4 GEOLOGY. 



to Kingsgate. The Ammonites occur from 4| to 60 feet below this line ; 

 32 specimens were found at an average of 12 feet, and 25 specimens at 

 an average of 20 feet. 35 specimens were identified as A. lejptophylluSj 

 4 as A. Lewesiensis, and 1 as A. peraTnplus ; but the author suggests 

 that these three forms may be identical. The Ammonite zone, covering 

 a depth of between 55 and 56 feet, contains no layers of flints ; but 

 there arc flints occasionally scattered through it. 



Two bands of flint are particularly mentioned. The upper forms 

 a solid floor of flint, 3 to 4 inches thick, and is known by well-diggers 

 all over the island. The lower lies 31 feet below this; it is a foot 

 or more thick, and resembles a large mass of irregular honeycomb. 

 At irregular intervals there are vertical columns of flint uniting this 

 band with the one above. At Pegwell Bay 51 feet of chalk, which 

 is to be seen on the Margate qH&s, is said to be wanting. "W. T. 



Bed WELL, F. A. On Ammonite zones in the Isle of Thanet. Proc. 



Geol. Assoc, vol. iii. no. 5, pp. 217-238. Map and sections as in 



Geol. Mag. 

 This is a shorter notice of the facts stated in the foregoing paper. 



Beeslet [T.]. Excursion to Banbury. Proc. Geol. Assoc, vol. iii. 

 no. 5. pp. 197-204. 



Notices sections of Middle Lias near Banbury, of the Ironstone- 

 quarries at King's Sutton and Adderbury, and of the Great Oolite near 

 Broughton and Tadmarton Heath. W. W. 



Bennett, Captain S. Remarks on Metalliferous Yeins. Rep. Miners' 



Assoc. Cornwall and Devon for 1873, pp. 1-8. 

 The principal object is to show that nearly all good lodes in Cornwall 

 and Devon dip towards granite or an elvan dyke. C. L. N. F. 



Blake, Rev. J. F. Note on the Red Chalk in Yorkshire. Geol. 

 Mag. dec. 2, vol. i. pp. 362-364 (woodcut). 



The author describes a section near Givendale church [wrongly de- 

 scribed beneath the woodcut as near Ripon, "W. R. of Yorkshire], in 

 which is Red Chalk containing Ammonites Deshayesi ; it rests on con- 

 glomerate, and this on sandstone the age of which is doubtful, but 

 which is unlike any Oolitic sandstone of the district. In other places in 

 the neighbourhood conglomeratic beds and sandstones underlie the Red 

 Chalk. It is suggested that these may be littoral deposits formed in 

 hollows. Subsequent depression enabled the Red Chalk to spread over 

 a wide area, but not without interruptions; for there are gaps and 

 varieties of level'in the Red Chalk that may be better accounted for by 

 an irregular surface than by faults. 



Red Chalk is found in the White Chalk at Warter ; this is simply 

 ordinary chalk coloured red ; but the true Red Chalk, or Hunstanton 

 Rock, generally has much sandy matter and small round grains of the 

 same dark rock which furnished the older conglomerate. Near Lon- 

 desborough the White Chalk contains some layers of brown carbona- 

 ceous clay. W. T. 



