of Tor and Bahhacombe Bays, Devon. 1G3 



posing- upon the limestone and old red sandstone, and attaining considerable 

 elevation between Kin^^'s Kersweli and Cockino-ton. 



At the Corbons, a small cliirat the south extremity of Tor Abbey-sands, is 

 a good section of this rock. It is generally fine-grained, and the cement con- 

 tains crystals of felspar. There is also a coarse variety with many fragments 

 of carboniferous limestone; a fault is here observable in it. 



At the northern extremity of these sands, the red conglomerate suddenly 

 abuts against the carboniferous limestone, its strata becoming vertical*. 



On the south side of the Corbons, the conglomerate is seen close to a fault, 

 resting on red sandstone with green spots :— some of the strata have various 

 tints, and some are greenish. The Livermead-clififs are composed of the same 

 conglomerate and sandstone as the Corbons, containing rounded pieces of 

 quartziferous, red porphyry. 



3. Red Conglomerate of Paington. 



This is connected with the former by a stripe in front of the clilTs between 

 Livermead and Preston, or Paington-sands. Here the Exeter red con- 

 glomerate seems brought into contact with the old red sandstone, probably 

 by a concealed fault, affording the appearance of the former underlying the 

 latter, whereas it only mantles round it. Fortunately, the distinctive cha- 

 racters of these two rocks is very clear in tliis district; and moreover, the red 

 conglomerate contains abundantly portions of the old red sandstone, — a clear 

 proof that the latter was a pre-existing rock. 



The Exeter conglomerate of Paington resembles those previously men- 

 tioned, and is exposed in many good sections. At Rowndham Head, the 

 strata dip north at about 10°. They are often of considerable thickness, 

 contain rounded pieces, varying in size, of carboniferous limestone, old red 

 sandstone, grauwacke, slate, &c. and are interstratified with red sandstone. 



At CoUaton Kirkham the conglomerate rests on old red sandstone. 



•ft' 



Carboniferous Limestone. — Neuere Uebergangs-kalk. Calcaire a Encr'mcs . 



The rocks to which I here give this title, have usually been referred to the 

 transition limestone of English geologists, that is, a limestone whicii occurs 

 beneath the old red sandstone ; they, however, rest upon that rock, contain 

 fossils that have been discovered in the carboniferous limestone of other 

 places, and, though a matter of minor importance, mineralogically resemble 

 it : — they are, moreover, separated from the old red sandstone by a shale, 

 which maybe considered the equivalent of the lower limestone shale. 



* Plate XVIII. fig. 5. 



y2 



