66 Mr. Hutton's Notes on the New Red Sandstone, <Spc. 



edge of the Magnesian Limestone formation ; the yellow Sand appears, 

 exhibiting all its usual characters, on the northern face of the hill, about 

 half-way down. 



Clack's Heugh presents a very bold cliff of Limestone, resting upon 

 the yellow Sand, here forming a bed of immense thickness ; the Coal 

 Measures are made to abut against the Limestone by a fault which tra- 

 verses the eastern end of the cliff; and a portion of the Red Sandstone has 

 also been forced up, so as to form the uppermost bed. This is the only 

 point at which I have observed it on the south bank of the Wear, although 

 I am informed it exists higher up, near to Hylton Ferry ; on the oppo- 

 site side, however, it forms a most conspicuous object, being there of 

 great thickness, and generally of a dark reddish purple colour, the yel- 

 low Sand forming its upper member. Above Burn's Quay is a quarry 

 where it is worked for fire-stone ; it is clo§e-grained, but not very hard, 

 and of a pretty even texture. 



In the great Pallion Quarry the Limestone is worked more than 60 feet 

 thick ; the lower Slaty beds are of a blueish-grey colour, and being found 

 to make good Lime (probably from the absence of Magnesia), they are 

 worked entirely away ; they are found to rest upon what the quarrymen 

 call " Black Stone ;" a tough brown Shale about 7 feet thick, and below 

 this the yellow Sand occurs to an unknown depth. It was in the lower 

 beds of the Limestone, in this quarry, that the Fossil Fish occurred, 

 which is figured in the 4th vol. of the Geological Transactions, Plate 11. 



In the little dell running up from the Wear towards Hylton Castle, the 

 yellow Sand may be observed, beneath the Limestone, of considerable 

 thickness. 



At Do'wn Hill, near West Boldon, we again have the Sand ; it cannot 

 be seen in the quarry, but makes its appearance at each end of the es- 

 carpment beneath the slaty beds of the Limestone j a single Fossil Fish 

 has occurred in this quarry. 



In West Boldon, Limestone is worked on the hill, below the Church ; 

 in the quarry the yellow Sand is not visible, but, it appeared, in cutting 

 the foundations of a house below, and a well not far from the gate of 

 the Rectory was begun in it ; this bed must here be of inconsiderable 



