Uppeu 

 Gallery. 



Wall-case 45. 



108 ALTERED COAL MEASURE ROCKS, WARWICKSHIRE, 



51. — Cambrian grit altered. Same locality, passing im- 

 perceptibly into No. 52. 



52. — Quartz porphyry, Llyn Padarn, Llanberis, Caer- 

 narvonshire. Felspathic base with crystals of felspar and 

 granular crystals of transparent quartz. Part of a great 

 intrusive mass of quartz porphyry tuhich cuts through the 

 Cambrian rocks. For a more complete account see IS 



Case 



OS. 



Series of altered carboniferous rocks with associated green* 



stones, Warwickshire Coalfield. Map 63, S. W* 



53. — Coal measure shale, 'partially hardened by heat 

 (baked). Two miles south of Atherstone, Warwickshire. 

 The unaltered shale of the neighbourhood resembles No. 



146, Case 41. 



54. — Quartz rock, Hartshill, Atherstone, Warwickshire. 

 Altered millstone grit, pierced by trap dykes similar to Nos. 

 56 and 57. 



55.— Q 



rock with manganese, near Nuneaton. 



Pierced by 56 and 57, &c. 



56. — Greenstone, Hartshill, Atherstone. Composed of 

 felspar and hornblende, the former predominating. Part of 

 a dyke intruded between the beds of quartz rock. 



57. — Greenstone, very hornblendic. From the eastern 

 line of greenstone, south of Chilvers Coton, near Nuneaton. 

 Intruded among coal measures, shales, and sandstones^ 

 Nos. 58, 60, and 61. 



58. — Sandstone, with iron pyrites. Altered by the prox* 

 imity of Nos. 57 and 59, between which it lies. 



59. — Greenstone, from the western mass south of CMU 



vers Coton, Nuneaton, intruded like 57. 



60. — Altered coal measure shale, Marston Jabet, 



near Bedworth, Warwickshire. 



61. — Greenstone, below No. 62, Marston Jabet, near 

 Bedworth. 



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