Vol. 58.| THE CARBONIFEROUS, ETC, OF THE ISLE OF MAN. 647 
34. The Carsonirerots, Permian, and Triassic Rocks wider the 
Gracrat Drirr in the Norru of the Iste of Man. By WitLiam 
Borp Dawrxins, M.A., D.Sc., F.R.S., Professor of Geology in 
Owens College (Victoria University), Manchester. (Read 
May 28th, 1902.) 
| Map on p. 656. | 
ConTENTS. 
Page 
Pe introduc boty: ees cae cea ee eenceeniss nese eteh oso: 647 
ie Borie Nor aniliben: Moaterentetecrcns-cscseene.c, 647 
Ul. Boring No. 2, at Ballawhane ....... sen eeeane AeAepper 648 
IV. Boring No. 3, at Knock-e-Dooney ..................... 649 
VS Borine No.4, ai Mallaghenmeye eareeensecest.e~ +r een 651 
Wale Bormie No- Svat ommtroty Ayer mene. se) tee. sles: 652 
WE Borme Now6, ab Pomtvor Ayer ies..c: +. 2-2-5... 0502 653 
ME Rho Manx Salttield’ 2i.c cscsscscteaseeers oe ove es secsas eos 659 
Wee General Conclusions 2.2. ee ties nase e sce 658 © 
I. InrropuctTory. 
Tue whole of the Isle of Man, north of a line drawn due west from 
Ramsey, is covered with a thick mantle of Glacial Drift, forming a 
plateau rising, in some places, to a height of more than 100 feet 
above the sea. South of this, obviously a shore-line, the iceworn 
Ordovician massif of the island rises in a series of precipitous hills, 
culminating in Snaefell. The contrast, between the northern plain 
and the southern hills, is so marked, that it raises the question as 
to whether the Ordovician rocks are continued in the shape of a 
seaworn plateau, covered by Drift; or whether, in this concealed 
area, other and newer rocks occur, similar to those surrounding the 
Ordovician massif of the Lake District, of Carboniferous, Permian, 
and Triassic age. It was not improbable that the Coal-Measures of 
Whitehaven might extend beneath the sea in this direction. The 
question has been solved by a series of six borings, carried on under 
my advice from 1891 to 1898 by Messrs. Craine, and under the 
able direction of Mr. John Todd, to whom I am indebted for the 
journals from which the sections have been prepared. Of the spe- 
cimens, from which the strata have been identified, some are in the 
Manchester Museum, Owens College, some in the Museum of Practical 
Geology, Jermyn Street, London, and some in the possession of the 
engineer at Ramsey. The borings are all close to the coast-line, 
starting from a plateau of sand and gravel, at about 20 feet above 
Ordnance-datum. They have proved that the Carboniferous Lime- 
stone, the Yoredale rocks, and the Permian and Triassic Series, lie 
buried under the Drift in the northern plain. 
II. Bortne No. 1, at Loen Moar. 
The westernmost of the series is at Lhen Moar, about 270 yards 
north of ‘The Park’ on Sheet No. II of the 6-inch Ordnance-map 
of the Isle of Man. (See also fig. 1, p. 656.) 
