460 INDEX. 



Basalt in the lead mine measures of Northumberland agrees in 



situation with the loadstone of Derbyshire ... 73 



overlying masses of, occur in many parts of the lead mine 



measures ........ 74 — 78 



Basaltic dykes. See Dykes 



Basal ic veins in the granite and schist of Cruachan . . 123 



Beadnel Bay, dyke at, described . . . . . 102 



Belfast Lough, nuts filled with calcareous spar found in . 443 



Bennet, The Hon. Henry Grey, on a whin dyke traversing lime- 

 stone in the county of Northumberland . . . 102 

 Bitumen, found in some varieties of the magnesian limestone 



near Sunderland 6 



Bituminous Limestone, analysis of one, by Dr. Clarke . . 430 

 Blakheath, account of plastic clay beds near . . . 288 



Blende, note on the cleavage of ..... 257 



Bog iron ore, found in the Cheviot hills .... 95 



Boring, estimate of the expence attending at Roxburg or Berwick 10 i 

 Breccia, occurrence of one of a modern date at Loch Ericht, 



having a siliceous cement 266 



Brendan Hills, height of the 437 



Bright, Richard, M.D. on the strata in the neighbourhood of 



Bristol 193 



Bristol, Dr. Bright and Mr. Cumberland, on the strata in the 



neighbourhood of ....... 193 



, sections of the strata near, given by Dr. Bright and 



Mr. Cumberland . ....... 197 



horizontal beds lying on the edges of the inclined strata 



in the neighbourhood of ...... 202 



Buckland, The Rev. W. Description of an insulated group of 

 rocks of slate and greenstone, in Cumberland and West- 

 moreland, on the east side of Appleby, between Melmerby 



and Murton . 105 



, Description of a series of specimens 



from the plastic clay near Reading, Berks: with observa- 

 tions on the formation to which those beds belong . . 277 

 Description of the paramoudra, a sin- 



gular fossil body found in the chalk of the north of Ireland, 

 with some general observations upon flints in chalk, tend- 

 ing to illustrate the history of their formation . . 413 



