33 



"The trial at Crawford's Glen cloth not require much investigation, for as 

 the whole Glen and the adjoining country consists of the primitive rocks, if 

 coal be ever found in that rock, it will be contrary to everything I have ever 

 seen or been informed of." 



On 13th December, the following paper, on "The Geology of 

 Cultra, Co. Down," was read by Mr. Joseph Wright, F.G.S. 



" As one goes from Holywood to Craigavad, by the coast, the first 

 rocks seen on the shore crop out about half way between Holy- 

 wood and Cultra : the beds here are soft red sandstone (Bunter). 

 A little farther on, these are succeeded by red and yellow sand- 

 stones, with beds of marl, considered by Mr. Hull to be Lower 

 Keuper. At about 200 yards from the old pier at Cultra, a fault 

 brings in dark grey fossiliferous shales and calcareous grits 

 (Carboniferous Slate). These are well exposed to the west of the 

 pier. Close under the battery, by Mayfield Cottage, a small 

 exposure of rock may be seen, dark reddish grey limestone, and 

 grey shale, rich in Carboniferous fossils ; a few yards farther, under 

 Rose Cottage, are two bands of yellow dolomite, associated with 

 red marls and thin bedded fostiliferous limestone, laid down on 

 our geological maps as Permian. These beds appear to be of 

 the same age as the small outcrop just spoken of as occurring 

 under Mayfield Cottage, a spot of much interest on account of the 

 many well-marked Carboniferous fossils collected from it ; a trap 

 dyke runs right through the bed, but does not alter the lie of the 

 strata, and though a few of the softer intervening beds between 

 the two stations have been washed away by the action of the tide, 

 yet all the strata exposed dip at about the same angle seaward, 

 and it appears almost certain that both are conformable. 



" At extreme low water mark, outside the dolomite beds, red 

 sandstones occur, differing in no respect from the Bunter Sandstone 

 near Holywood, and which appear to be of the same age. Several 

 fine faults are to be seen at this place ; the most easterly one 

 brings in Carboniferous Slate, similar to what occurs west of the 

 pier at Cultra. These strata extend along the shore as far as the 

 great boulder under Dalchoolin. All the rocks along this shore, 



