Publisher's Synopsis
Excerpt from A Short Chronicle Concerning the Parish of Croydon in the County of Surrey
Of the Tertiary series, the first are the Thanet sands, so called from the Isle of Thanet, where they attain their greatest thickness. These have but a limited extent near Croydon they are seen, however. In the railway cutting near Combe Lane, and in the large pit beyond, at Duppa's Hill, and at Croham Hurst. As the fossils found in them indicate, these sands are also of marine origin. To these sea-beds succeed the Woolwich and Reading series, partly of ?uviatile, estuarine and marine origin, showing a further change in the physical conditions Of the district - evidence of land-surfaces down which rivers ?owed, teeming. With molluscous life, which have left traces of shell-beds at Park Hill, Duppa's Hill, East Croydon Station, and the Croydon Sewage and Gas Works, Waddon.* The Woolwich beds in question indicate sub-tropical conditions. Other geological revolutions following, this area became covered with a newer deposit of sand and pebbles, referred to the Oldhaven beds, those rounded pebbles so largely exposed on Addington and Duppa's Hill, and at Croham Hurst; the same being evidently due to some Old coast line of chalk, from the ?ints of which they were derived, worn and rounded by a long-continued sea-wave attrition. Croham Hurst and Addington Hills, indeed, appear to have once formed small shingle-beached islands, peeping out from the ocean, a condition in which they seem to have remained for ages.
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