450 Ho> •ace B. Woodward — Notes on thc Devonian Bocks. 
little to the west of north. We may trace the slates above tliem at 
Cockington village, and if we proceed up the valley by Stanton, we 
come upon the limestone dipping at from 20° to 24° a little to the 
west of north. At the bottom of the valley immediately to the east 
of Barton, tliin flaggy red sandstones may likewise be traced beneath 
the slates. 
In 1875 a well-section was made by the Diamond Eock Boring 
Company’s process for the Torquay Brewing and Trading Company 
in Fleet Street, Torquay. The following details were kindly com- 
municated to me by Mr. T. Perry, B.A., and although the boring 
was not carried sufficiently deep to supply all the requirements of 
the geologist, the facts are nevertheless of sufficient interest to be 
noted. They are as follows : — 
Petitor Marble about 92 feet 
Plain Limestone ,, 247 ,, 8 inches. 
(Hiatus of two or tbree feet filled with soft 
teuacious red clay.) 
Blue Slate „ 82 „ 9 „ 
Cbocolate Slate ,, 65 „ 7 ,, 
Blue Slate ,, 98 „ 0 ,, 
Indurated Red Marl „ 42 „ 7 ,, 
Depth of boring 628 ft. 7 in. 
The inclination (or “ natural cleavage ” as it was termed) of the 
limestones was about 70°, whereas the inclination of the slates was 
no more than 45° ; and this difference I am inclined to tliink is due 
to a fault between the two wliich runs north- west and south-east 
along the margin of the limestone that extQnds from Torquay 
Harbour to Daddy Hole. 
Owing to tliis inclination, the thickness of the beds passed through 
may be estimated as follows : — 
Limestone 130 feet 
Slates 185 „ 
Red Marl 25 „ 
Concerning the so-called “ Indurated Bed Marl,” I saw a specimen 
which seemed to belong to oue of the junction beds between the 
slates and red sandstones, but it would be hazardous to express any 
more definite opinion about it. 
The succession of limestones, slates, and red sandstones here 
pointed out is not new : the results of my own field-work rather 
coincide witli the views expressed fifty years ago by De la Beche. 
Nevertheless, a different interpretation was put upon the structure 
of South Devon by Dr. Holl ; and De la Beche himself was led in 
after years to modify bis opinions concerning the Classification of the 
beds, so as to conform witli the views of Sedgwick and Murchison. 
It was in 1827 that he gave an account of the geology of Tor and 
Babbacombe Bays. The limestones he then termed Carboniferous 
Limestone, stating that the beds “ contain fossils that have been dis- 
covered in the Carboniferous Limestone of other places, and, though 
a matter of minor importance, mineralogically resemble it; they are, 
moreover, separated from the Old Bed Sandstone by a shale, which 
may be considered the equivalent of the Lower Limestone Shale.” 1 
1 Trans. Geol. Soc. 2nd ser. vol. iii. p. 163. 
