264 



In the " Dublin G-eological Journal,'-' vol v., p. 234, Mr. Doyle writes 

 as follows : — " At Lame, as I have been informed by P. M'Grarrell, Esq., 

 of the Magheraniorne linieworks, borings were made in search of coal in 

 1839, in the townland of Ballyedniond, near the village of Glynn. The 

 salt reached was eight yards thick ; but as the borings were discon- 

 tinued at the depth of 174 feet, it is probable the thick deposit lies 

 farther down. Between this point and the mine at Duncrue, at the 

 village of Eden, there is a salt spring, which would lead to the supposi- 

 tion that the whole district between Larne and Carrickfergus contains 

 a saLiferous deposit/' 



Since these notes were first written, a new salt mine has been dis- 

 covered at Eed Hall, two miles north of Carrickfergus. The details of 

 the borings in this mine, as he got them from the engineer in charge of 

 the mine, are as follows : — Harek 9, 1853. 



ft. ft. 



1. Gypseous marl, . . . . . . 550-0 



2. "Workable saliferous beds, . . . 100-0 



3. A stratum of red salt, . • . . 22-5 



4. A saliferous layer, . • . . 26*0 



5. Pure salt, . . • . . 84-0 



6. ITixed rock salt, ..... 14-5 



7. Pure salt, . . . . . . 39-0 



8. Thin blue band, 6-6 



9. Dark-coloured rock, resembling ironstone, 4'0 



10. Freestone, ... . . . 10-1 



11. Grav rock, not vet through. . . . 2-4 



286-0 



23-1 



859-1 



The last four items look as if thev had sot into the coal-measures. 



Lias. 



The Lias is one of those rocks of Antrim that appears in fewer 

 places than any other, and even where it does appear I do not know 

 even one good section by which its thickness can be determined. 



It appears to be pretty well developed at Larne ; there it occupies 

 the coast, most part of the way from the old saltworks, to "Waterloo 

 House, where it is covered by greensand and chalk. Bank Head at 

 this place is 95 feet high, and there is a section of lias shales and sand- 

 stones at the shore here, showing a dip of 25° north-west. From the 

 best estimate I could make, I consider the whole rock is as thick again, 

 and half as thick, as the perpendicular height of Bank Head, making 

 about 240 feet. 



There appears to be a fault at the entrance to Larne Lough. The 

 lias at the north-west side of the ferry is elevated above sea level ; on 



