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Published online by Cambridge University Press: 01 May 2009
The pebble-bed of the Lower Greensand of Godalming has been already referred to (‘Geologist,’ vol. vi. pp. 53, 54) as a singular deposit, underlying the Bargate-stone series of that neighbourhood, remarkable alike on account of its peculiar organisms and its (probable) relation to other distant, though somewhat similar, beds; its position in the Greensand is fortunately well-marked, being immediately at the base of Fitton's ‘Upper or Ferruginous division;’ or, following the nomenclature of the Geological Survey, at the base of the ‘Folkestone Beds.’ in composition, it may be roughly described as a mixture of sand and small subangular pebbles, either loosely bedded or variously concreted. Its thickness at Godalming varies considerably, thinning out rapidly to the south of the town, but increasing on the north, in approaching the Hogsback, to a thickness of 8 or 10 feet; occasionally passing into, and alternating with, the lower layers of the Bargate-stone.
page 252 note * A somewhat similar depression may be occasionally seen in specimens of Waldheimia Celtica, and would usually perhaps afford evidence of an internal septum; this species, however, as is proved by easts and single valves in my collection, had no trace of an internal septum.
page 254 note * I regret that I am unable, partly for want of space, to enter into a minute comparison of the varieties of T. oblonga, some of which, as is shown by MrDavidson, (Mon. Cret. Brach., pt. 2, pl. 2. figs. 29–32), and still more by D'Orbigny, M., differ widely from the typical form; yet all, if I mistake not, within such limits as completely to separate them from Terebratella Fittoni described above.Google Scholar
page 255 note * Possibly the commencement of the Wealden axis of elevation; for there it evidence at Godalming, and I imagine also at Folkestone, of slight unconformity between the lower and the upper beds of the Lower Greensand.
