1 893-94.1 119 



IV. BALLYORAN QUARRY. 



Parish of Dundonald, Co. Down, 200 feet above sea level. 

 Situated among low rolling hills, about a mile-and-a-half from 

 Dundonald station. Disused quarry of red Trias sandstone, 

 overlaid by boulder clay. Section running N.E. by S.W., 210 

 yards long. Height, 51 feet in centre, of which 34 are boulder 

 clay. Section photographed shows 20 feet of clay ; at N.E., 

 clay thins to 10 feet. Sandstone stratified ; dips to the N.N.E. 

 at an angle of n°. The ice appears to have travelled in the 

 same direction, planing off the upturned edges of the strata, 

 fragments of which are abundant in the base of the drift, which 

 is unstratified red sandy clay. Boulders principally sub-angular, 

 many being well smoothed and striated. No shells found, and 

 only one species of Foraminifera. Photographs of the section 

 were obtained. 90 boulders taken were all erratics. Somewhat 

 to the S.W. is an Esker. 



Erratics. — Quartzites (?) Porphyritic rocks (?) Silurian grits 

 and slates, Co. Down. Chalks and Flints, Co. Antrim, N. 

 Basalt, Co. Antrim, N. Eurite with Riebeckite, Ailsa Craig, 

 N.E. 



V. — CARROWREAGH QUARRY. 



A second unused quarry, lying to the N., was visited; boulder 

 clay resting upon Trias sandstone dipping to N.N.E. at an 

 angle of 22 . The clay rests upon the upturned edges of the 

 strata and upon the surface of the uppermost layer. The 

 ground falls away from the quarry to E. and N.N.E. Main 

 section 32 yards long by 30 feet, resting on 6 feet of Trias. A 

 section at right angles, 20 yards long by 36 feet, showed the 

 clay dipping rapidly to S.E. at an angle of 30 . Surface of clay 

 very irregular, overlaid by an irregularly deposited mass of 

 homogeneous fragments of pale, coarse, angular, friable sand- 

 stone, intruding in places slightly into the clay. This deposit 

 had in parts layers of finely stratified sand intruding in curved 

 bedding into the clay, which was altered at the top of the bed 

 by a mixture of this paler deposit. A similar deposit is found 



