The Quarterly journal of the Geological Society of London . layer of pebbles (No. 2) for the most part black and ofEocene age, with greywether pebbles and subangular flints deriveddirectly from the chalk. No. 3 consists of a sandy-grey andreddish Brick-earth, the thinning away of which causes the layer ofgravel above (No. 4), containing shells and mammalian remains, tocoalesce with No. 2. No. 4 is composed of subangular and Eoceneflints ; it contains calcareous concretions, and is in places its top is the principal mammalian bed in the pit (No. 5), con-sisting of loamy chocolate
The Quarterly journal of the Geological Society of London . layer of pebbles (No. 2) for the most part black and ofEocene age, with greywether pebbles and subangular flints deriveddirectly from the chalk. No. 3 consists of a sandy-grey andreddish Brick-earth, the thinning away of which causes the layer ofgravel above (No. 4), containing shells and mammalian remains, tocoalesce with No. 2. No. 4 is composed of subangular and Eoceneflints ; it contains calcareous concretions, and is in places its top is the principal mammalian bed in the pit (No. 5), con-sisting of loamy chocolate-coloured Brick-earth, full of calcareous con-cretions and shells. Above this is 8 feet of fine stratified sands(No. 6), with an abundance of the usual freshwater shells. Eestingunconformably on this is an irregular reddish-sandy contorted stratum(No. 7), full of large flints, both angular and waterworn, and ofquartz pebbles. The confusion of its bedding is a remarkable surface-contrast to the horizontality of the beds below. Above this is theson (No. 8).. —Section at Stonehamh Pit, Crayford. Surface-soil, from 1 to 2 feet. Irregular bed of reddish sand, with flints and quartz pebbles, 4 feet. Fine stratified sands, 8 feet Loamy chocolate-coloured brick-earth, 5 feet. Gravel, from 1 in. to 2 feet. Sandy grey and reddish brick-earth, 2 feet 6 inches. Irregular layer of pebbles, from 1 to 2 feet. s^\ Eed and grey loam, 10 feet. Thanet Sand. Chalk, In this section also the threefold condition of the beds, indicative 1867.] DAWKINS LOWER BRICK-EARTHS. 97 of different circum stances of deposit, is observable. Its discrepancywith the admirable section given in 1838 by Professor Morris maybe explained by the variability of the beds in the enormous top of the Brick-earth is about 50 feet above the alluvium of theThames. ^. Erith. The second brick-pit is situated on the right-handside of the road from Erith to Crayford, immediately after it hascrossed the North Kent Railway, a
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Keywords: ., bookcentury1800, bookdecade1840, bookidquarte, booksubjectgeology
