. The Quarterly journal of the Geological Society of London. ons of Beccles, for example, show Chalky-Kimeridgic Boulder Clay resting on Chillesford Beds down in thevalley at about 30 feet and upon the Contorted Drift, a mileto the south, at about 70 feet Aide Valley.—The Boulder Clay extends down into theMarlesford and Saxmundham tributary valleys, and is seen inpits at Blaxhall, on the banks of the main stream, as a valley-deposit at 50 feet Butley Valley.—The stream occupying this is now reallytributary to the Aide ( = Ore) at Orford, and the famous Chillesford-Church pit, at
. The Quarterly journal of the Geological Society of London. ons of Beccles, for example, show Chalky-Kimeridgic Boulder Clay resting on Chillesford Beds down in thevalley at about 30 feet and upon the Contorted Drift, a mileto the south, at about 70 feet Aide Valley.—The Boulder Clay extends down into theMarlesford and Saxmundham tributary valleys, and is seen inpits at Blaxhall, on the banks of the main stream, as a valley-deposit at 50 feet Butley Valley.—The stream occupying this is now reallytributary to the Aide ( = Ore) at Orford, and the famous Chillesford-Church pit, at just less than 50 feet , shows the Upper Driftresting on estuarine Chillesford Clay and Sands. Deben Valley.—Of numerous sections, that at WickhamMarket may be cited, where there was a brickyard in BoulderClay down in the valley at less than 50 feet Gripping Valley.—This is the most typical of the Suffolkvalleys, both on account of its relatively large size and on accountof the sequence of strata which it exposes on its sides : that is, a. complete seriesfrom the Chalk tothe post-Glacialgravels. I havemapped a con-siderable portionof the valley onthe scale of t>inches to themile; and thiswork, togetherwith the very-large number ofexcellent sec-tions exposed inthe valley, hasbrought outmany interestingpoints. Almostany part of thevalley might bechosen, but a sec-tion across it nearBramford1 or Ips-wich (see fig. 1)is fairly , within asmall area, pitscan be examinedwhere the Boul-der Clay is seenresting on Chalk,Lower LondonTertiaries, Lon-don Clay, or Gla-cial Sands andGravels. The Boulder Clayforms the plateau-,land of Suffolkfrom 100 to 400feet , buthere in the valleyit is found at 30to 40 feet (Ipswich railway-cutting, Sprough-ton, and Bram-ford). The man-ner in which the 1 Boswell, 1912(33) p. 235 & map,pi. xxxiv. Vol. 69.] THE AGE OE THE SUFFOLK VALLEYS. 589 Boulder Clay extends down into the small tributary valleys andsometimes thic
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectgeology, bookyear1845
