The Quarterly journal of the Geological Society of London . f the Quaetzite-geavel to Geavelsor Local Oeigin. In the neighbourhood of Goring and Pangbourne the Quartzite-gravel is closely associated with deposits of a wholly differentcharacter and origin. On the western slopes of the Chilterns there is a spread of gravelconsisting almost wholly of flint, and mostly angular or subangular,which ranges from Little Stoke and Ipsden in a northerly directionto the neighbourhood of Watlington, as shown in the accompanyingsketch-map (PI. XXVIII). It occupies a plateau at a height ofabout 350 feet abov
The Quarterly journal of the Geological Society of London . f the Quaetzite-geavel to Geavelsor Local Oeigin. In the neighbourhood of Goring and Pangbourne the Quartzite-gravel is closely associated with deposits of a wholly differentcharacter and origin. On the western slopes of the Chilterns there is a spread of gravelconsisting almost wholly of flint, and mostly angular or subangular,which ranges from Little Stoke and Ipsden in a northerly directionto the neighbourhood of Watlington, as shown in the accompanyingsketch-map (PI. XXVIII). It occupies a plateau at a height ofabout 350 feet above sea-level, and about 200 feet above the riverThames, in places forming a deposit 10 or 14 feet thick. It isworked for road-material north and south of Ewelme, and at TurnersCourt, near Waliiugford. At the latter place the excavation is carried down to a reddish,coarse, sandy loam. At one point, however, the bottom was seento consist of a fine rubble of flint and chalk. The gravel is offlint, with the exception of a few fragments of sarsen- or 596 ME. 0. A. SHETJBSOLE ON SOME HIGH-LEVEL [NoY. 1898, There are scarcely any pebbles, and the flint-fragments are usuallyangular. They are whitish externally, and mostly black and greyinternally. The gravel shows little, if any, sign of stratification, thegeneral arrangement being a series of whorls or curves. In placesnear the base patches of gravel in a chalky paste occur, as shown inthe appended sketch (fig. 2). These chalky patches resemble, although Pig. 2.—Turners Court gravel-pit, Wallingford. [Height of section = 12 feet.]a = Unstratified angular flint-grayel in ocbreous = Similar gravel in marly paste. on a smaller scale, those occurring in stratified gravel at TilehurstEoad, Eeading, described in a former paper.^ I am inclined tothink that, in some cases, these chalky patches may be due to theirregular action of solvents subsequent to the formation of thegravel. At Goulds Grove, between Turners Court and
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