32 A NEW FLORA OP 



The Boulmer Dilce is 100 feet wide, ranging north 80° east, 

 and appears only on the coast passing perpendicularly through 

 Mountain Limestone strata, which it has altered but slightly. 



Troles Dihe is seen in the eastern part of the Shilbottle col- 

 liery, running in the direction of south 85° west, having a width 

 of 33 feet, and metamorphosing the strata on both sides. 



The Hampeth Dike is large, and passes through the Shilbottle 

 coal field. A mile and a half south-west of Shilbottle it appears 

 in the bed and banks of Hampeth Burn, which has forced a pass 

 through this rocky barrier by a narrow gorge, the basaltic cliffs 

 on both sides reaching the height of 50 feet. The width of the 

 dike here is 150 feet, and the direction S. 80° W. : near to it the 

 coal is charred. It seems to extend to the sea, passing through 

 Millstone Grit beds a little southwaixl of Berling Carr. 



The AcUington Dike has a general direction of west by north, 

 and appears on the coast at Bondicar ; passing through the Coal 

 Measures and Millstone Grit, it crosses the Coquet near to Ack- 

 lington Park, where it is 30 feet wide. A dike in the line of 

 this is seen cutting through the Mountain Limestone, at Deb- 

 den colliery, and ranging onward as far as Clennell approaching 

 near to the porphyry of the Cheviot, hut never entering it. At 

 Cartington Castle a limestone abuts against it on the north side. 

 The range is thus about 20 miles. 



The Causey Park Dike is 30 feet wide, and has a direction from 

 east to west, cutting through Millstone Grit strata. Gritty sand- 

 stone abuts against the north cheek, and flaggy sandstone and 

 carbonaceous shale are on the south side. 



Two dikes, about a mile and a half apart, run parallel from 

 Hartley to a mile northward of Cramlington, in the direction 

 of west north-west, and pass through Coal Measure strata. In 

 a line with the Southern Hartley Dike is one at Bolam cutting 

 through Mountain Limestone beds, which are metamorphosed. 



The Tynemouth Dike appears in the cliff below the Priory, 

 rising through the Coal Measures, the red sandstone, and the 



