. The Quarterly journal of the Geological Society of London. felspar-laths.(See p. 326.) 6. Portion of the same : X 90. Felspar-laths; vesicles (?) filled with chlorite ; groundmass. Plate XXXIV. Map of part of South-Central and South-Eastern England, on the scale of10 miles to the inch, or 1: 633,600. The contour-lines give the estimated depth of the base of the marine Mesozoic-strata (Gault or Jurassic) aboTe or below Ordnance datum. To the the dotted line (approximate south-eastern limit of Trias) they are alsocontour-lines of the Palaeozoic floor. The localities to which the
. The Quarterly journal of the Geological Society of London. felspar-laths.(See p. 326.) 6. Portion of the same : X 90. Felspar-laths; vesicles (?) filled with chlorite ; groundmass. Plate XXXIV. Map of part of South-Central and South-Eastern England, on the scale of10 miles to the inch, or 1: 633,600. The contour-lines give the estimated depth of the base of the marine Mesozoic-strata (Gault or Jurassic) aboTe or below Ordnance datum. To the the dotted line (approximate south-eastern limit of Trias) they are alsocontour-lines of the Palaeozoic floor. The localities to which the numbers on the map refer are enumerated in thetable on p. 339. The figures at the side, if not followed by a letter, denote thedepth below of the Palaeozoic floor immediately beneath marine Mesozoicstrata; when followed by a , they denote the depth below at whichmarine Mesozoic strata rest upon Trias ; when followed by a J, they denotethe depth below at which the boring ended in Jurassic strata. Quart. Journ. Geol. Soc. Vol. LXIX, ?%?? 17
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectgeology, bookyear1845
