374 



ON SOME SUPERFICIAL DEPOSITS IN OUTOH. 



By the Revd. J. F. Blake, M.A., F.G.S. 



Part II. 



(With a Plate.) 



(Continued Jrojn page 18^ of this Volume.) 



THE ASSOCIATED BOULDER BEDS. 



These are not mentioned by Mr, Wynne, unless he refers to them in the 

 passage quoted above when he writes of the concrete that it is " sometimes 

 conglomeratic" {ojh cit p, 81). As no asolian deposit can be in itself conglo- 

 meratic, these boulder-beds require explanation. 



I will first describe the three localities where I have observed these beds. 

 The first is in the banks of a river running out from the Habo Hills at 

 Fulae near Kotae, where the subrecent concrete has been above recorded. 

 Here we find the following section (see fig. 1) : — 



Fig. I. — Section on stream loest of Kotae. 

 A— Oxfordian, 1 C — False-bedded concrete, 



B— Boulder-bed, ! D— Smaller boulder-bed. 



The bed of the river and about 4 to feet of the vertical sides are 

 composed of Oxfordian shales dipping at a very high angle. Their surface, 

 except for the river-erosion, is nearly flat, and immediately on the top lies a 

 5-foot bed of rounded and subangular stones, from the size of a quarto book 

 downwards, embedded in a fine loamy material without any stratification. 

 The boulders lie irregularly jumbled together, with a tendency however for 

 the long axes to lie horizontally, so that the deposit has very much the aspect 

 of a boulder-clay. Over this comes 7 to 8 feet of false-bedded concrete, and 

 then follows another boulder-bed 5 to 12 feet thick up to the top of the clifi', 

 in which the boulders are smaller, about the usual size of coals in a scuttle. 

 All the boulders, so far as observed, can be matched in the neighbouring hills. 

 The stratification is approximately horizontal ; but the boulders only 

 commence some way down stream, away from the outer slopes of the hills 

 and below the spot where the Miliola-heaving concrete is seen resting direct- 

 ly on the Jurassic rocks. 



The second locality is on the south side of the Jhurio Hills, in the con- 

 crete-filled gorge and beyond. The description of these deposits would be 

 practically a repetition of the last— only the thicknesses are somewhat 

 greater, and the bed-rock is not reached in the stream-lottom, where the 

 boulders are seen in the aides. 



