To face .p 512.] Quait. Joum. GeoL Soc. Vol. LXVIII. PL XLY. 



Fig. 1. — Troivharroiu Quarry, Silverdale, shoiving vertical beds of D^. 



E. J. G. photo. 



Fig. 2. — Middleharroiv Quarry, Silverdale, shoiuing thrust-plane in D^, 



E. J. G-. photo. 



