Ch. XIII.] 



CRAG OF NORFOLK. 



179 



represented, is 24 feet in height. Some of the layers in 6, 6, 

 are composed of pebbles, and these alternate with thin beds 



No. 40. 



Section east ofSherringham, Norfolk, 

 a, Sand, loam, and blue clay. b } b, Sand and gravel, c, Twisted beds of loam. 



of loose sand. The whole set must once have been horizontal, 

 and must have moved in a mass, or the relative position of 

 the several parts would not have been preserved. Similar 

 appearances may, perhaps, be produced when chasms open 

 during earthquakes and portions of yielding strata fall in from 

 above and are engulphed. 



Protruded masses of chalk. But whatever opinion we may 

 entertain on this point, we cannot doubt that subterranean 



No. 41 . 





Sea 



Side view of a promontory of chalk and crag, Trimmingham, Norfolk. 



a, Gravel and ferruginous sand, rounded and angular pieces of chalk flint, with 



some quartz pebbles, 3 feet. 



b, Laminated blue clay, 8 feet. c, Yellow sand, 1 foot C inches. 

 (I, Dark blue clay with fragments of marine shells, 6 feet. 



e, Yellow loam and flint gravel, 3 feet. /, Light blue clay. 1 foot. 



ff, Sand and loam, 12 feet. 



h t Yellow and white sand, loam, and gravel, about 100 feet. 



N 2 



