. The Quarterly journal of the Geological Society of London. eds, or groups of strata, it may be mostconvenient to take them in their natural or ascending order, and forfacility of reference to number them throughout consecutively. Description of the minor Subdivisions of the Cretaceous Strata asseen in the Beer-Head* and adjacent Sections (fig. 1). Bed 1.—Greenish sandy argillaceous strata. Including often,near its base, a grit-bed of minute subangular pebbles, or frag-ments of the underlying rocks. Thickness variable, usually a few feet only: 3 ft. at WhiteCliff, 3| ft. at Dunscombe, 2| feet
. The Quarterly journal of the Geological Society of London. eds, or groups of strata, it may be mostconvenient to take them in their natural or ascending order, and forfacility of reference to number them throughout consecutively. Description of the minor Subdivisions of the Cretaceous Strata asseen in the Beer-Head* and adjacent Sections (fig. 1). Bed 1.—Greenish sandy argillaceous strata. Including often,near its base, a grit-bed of minute subangular pebbles, or frag-ments of the underlying rocks. Thickness variable, usually a few feet only: 3 ft. at WhiteCliff, 3| ft. at Dunscombe, 2| feet at Salcombe Hill. Prevailing fossil—Exogyra conica (small var.). * The sections here referred to as adjacent sections are :—those of White Cliffand Beer ; the Southdown Undercliff, or landslip of 1789 ; the cliffs at Brans-combe Mouth, Weston Mouth, Dunscombe, Salcombe^ and Sidmouth. Chalk. BEEB HEAD AND THE ADJACENT CLIFF-SECTIONS. Fig. 1.—General Section. Scale 48 ft. to the 371 Upper (?)u_ A \ Lower Chalk Marl Chloritic Marl -I. Upper Greensand .. Gault (?) 5 | | 1 1 Beer Stone. Phosphate-bed. T^^T^r. a- ><WXXXXXX*XX %K XXXXX- =©= Warminster beds.
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Keywords: ., bookcentury1800, bookdecade1840, bookidquarte, booksubjectgeology
