J. W. JUDD ON THE SECONDARY ROCKS OP SCOTLAND. 699 



thickness, destroys the continuity of the section. It alters in a very 

 marked manner both the beds above and those below it. 



ft. in. 



(4) Alternating beds of shale and calcareous grit with, few fossils, 



except casts of univalves „ 14 



(5) Bed of grey compact limestone with partings of clay. Fossils 



are by no means rare in this bed, but are very imperfectly 

 preserved. Among them occur spines of Acrosalenia, shells of 

 Ostrea irregularis, Lima Her , manni{?), Phasianella (?) sp.,i?Ayw- 

 chonella sp., and Thecosmilia Martini 6 



(6) Shales and sandy beds imperfectly seen, passing downwards into 



hard calcareous grits with carbonaceous markings, which alter- 

 nate with dark blue shales. These beds contain only few and 

 very imperfectly preserved fossils 20 



(7) Beds of hard argillaceous limestones, compact or occasionally 



oolitic, sometimes becoming sandy in character ; these alternate 

 with dark blue shales containing nodular bands of hydraulic 

 limestone of a whitish colour. The limestones are occasionally 

 crowded with univalves and corals, and sometimes almost 

 made up of shells of Ostrea irregularis. Other fossils are com- 

 mon, but very difficult of extraction. 



(8) Below the last beds of limestone are found traces of another 



series of estuarine strata (exposed near the old mill of Apple- 

 cross), which consists of soft yellow sandstones, grits, and con- 

 glomerates, in the lower part of which a coal-seam of some 



thickness was once exposed ? 



The base of this series is not seen. 



Unfortunately this interesting section of the Infralias strata in 

 Applecross is very imperfect ; for while, as we have seen, its base is 

 nowhere exposed, it is equally impossible to trace the relation of the 

 thick series of strata to the Lima- or BucMandi-he&s, which make 

 their appearance at another point in the Applecross district. 



Besides the sections in the burns at Applecross, there are some 

 other exposures of the Infralias in the district which are of con- 

 siderable interest. Thus in a stone-pit behind Applecross House a 

 series of beds of limestone of a blue colour, but weathering white 

 and of beautifully oolitic structure, is seen to the depth of about 

 15 feet. Each floor of limestone is about 1 ft. thick ; and they are 

 not separated from one another by partings of shale. The usual 

 fossils are found here, Ostrea (Terquemia) arielis, Quenst. sp., being 

 especially abundant and characteristic. The same beds are found 

 dipping seawards at the village, at an angle of from 10° to 12°, 

 and are here traversed by an intrusive sheet of dolerite. These 

 limestones abound with specimens of corals, gasteropods, and oysters. 



Between the village and Applecross House masses of sandstone 

 not in situ are found, which contain coaly seams and many 

 obscure plant-remains, some of the latter being in a vertical position 

 with respect to the beds. 



From the space occupied by the Infralias beds in the great Cliff- 

 section of Eaasay (see fig. 2, page 671) it is clear that the strata 

 of this age must have a thickness of from 150 to 200 feet ; but the 

 details of their succession can nowhere be distinctly followed. It is 

 evident, however, from an examination of the beds irregularly ex- 

 posed in the midst of the masses of talus which overwhelm and 



