Page:Transactions of the Geological Society, 1st series, vol. 4.djvu/471

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INDEX.
461
page
Cader Idris, height of 435
Calamine, found frequently in the limestone near Bristol 200
Campsie, Mr. Mackintosh on the albuminous strata, at 445
Carlisle, plain of, consists principally of red sandstone 105
Carnerlians, account of the manner in which they are procured in Cambay 447
Chalcedony, vegetables in 398
Chalk Flints. See Flints.
Chert, lias changed into, in Sky 176
Cheviot Hills, composed of porphyry 93
─────────, its junction with the lead mine measures not visible 93
─────────, bog iron ore and hematite found in 95
Chlorite, frequent in the trap of Kinnoul 223
──────, crystals of, in quartz 398
Chlorite Schist, with felspar and quartz, rock composed of these substances interlaminated together, passing out of gneiss, at Sleat, in Sky 159
Clarke, Edward Daniel, LL.D. Analysis of one hundred parts of a dark bituminous limestone, from the parish of Whiteford, in Flintshire, North Wales 430
Clay ironstone, formerly collected by the Carron Company on Holy Island 67
─────────── found in the shale of the lead mine measures 67
─────────── sometimes forming septaria ib.
Coak, Mr. Taylor on some appearances in 448
Coal, estimate of the quantity annually raised in the Northumberland coal-field 50
─── found in most parts of the lead mine districts 67
─── quantity of, shipped at Newcastle and Sunderland 99
─── quantity shipped from Hartley and Blyth collieries 100
─── quantity imported into London 100
─── dug near Melmerby and Ousby 118
─── in Sky, appearances of 178
─── altered by contact with basaltic dykes. See Dykes.
Coal measures of Northumberland and Durham described 10
──────────── some of the lower beds of resemble the lead mine measures 11