SERIES OF THE DEVON COAST- SECTION. 157 



with such changes in the physiography of the region as must imply 

 a considerable lapse of time. 



Taking the evidence altogether, there appears to be about as great 

 a break as that insisted on by Mr. Aveline in the Nottingham and 

 Yorkshire area ; not quite so great perhaps as that described by me 

 at the same horizon in Central Germany (Thiiringen, Meerane), but 

 certainly as great as has been recognized by our sub-committee 

 (Permian and Trias) at this stage of the British geological series. 



Here, then, we seem to have recorded a certain definite hrealc in 

 time, and to have reached the loiuest limit of the Trias, as it is exhi- 

 bited in the coast-section ; and if we recognize in the 200 feet of 

 the sandy series next above (including the chief pebble-bed) the 

 equivalent of the Middle Bunter of the Midland and Cheshire Area, 

 it will be seen that the absence here of the whole of the Lower 

 Bunter marks a stratigraphieal as well as a physical hreah in the 

 series. One thing I assert with some degree of confidence, namely, 

 that the rocks of the Devon coast-section, from the base of the 

 Budleigh-Salterton pebble-bed to the base of the Keuper (as it is 

 defined in this paper), are the Devon equivalents (taken as a whole) 

 of the Bunter series, as worked out and demonstrated many years 

 ago by Prof. Hull * in numerous sections. 



The Breccia-Seeies. 



In this are included the " Lower Sandstone" group of Mr. "Ussher; 

 for in these true breccias seem to form a very large proportion of 

 the rocks, and even the interbedded sandstones are often markedly 

 brecciated, as may be seen in the railway-sections between Star 

 Cross and Dawlish. They form apparently the upward extension 

 (with a more sandy facies) of the more uniformly brecciated series 

 which is so splendidly developed in the bold cliff-sections between 

 Dawhsh and Teignmouth. 



The following points seem to me specially worthy of note, by 

 way of contrast between these breccias and the strata which I have 

 recognized above as constituting the Trias of Devon : — 



(1) They are distinctly brecciated (more or less) throughout, 

 with a very crude stratification, and appear to be a series of terres- 

 trial and littoral deposits on the flanks and near the shore-line, 

 probably in land-locked bays, of the Palaeozoic and Archaean moun- 

 tain-region, of which Devon, Cornwall, Brittany, Wales, the Isle of 

 Man, Cumberland, the Scottish Highlands, the Outer Hebrides, the 

 Shetlauds and the Orkneys are but the " worn-down stumps," as I 

 have previously suggested elsewhere t. 



(2) Their high inclination (the dip being, I believe, never less 

 than 10°, though often 20° or more) is a fact to be perhaps explained 

 by their being mainly composed of the detritus of a mountain- 

 system (somewhat as the Eigi Conglomerates are related to the 



* Vide ' Permian and Triassic Eocks of the Midland Counties,' figs. 28, 41 , 

 45, 47, et passim. 



t Quart. Journ. Geol. See. Feb. 1883, p. 79 ; also August 1884, p. 400. 



