. Geology of parts of Wiltshire and Gloucestershire, (sheet 34). , and in the deep cuttings of the Great WesternRailway in the Golden Valley. The Inferior Oolite frequentlyforms tabulated spurs bounded by abrupt banks which areplanted with beech trees and pines; of such there are goodexamples in Slaughterford Valley. The following subdivisions jnay be observed in this district,and can be distinguished both by lithological and fossilcharacters:— Inferior Oolite. Rodborough Common. Upper ragstone. (Clypeus grit.) Coarse rubbly white oolite, withTerebratula globata, Clypeus, Serpula . _ Lower rag
. Geology of parts of Wiltshire and Gloucestershire, (sheet 34). , and in the deep cuttings of the Great WesternRailway in the Golden Valley. The Inferior Oolite frequentlyforms tabulated spurs bounded by abrupt banks which areplanted with beech trees and pines; of such there are goodexamples in Slaughterford Valley. The following subdivisions jnay be observed in this district,and can be distinguished both by lithological and fossilcharacters:— Inferior Oolite. Rodborough Common. Upper ragstone. (Clypeus grit.) Coarse rubbly white oolite, withTerebratula globata, Clypeus, Serpula . _ Lower ragstone. I^elly limestone, rather Sandy, and irregularlybedded, with casts of Trigonia costata, Gryphcea Buckmani - Upper freestone Compact oolitic freestone, quarried for buildingpurposes . Oolite marl. Cream-coloured marl and chalky limestone, cha-racterized by Terebratula fimbria . - . Lower freestone. Massive, fine grained oolite, false bedded;becoming coarser and somewhat sandy towards the base ;quarried for building ....... Feet, 15 25 15 30 90. No. at Waits Quarry, North of Minchinhampton. a Upper ragstone. Not shown in section, similar to that of Rodborough Commona Lower ragstone - . . b Upper freestone .... c Oolite marl - - . d Lower freestone - . _ Beds not seen at base of Inferior Oolite 12? 910 31510 59 The beds marked (e) in the woodcut are UpperLias Sand. From a comparison of these sections it will be observed thatthe forraation ias lost some of its thickness in the distance FULLERS EAUTH. 11 from Rodborougli Common to Walls Quarry. This fact is inharmony with the observed attenuation of the Inferior Oolite,both towards the east and south from Leckhampton Hill, thetypical section of this formation.* The fossils of this formation are so numerous that it is onlynecessary to mention here a few of the more typical. Fossils peom the Ammonites Murchisoniae. Sow. „ concavus. Sow. „ Parkinsoni. Sow. „ falcifer. Sow. „ subradiatus. Sow. Nautilus tr
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectgeology, bookyear1858
