GEOLOGY OF FOLKESTONE — THE GAULT. 



87 



also identify him personally by slio\Ying his relations to the head of 

 his house, his connections and alliances." 



So with the geologist: when petrological conditions, chemical 

 analysis, or microscopic investigation fail at first to give the clue, we 

 may still find the key to the solution of a physical fact in the evi- 

 dence of some simple, even it may be some obscure thing. But the 

 key to the geological history of this valuable band of mineral manure 

 has not yet been found. There, however, is that naiTow seam of 



Lign. 11.— Copt Point, from the East Pier of Folkestone Harbour. 



A, Gault. d, Stratum of phosphatic casts of Ammonites Benetianus. B, "Junction-bed,'* 

 composed of nodules of phosphate of lime, with casts of Ammonites mammilaris and gnarled 

 pieces of wood, bored by Toredo. C, Lower greensand. e, Sti-atum of small phosphatic 

 casts of Ammonites mammilaris, bivalves, and Dentaha. 



rounded nodules, ofiering 40 per cent, of fertilizing phosphate, per- 

 sistent everywhere with the gault itself All round the chalk-downs, 

 in their range from close by this point on which now we stand, 

 through garden-like Kent, and past the charming rustic hamlets of 

 beautiful Surrey to the bleak Sussex coast have I, walking through 

 green refreshing lanes and over stubbled fields, traced out this fer- 

 tilizing band. On the northern shores of France, between where the 

 now forsaken but once active port of Ambleteuse presents its pierced 

 and mouldering piles, and Wissant, the gault again comes out to 

 view, and this narrow sombre-coloured junction-seam again is there. 



