and Argillaceous Beds, at Ballingdon Hill. 45 



us a depth of 160ft. in a perpendicular direction; at this 

 depth, the water rises and inundates the sinkings so much as to 

 prevent further progress downwards. All the chalk strata that 

 I have seen at this locality are, generally speaking, horizontal, 

 Although its strata seams are, in many quarries, undulatory 

 or wavy. Its flinty nodules are here irregularly dispersed, 

 and not in straight and parallel lines, as we often see them in 

 other chalk districts. Although in the parish of Hartest, 

 distant about seven miles in a northerly direction from the 

 spot we are speaking of, there occurs chalk, with its strata 

 dipping rapidly to a southerly direction with its flinty nodules 

 in straight lines, and dipping at the same angle as the strata. 

 The clay appears to have had no subsequent disturbance 

 since its deposition ; but that the subjacent chalk has been 

 displaced is, I think, evident, by the thick shells of the 

 Inoce ramus, and the shells of other genera, being not only very 

 much broken, but that the fragments are scattered and inti- 

 mately mixed up in the chalk. It is a very rare circumstance 

 here, to find a whole shell of an .Echinus ; although there is 

 no scarcity of the fragments of that fossil. The flints being 

 irregularly disseminated throughout this chalk, and the seams 

 of its strata being crooked or wavy, upon the small scale, is, 

 I submit, indications of subsequent displacement. The 

 natural partings of this chalk are covered with the black den- 

 dritical appearances alluded to by Mr. Bakewell, in his Intro- 

 duction to Geology, as indicative of the presence of magnesia. 

 Radiated concretions of iron pyrite are frequently found in 

 the chalk here. 



Some of the Organic Remains found in the Chalk. 



Radidta. — Ananchites. >Spatangus. 



Conchifera. — Inoceramus. Chama. Plagiostoma. 



Mollusca. — Belemnites. 



Comparing my list of the mineral substances, of which the 

 boulders and pebbles found in theclay of this hill are composed, 

 with those found occurring in the clay cliffs on the coast of Nor- 

 folk, as described by the different writers, as well as from my 

 own observation, I find there is a striking similarity ; and the 

 organic fossils, so frequently found in the intervening localities, - 

 strengthen the analogy. Mr. R. C. Taylor, in his Geology 

 of East Norfolk, gives us a list of boulders washed out of the 

 cliffs west of Cromer, of very nearly the same properties as my 

 own : his are primary, secondary, and trap specimens ; so 

 are those found in the clay of Ballingdon Hill: and Mr. 

 Woodward, in his Outline of the Geology of East Norfolk, tells 

 that the blue clay cliffs which extend from Hasbro' to Cro- 

 mer are evidently the wreck of the lias. With the assistance 



