The Quarterly journal of the Geological Society of London . t on the other side of thehedge Mr. Crawshay lias obtained five specimens. They are of a dark yellowcolour, very much rolled and worn, and seem to me derived either from tliePlateau drift, or from a high-level valley gravel such as that at Snag of the specimens was found at a depth of 16 feet, close on the Chalk. § Quart. Journ. Geol. Soc. vol. xxxvi. (188U) p. 544. II It seems as much related to the Oxted Valley as to that of the Darent, butsubsequent denudation may have caused this, and in any case there is a closeconnexion
The Quarterly journal of the Geological Society of London . t on the other side of thehedge Mr. Crawshay lias obtained five specimens. They are of a dark yellowcolour, very much rolled and worn, and seem to me derived either from tliePlateau drift, or from a high-level valley gravel such as that at Snag of the specimens was found at a depth of 16 feet, close on the Chalk. § Quart. Journ. Geol. Soc. vol. xxxvi. (188U) p. 544. II It seems as much related to the Oxted Valley as to that of the Darent, butsubsequent denudation may have caused this, and in any case there is a closeconnexion with the Limpsfield gravel. See also Geology of the Weald,p. 194. 146 PEOF. TEESTWICII ON THE AGE, FORMATION, AND bed, but the two beds are nowhere seen in superposition. Thebrick-earth attains its greatest height at Gibbs Farm and Trenchleys,rising there above the 500-feet contour-liue, while it extends ^ milewestward to Westheath at about the same level, but it is not workedat these places. Fig. 7.—Section at the Briclc-earth pit, Limpsfield c. Weathered surface, bleached 1 foot. c Disturbed brick-earth [^ . c. Undisturbed brick-earth, mi stratified, 4. Lower Green sand—a soft loamy grit. ith angular 8 to 10feet. This brick-earth is very stony, and no fossils of any sort havebeen found in it. Unlike the gravel, the rock-debris in it consistsin greater part of angular fragments of the Chert, Eagstone, andIronstone (with some of the latter subangular and of large size),from the Lower Greensand to the south of the pit, mixed withwhich are angular and subangular flints, and Tertiary flint-pebblesderived from the gravel on the north. These are scattered irregu-larly and at all angles through the brick-earth. The bed exhibitspossible glacial influences, not only in the irregular distribution ofthe stony debris, but also in its indented surface, which shows dis-turbance b}^ action from above (may be floating ice), causingcontortion of the bed, and which has
Size: 2955px × 846px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1840, bookidquarte, booksubjectgeology
