230 PEOCEEDINGS OF THE GEOLOGICAL SOCIETY. [Apr. 3, 



le-Marsh. This spot is distant, in a direct line, exactly 20 miles 

 from the cliif-section at Hunstanton ; and near it the Chalk strata 

 sink under the great mass of Boulder- clay and other Drift which 

 form the substratum of the Lincolnshire marsh. 



The succession of beds in this pit is as follows : — 



1. Chalk-rubble. 



2. Grey, somewhat arenaceous chalk, containing innume- "1 o f •? fl- 



rable fragments ailnocerami J ^ "' 



(This bed exactly resembles that at Hunstanton, 

 which Mr. Eose has identified with the ChaUc-marP' .) 



3. Sponge-bed 1ft. 6in. 



Eesembling in every respect the corresponding 

 bed at Hunstanton, except that here it shades into a 

 yellow colour at its lower half. 



4. Red clay less than 1 inch. 



5. A course of hght-coloured yellow and pink chalk, con- "j 



taining a very few specimens of Belemnites minimus, 1 1 ft. 6 in. 

 MiU. J 



6. Dark-red chalk, like that of Hunstanton, in courses,[with 1 o r, - ■, ., 



red-clay bands between them. Belemnites minimus, \ r ^f ^ °^ 



Mill., very abundant J '^^ ?"" 



The bottom of this bed is not seen in this pit. The 

 dip of the beds is nbout 5° E., but increases near a 

 fault which, running E. and W., throws down the 

 beds on the S. about 3 feet. 



Less than half a mile west of this point, in a large chalk-pit on 

 the road from Burgh-le-Marsh to Skendleby, occurs a second expo- 

 sure of these beds. Here we have a considerable thickness of the 

 white chalk exposed, containing fossils, among the most abundant 

 of which are Discoidea cylindrica, Lam., Holaster suhglohosa, Leske, 

 sp., Terehratula hipUcata, Sow., var., T. ohesa, Sow., JRhynchonella 

 Cuvieri, D'Orb., Inoceramus Cuvieri, Sow., Ammonites Mantelli, Sow., 

 and teeth of Lamna, The lower part of the white chalk consists of 

 dark-coloured sandy courses with innumerable fragments of Ino- 

 ceramus, In these I found a specimen of Ammonites peramplus, 

 Sow., 1 ft. 9 in. in diameter. They are succeeded by the sponge- 

 bed, white in its upper part and yellow below, which is separated 

 by a parting of red clay from two beds called by the workmen the 

 " yellow course " and the " pink course." These last are underlain 

 by the " blood-red courses " full of the characteristic Hunstanton 

 fossils, — Belemnites minimus, Mill., Terehratula hijplicata, Sow., and 

 fragments of large Inocerami being especially numerous. This pit 

 does not pass through the red chalk. 



Above the village of Candlesby there are several pits in which 

 the red chalk is seen, containing the characteristic Hunstanton 

 fossils. The succession of beds in these pits agrees in every respect 

 with that described in the last two sections. In making some lime- 

 kilns here the red chalk was passed through, and the brown sands 

 below exposed. At "Welton mill, too, a well sunk to the depth of 

 120 feet, through white and red chalk, also reached the sands. Prom 

 information which I received concerning both these works, I con- 



^' *' On the Cretaceous Group in Norfolk," Proc. Geol. Ass. 1862. 



