90 GEOLOGY OF THE LOTHIANS. 



bed of the Tyne, is more or less horizontal, an arrangement 

 of the strata, which, but for junctional phenomena visible 

 at other points in this district, might lead us to imagine that 

 they had not been acted on by ignigenous masses. 



To trace the junctions of the two classes of rocks through 

 that part of the country which extends from Haddington 

 to the shores of the Firth of Forth, is, from the obstacles 

 which so often mar the progress of the geologist, impossible. 

 On examining, however, the shore which stretches from 

 Morrison's Haven to Dunbar, numerous rock sections of 

 the most interesting nature may be observed. The strata 

 are traversed by intruding masses of trap, and these, it is 

 highly probable, are connected (though the encumbered 

 state of the surface prevents such connections from being 

 seen,) with that great East Lothian district of trap, the 

 boundaries of which we have just defined. On examining 

 the northern shore of East Lothian, the first mass of trap 

 which is observed occurs at Morrison's Haven ; it is a green- 

 stone of the usual description, and rises directly through the 

 sandstone, which on one side rests upon it, and on the other 

 sinks below it ; no junctions are, however, to be found. On 

 proceeding along the coast in the direction of Cockenzie, 

 the various strata of sandstone and slate evince much dis- 

 turbance, and preserve no general line of bearing, but, on 

 the contrary, dip at varying angles to various points of the 

 compass. At the harbour of Cockenzie a great mass of 

 large granular greenstone occurs ; it rises directly through 

 the strata which, on one side, dip to the E. S.E. at 30°, and 

 on the other to the S. Between this and the greenstone 

 which forms Goolan Point, other greenstones are found as- 

 sociated with the coal sandstones and slates ; one of these at 

 Bogle Hill is rudely columnar, and throughout its whole 

 visible extent runs parallel with the strata, which, when in 



