Correspondence — JSIr. J. S. Gardner. 377 
and the autlior thinks tkat probably masses of Cambrian rocks were 
forced by disturbances into tbe Cambro-Silurians, and tken the whole 
were metarnorphosed togetker. 
N.E. Wexford. The area commences on the east coast near Cour- 
town Harbour, extends S. to and beyond Wexford, and then S. W. 
to the coast near Bannow Bay. The rocks are generally submeta- 
morphic, with many large protrusions of quartz-rock, generally 
changed by metapepsis into quartzite. Booney’s Bocks, S. of Poul- 
shore, consist of two protrusions of quartz-rock, between and N. of 
which are green and purplish Cambrian shales, in which Oldhamia 
antiqua has been found, as also in a green bed further south at 
Cahore. On the coast of Haggard and Bannow the Cambrian and 
Cambro-Silurian rocks are mixed up very irregularly bj 7 means of 
numerous faults. At Bannow Oklhamia is not uncommon. The 
most contiuuous sections are seen in this area in the valley of the 
river Slaney, where the rocks generally dip to the N. at angles of 
10°-60° or 80°, and are going from N. to S. : — 
1. Massive grits with some shalv beds, underlain by more or less altered Feet 
grits and shales ; average dip 30 J , giving a thickness of about 3000 
2. Schists with quartzites (metarnorphosed grits), dip 50°; about 4000 
3. Schists with masses of quartzite (altered quartz rock), dip 40°; about 4000 
Total about 11,000 
but the numerous faults under the numbers uncertain. 
S.E. Wexford. The rocks are more or less metarnorphosed, gra- 
duating from schist through gneiss into granite near Carnsore. 
COBRESPOITDEITCE. 
THE RED CLAY OF THE DEEP-SEA AND THE GAULT DEPOSITS. 
Sie, — In the May number of the Monthly Microscopical Journal, 
a portion of the address to the Boyal Society in November last has 
been printed, in which the President mentioned the endeavour of 
Dir. Sorby, to determine the nature of the Bed Clays of the ocean- 
bottom, and stated that Mr. Sorby had informed him that many 
specimens of the Bed Clay are so entirely analogotis to what the 
Gault must originally have been, that those speeimens might almost 
be looked upon as being as truly modern Gault as the Globigerina- 
ooze is modern Chalk. This opinion it appears is derived from the 
similarity of the Gault deposits to those of the Bed Clays of the 
ocean-bottom ; but this passage of the address as reported is 
somewhat obscure. We can hardly, however, suppose that it is 
intended to convey that the Gault was deposited under conditions at 
all similar to those in which the Bed Clay is now being deposited, 
as the former, especially as shown in its earlier beds, was a littoral 
and shallow-water deposit. This is abundantly shown by the 
common occurrence of wood, twigs, and eones of Sequoia and Pinus, 
by turtles’ eggs, and by its mollusca, many of whieh belong to genera 
now confined to shallow water. The Gault in all parts of Europe 
has been proved to have been deposited in a sinking area, its fossil 
