Publications
A new fossiliferous deposit in West Sussex, by J. C. Ferguson, published June 1923 in Geological Magazine (vol. 60, issue 6, article, p.267) View Online
Abstract:At the southern end of Thorney Island, about three miles S.S.W. of Emsworth, in West Sussex, there are low cliffs of London Clay covered by Pleistocene deposits. The London Clay has been folded near the top, and its surface presents a series of basin-like depressions, 3 to 10 feet in diameter, and evidently caused by downward pressure. These basins are occupied by Pleistocene gravel, which contains numerous erratics-many of igneous rocks-and resembles the better-known Erratic Gravel of Selsey. The Erratic Gravel is covered by Coombe Rock and Brickearth, which form the top of the cliff, as shown in the diagram.
The Geology of the country around Horsham, Sussex, by J. C. Ferguson, B.Sc., published 1926 in The Proceedings of the Geologists' Association London (no. 37 issue 4, article, pp.401-413) View Online
Abstract:The following are the chief results of this investigation of the Horsham district
- The existence of small outcrops of Grinstead Clay has been shown in the southern part of St. Leonard's Forest.
- The Upper Tunbridge Wells Sand has an unusually large thickness, viz., about 180 feet, compared, for instance, with its thickness at Tunbridge Wells (80 ft.).
- The Horsham Stone - using the term in its broad sense so as to include the intercalated beds of clay, is a lenticular deposit, and does not keep to definite horizon.
- There are three distinct lithological types of Horsham Stone: a flaggy calcareous sandstone, a fissile stone and a thickly bedded stone.
- The Horsham Stone bears a strong similarity to the Tilgate Stone (Wadhurst Clay) in its microscopic structure.
- The absence of limestone bands in the Weald Clay below the Horsham Stone is noted.
- Attention is drawn to several interesting features concerning the rivers of the district.