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SANDSTONES AND SANDS. 



49 



93.— Thin-bedded, micaceous, concretionary sandstone 

 (" Tilestone"). 



Hi 



94.— Shelly micaceous sandstone, Loiver Silurian, with 

 numerous casts of Orthis calligramma. — Anglesea. 



95 New red sandstone, from the Keuper Sandstone, 



in the middle of the marl.— Newnham, Gloucestershire. 



(Keuper). From the same 



Upper 

 Gallery. 



Wall-case 41. 



96. — New red sandstone (Ke 

 beds as the above. — Dimock, Worcesh 

 None of the sandstones from 49 to ! 



pathic-4 



if any of them are so, the lime is in very small quantity. 

 M, FA Nos. 61, 66, and 94 are shelly, but the lime of the shells 



solution, their casts alone 



having been washed away in 



remain. This is frequently the case in parts of strata near 

 r ewBedS» the surface of the ground ; while deeper, the lime of the 

 wcesterskiii shells still remains. In the specimens that follow, from 98 



to 109, the lime of the shells is preserved. — A. C. R. 



97. 



Sandstone, (white b( 

 New Red Sandstone.) 



crystals of calcareous spar. — Ashby -de-la- Zouch, Leicester- 

 shire. 



98. — Sandstone with fossil shells. Silurian. — Church 



Stretton, Salop. 



99. — Kelloway rock, calcareous sandstone, occurring at 

 the base of the Oxford clay in certain districts. It derives 

 its name from Kelloway bridge, in Wiltshire, where it was 

 observed by Dr. Smith. It is chiefly remarkable for the 

 beauty and abundance of its peculiar fossils, and is seldom 

 used for a building stone. — Ray Bridge, near Melksham, 



Wilts. 

 100. — Old red sandstone ("tilestone") containing 



Trochus helicites and Cucullcea antiqua. — Bicliton, south- 

 tvest of Bishops Castle, Salop. 



101. — Lower green-sand, containing numerous fossils 



( Terebratula sella). — Atherfield, Isle of Wight. 



102. — Lower green, sand, with oysters and other fossil 

 shells. — Sandgate, Kent. 



103.— Arenaceous shale, Upper Ludlow (slightly cal- 



