152 MR. a. j. jukes-browne on [May 1906, 



take it from 600 down to about 400 feet, and finally patches near 

 Whitchurch carry it down to 300 feet. 



The natural inference from these facts is that we are following a 

 slope which coincides approximately with the inclination given to 

 the basal plane of the Eeading Beds by post-Eocene disturbances ; 

 and that, when allowance has been made for solution, downwash, 

 and landslips, the tracts of Clay-with-Flints may be 

 regarded as having been formed out of the remnants of 

 so many ancient outliers of Eeading Beds. This view 

 receives a striking confirmation from the fact that at East Stratton, 

 only 7 miles south-east of Whitchurch, an outlier of the Eeading 

 Beds actually occurs at a level of about 300 feet, and is surrounded 

 by patches of Clay-with-Flints. I shall recur to this outlier in 

 the sequel (p. 155), as it comes within the area of Sheet 300 ; but 

 its existence testifies to the low level at which the Lower Eocene 

 deposits originally lay over this part of Hampshire, and to the 

 small vertical thickness of chalk which has been removed from the 

 post-Eocene surface. 



Proceeding to the area south of Andover and Whitchurch (Sheet 

 299), we find a wide tract over which Clay-with-Elints either is 

 absent, or occurs only in small scattered patches. This tract 

 coincides with the anticline of Stockbridge, which was first 

 discovered and described by Prof. Barrois. 1 He regarded it as a 

 continuation of the Winchester uplift ; but, on this point, I venture 

 to differ from my friend and confrere, believing it to be an 

 independent periclinal dome which may be prolonged for some miles 

 to the westward, but dies out rapidly to the east. 2 However this 

 may be, it is doubtless a post-Eocene uplift, and consequently an 

 area over which subaerial detrition has been great. If, therefore, 

 Clay-with-Flints were a Chalk-residue, it should be in strong force; 

 while if it be derived from the Eocene, it is easy to understand its 

 absence, except for two small patches near Stockbridge itself. 



The western part of the area in Sheet 299 adjoins that of 

 Salisbury (Sheet 298), and the flexures noticed in the latter are 

 continued eastward to the valley of the Test. The anticline on the 

 south passes through Dean Hill and dies out toward Lockerley. 

 The syncline filled with Eocene deposits which runs eastward 

 from Alderbury also seems to disappear near Mottisfont ; while the 

 Stockbridge uplift above mentioned is probably a development of 

 the monocline traced to the north of Clarendon. 



A glance at the geological map will show that tracts of Clay- 

 with-Flints occur in connection with these flexures, and are disposed 



1 ' Recherckes sur le Terrain Cretace de l'Angleterre & de l'lrlande ' 1876, 

 p. 52. 



2 The curvature of the Stockbridge flexure must be slight and low, for the 

 zone of Micrasten cor -test udinarium has only been found near Stockbridge ; and 

 Mr. C. Griffith, F.Gr.S., informs me that to the westward, along the valley of the 

 Wallop, all the pits seem to be in the zone of M. cor-anguinum, while north- 

 ward at Grately he found Uintacrinus-chalk, and southward still higher beds 

 come in. 



