Vol. 55.] AGGLOMERATES ASD TUFFS OF CONGLETON EDGE. 551 



calcareous shales are exposed on the same strike with the 

 agglomerate. This suggests a neck, the gap representing the actual 

 site of the vent. No further evidence is obtainable at the surface, 

 and unfortunately the underground workings cease 58 yards before 

 the critical point is reached. There are some slight appearances at 

 the surface of a fault, but no absolute proof. The limestones and 

 shales can be followed for the next 150 feet, then all exposures are 

 lost beneath a slipped mass of stiff chocolate- coloured Boulder Clay. 

 The dip is seen to be changing from east to south-east. South-west 

 of the slipped mass of clay the thin limestones and shales are exposed, 

 and above them lies a thin band of calcareous tuff, overlain by 10 

 feet of agglomerate with encrinites. This agglomerate is much 

 decomposed and of a deep ochreous colour, but the evidence is not 

 sufficient to settle whether this is the same band as that seen in the 

 north-eastern corner of the quarry. Above the band of agglomerate 

 lies a hard dark shale, and 15 feet above this a coal 1 foot 6 inches 

 thick is seen, the intervening beds being hidden beneath rubbish. 



The dip is here nearly due south. The agglomerate ends off 

 against a small fault with a northerly downthrow, but thin limestones 

 and shales are again seen in the extreme south of the quarry. 



(h) "Brook-section 250 yards north of the Quarry. — No 

 signs of igneous rocks are met with south of the quarry, the dip bring- 

 ing in higher beds, but about 250 yards north of it a small stream 

 shows the following apparent descending sequence : — 



[The letters and numbers refer to specimens examined by 



Mr. H. H. Arnold-Bemrose : see pp. 557-558.] pgg^. jjjg^ 



N 1060. Tufaceous limestone 4 



Gap, a few feet. 



Small coal 5 



Hard calcareous nodular rock 3 



Gap 2 6 



F 1065. Flaggy calcareous sandstones, passing into shale 5 



Productus- and encrinite-limestone 1 2 



Black shales, with nodular concretionary limestone ... 3 



Y EQcrinite-limestoue 1 3 



1068. Tufaceous limestone 8 



X 1061. Tufaceous limestone 1 9 



M 1062. Tuff, much decomposed ; no fossils. 



Exposure obscured towards bottom 120 



Gap 130 



O 1063. Coarse tuff, with fragments of limestone 100 



C 1011. Tufaceous limestone, with fossils 2 



V 1056. Well-bedded calcareous tuff 6 



E Massive limestone 3 



Hard tuff 8 



T 1057. Tufaceous limestone 8 



A 1009. Well-bedded calcareous tuff - 1 11 



R 1058. Thin hard tufaceous limestone 2 



D 1012. Tuff 1 



Hard limestone 3 



Gap 12 



B 1010. Tufaceous limestone 2 



P 1059. Tuff, coarsely laminated 5 



Limestone passing into calcareous tuff 2 6 



Yellowish-brown tuff 64- 



