and quartzose grits which we find at thebottom of the series can without the slightest hesitation be referredto the result of the wearing away of granite rock.
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Keywords: ., bookauthorwoodward, bookcentury1800, bookdecade1870, bookyear1877
