Manchester, 8., and L. Raihvay Extension. 103 



limestone resembling Chalk, and here and there it is by no means 

 easy to mark any plane of junction between the Chalky Boulder-clay 

 and the weathered rubble of Great Oolite. At one point there were 

 streaks or strips of reddish-brown clay at the base of the grey 

 Boulder-clay, and more or less parallel to the bedding of the rubbly 

 Oolite below. A little further south the Great Oolite was disturbed 

 and nipped up. Again further south, the Boulder-clay was seen 

 resting on a piped surface of the Great Oolite, the pipes being filled 

 with greenish clay, and with reddish-brown clay precisely like that 

 incorporated in thin strips at the base of the Boulder-clay. 

 (See Fig. 2.) 



- " ' ? ■ 



Fig. 2.— Sections East of Hill Farm, Eadstone, Northamptonshire. 



Chalky Boulder-clay resting on Great Oolite. 



(a) Great Oolite with piped surface, (b) Great Oolite disturhed. (c) Strips of brown 

 weathered clay at base of Boulder-clay. 



Here evidently the agent which accumulated the Boulder-clay 

 was forced over an old weathered land-sui-face of the Great Oolite. 

 That formation was disturbed in places, and portions of the old soil 

 were stripped off and included, with masses of the rubbly rock, in 

 the Drift. In other places the Boulder-clay was accumulated evenly 

 on the Oolite, the rubbly surface of which was planed off without 

 j)roducing any marked disturbance in the strata beneath. 



At the southern end of this cutting, we pass sections of Boulder-clay 

 with Oxfordian Gryph^as resting on Great Oolite marls, limestones, 

 and 0«irea-clays, and then com© upon a section of coarse Boulder- 

 gravel and fine sand, exposed to a depth of 12 or 15 feet. The 

 cutting had been partially sloped, and the connection was not very 

 clearly shown between the Boulder-clay and the Gravel ; but it was 

 evident that the Boulder-clay abutted against a Gravel mound, the 

 entire cutting (above the Great Oolite) to the north being in 

 Boulder-clay, and to the south being Gravel. It was, moreover, 

 possible to trace a thin course of Gravel underlying the Boulder- 

 clay. The Gravel was rudely bedded, and consisted of Clialk, 

 Oolite, flint, quartzite, and Carboniferous Limestone. Belemnites 

 , and the Oxfordian Gi^ypJicea dilatata were noteworthy among the 

 \ derived fossils. Blocks of rock up to a foot in diameter were 

 I present. In fact, the assortment of stones in the Gravel was such 



