246 



GREENSTONE : TOADSTONE. 



Upper 



GrAXLEEY. 



Wall-cases 

 6 and 7. 



is scat- 



183— Greenstone, of a somewhat hypersthenic cha- 

 racter. It pierces the soil in different places, and 

 tered.over the country in large blocks. This rock forms 

 part of a mass of trappean rock extending north and south 

 and is apparently somewhat altered from exposure to the 

 influence of the neighbouring granite. It makes an ex- 

 cellent material for roads.— Michaelstow Beacon, Corn- 



wall. 



184.— Compact greenstone (weathering brown) in 

 close contact with slate — Carn Llidi, St. David's, Pem- 

 brokeshire. 



185. — Fine-grained greenstone (weathe 



brown), 



a little removed from contact with slates.— South-east side 

 of Carn Llidi, St. David's, Pembrokeshire. 



186. — Basaltic greenstone. 



Hill 



87 



Salop. ' 



Compact greenstone.— Gurnard's Head 



Zennor, Cornwall. ' 



188 — Greenstone {locally termed " toadstone"), com- 

 posed of an intimate mixture of felspar and , 

 From a mine near Hartshill Hall, Derbyshire. 



189.— Compact greenstone, composed of an intimate 



mixture of felspar and hornblende, in nearlv eonal nrnnn*. 

 tions. 



Lanarkshire, Scotland. 



Weathers ferruginous brown — North of Strathaven, 



190. 

 f felspa 



( 



field , Buxton, Derbyshire. 



o 



•Near Fair- 



191. 



( 



vein 



of aragonite — Allport, Bakewell, Derbyshire. 



192.— Greenstone, from a dyke cutting through Cam- 

 brian rocks — Longmynd, Shropshire. 



193.— Compact greenstone, associated with slates and 

 grits. (See "Report on Cornwall," p. 82 

 St. Austell, Cornwall. 



194.— Compact greenstone.— Between Lay Point and 

 St. Ives, Cornwall. 



) — Black Head, 



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