162 Dr. BeRger o« /^^ Geological Features 



seen at Maheramesk near Moira, in the valley of the Forth near Bel- 

 fast, in the valley of the Woodburn, near Carrickfergus, and at Castle 

 Chichester in the island of Magee. In all these localities, veins of a 

 delicately white fibrous gypsum occur : salt springs, the usual ac- 

 companiment of similar strata, are found near Carrickfergus, and in 

 other places. 



The sandstone has been sunk into near Lisburn nearly 200 feet 

 without reaching its inferior extremity, and the red marl which 

 overlies it near Belfast is estimated as varying from 40 to 100 feet 

 in thickness. 



The outgoings of the sandstone strata are low, they dip towards 

 the hills on the north west. 



2. Sandstone on the east and north east coast of Antrim. 



The same sandstone which has thus been traced as far as the head 

 of Larne Lough, may thence be pursued in various points on this 

 coast, but since its superior edge is often depressed below the level 

 of the sea, and on the other hand its inferior edge is in one instance 

 elevated far above that level resigning the coast to formations of 

 greater antiquity, it presents in this part of its course an irregular 

 and broken line, of which the description will be the more readily 

 followed if postponed to the explanatory notes on the section of 

 that part of the coast subjoined to this paper. 



3. Sandstone in the east of Derry. 



The variegated marie which covers the sandstone, first makes its 

 appearance, rising from the level of the sea, a little to the west of 

 Downhill near the mouth of the Roe, thence it passes to the south 

 west, bassetting along the base of the bold headland of Macgilligan, 

 and of Benyavenagh the most northerly mountain of the secondary 

 chain in Londonderry. At Kedy hill the next of the groupe, the 

 sandstone, which continues ascending towards the south west, 



