564- Outlines of the Geology 



d, Bed of similar materials to the last; but the grains are so 



large as to amount to pebbles - - - - 1 ft. 



e e, Bed of small-grained sand and sandstone, divided irregu- 

 larly by linear intersecting concretions, an inch or two wide 3 



f, Bed similar to d, - - - - 1 



g, The upper part of the grey stone. 



Wherever any good section of this bed has been obtained, 

 it uniformly is observed to retain the same characters. In 

 Nettleton Valley it becomes very thin, and in some places is 

 almost lost. No traces of fossils have yet been found in it, 

 though we examined it very carefully. 



Grey Stone is the term which has been provincially given to 

 the bed which underlies the Thoresway sand ; and the name 

 has been retained for want of a better : it will be seen from 

 the map that it forms the brow of Nettleton Hill, and may 

 be seen under the sand, through the whole eastern side of the 

 valley beneath : it also forms the bottom of Thoresway and 

 Rothwell Vales. It is well exposed, in various places, on the 

 brow of Nettleton Hill : the following section is obtained 

 there : — 



Diluvium, 1 ft. to 2 ft. Ochrey hard stone, with reddish 



Jtubbly sandy stone, 2 ft. cores, 3 ft. 



Soft earthy ferruginous stone, 1 \ ft. Sandy rubble, a ft. 

 Sandy, reddish, loamy rubble, 1ft. Alternating beds of earthy rubble, and 



very hard stone, with blue cores. 



The stone from the lowest of these beds is occasionally 

 burnt for lime, and is very generally used for building. 

 The following is the list of organic remains: — 



A'stacus rostratus. Exogyra laevigata. 



Serpula plexus. Exogyra laevigata var. ? 



Serpula antiquata? Gryphae v a sinuata. 



Serpula . Trigonia ; a large species, 



Vermicularia. agreeing, in many characters, with 



Lutraria gibbosa. T. angulata, but without a crenu- 



Lutraria ambigua. lated line. 



Lutraria . Trigonia ; nearly approaching 



Pecten orbicularis. to T. gibbosa. 



Pecten cinctus. This appears to be Venus . 



a very characteristic shell : we Terebratula media. 



have not observed it in any other Terebratula globata. 



bed. There are specimens in the Terebratula obtusa ? 



museum of the Hull Literary and Belemnites fusiformis. 



Philosophical Society, more than Belemnites ; a large species, 



double the size of Mr. Sowerby's remarkably flattened on one side. 



plate. Ammonites lewesiensis ? 



Pecten . Ammonites ; very similar to 



O'strea carinata. A. Beudanti Cuvier and Brong., 



O'strea edulina, jun. ? vii. 2., but more depressed, and 



Plagiostoma rigidum, jun. covered with waved ribs; one 



Plagiostoma . long, and from two to five short. 



Dianchora striata ? A fragment of a large shell, which 



