. Bulletin of the British Museum (Natural History), Geology. A RE-CONSIDERATION OF THE GALLEY HILL SKELETON 31 of the Galley Hill school and adjoining the London road, there still remains a narrow shelf of unworked Chalk from which it is possible to reach an overgrown section of the gravels close to the site where the skeleton was found. This is the face which was photographed by Clement Reid about 1894 (Fig. 3). In the autumn of 1948 Mr. A. J. Thomas, who until recently was Deputy Manager of the Swanscombe Cement Works (Associated Portland Cement Manufacturers Ltd.), which occupy the Gravels
. Bulletin of the British Museum (Natural History), Geology. A RE-CONSIDERATION OF THE GALLEY HILL SKELETON 31 of the Galley Hill school and adjoining the London road, there still remains a narrow shelf of unworked Chalk from which it is possible to reach an overgrown section of the gravels close to the site where the skeleton was found. This is the face which was photographed by Clement Reid about 1894 (Fig. 3). In the autumn of 1948 Mr. A. J. Thomas, who until recently was Deputy Manager of the Swanscombe Cement Works (Associated Portland Cement Manufacturers Ltd.), which occupy the Gravels of 250 NEW CRAYLANDS LANE PIT Fig. 2. Map of Galley Hill, Swanscombe, showing present distribution of loo-ft. terrace gravels on the Chalk, and the site where the human skeleton was found in 1888. (Based on 25-inch Ordnance Survey Map, igsg revision, and on 6-inch Geological Survey Map igso.) floor of this disused pit, kindly arranged to have part of the section cleared so that the deposits could be re-examined (PI. 4 b). The gravels which cap the Chalk on Galley Hill are part of a broad dissected sheet of stratified fluviatile gravels, sands, and loams which belong to the so-called Boyn HUl, or loo-ft. terrace of the Lower Thames (Fig. i). These deposits attain a maximum thickness of about 40 ft. in the region of Barnfield pit nearly half a mile to the south- west, and they evidently lie within a broad asymmetric channel (Fig. 4) cut partly in Thanet Sand, but mainly in Chalk, trending west to east, and with its deepest portion cut to about 75 ft. This channel was eroded and then silted-up by the Thames when the river meandered far to the south of its present course, and when the land stood more than 50 ft. lower in relation to sea-level than at the present day. The Chalk floor of the channel rises gently northwards from Barnfield pit, and at Galley HUl, where it is 83 to 90 ft. above , it is covered by only 6-12 ft. of deposits. Undis- turbed fluvi
Size: 1909px × 1309px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorbritishmuseumnaturalhistory, bookcentury1900, bookcoll
