CORRELATION OF THE BOURNEMOUTH BEDS. 211 
the Bracklesham series and are, unlike those of Alum Bay, of Middle 
and not Lower Bagshot age, as had, I believe, been hitherto supposed. 
I have also ascertained that a great portion of the cliffs between the 
Head and Bournemouth are of marine origin and highly fossiliferous, 
and these I describe in detail. These marine beds are of two di- 
stinct characters; and both of them I have traced across to Alum 
Bay, where they are well represented. 
The strata forming the promontory are higher in the series than 
those on the west, but below the Highcliff beds; and they can 
also, as divided by Lyell, be separately traced across to Alum Bay. 
No detailed correlation has, I believe, been previously attempted. 
Highcliff Sands—At Highcliff (fig.1), nearly under Rothsay Castle, 
the section is substantially as given by Mr. Fisher* :— 
ft. in. 
_ (Coarse, green, sandy clay, with grains of quartz. “ The 
5 | tool gives a bright green streak.” 2.02. .00.....-2c0s2ceseeee 8 
= Indurated marly clay with ‘‘ tabular soft septaria.” ...... 7 
fq | Dark green, coarse, sandy clay, “ giving a bright green 
Nepeecealkevmithythentoolg ion. va dcveuscnacacsmeetcy somerset cialis 9 0 
( ‘‘ Pebble-bed towards the W., changing H. into soft, dark, 
| | sandy clay, with scattered pebbles and impressions of 
2 MOSUL SMA es seresanstnuaclecein ec sctsscinc eee denen a acetone meet seen cus 1 6 
s 4 Sands, clay ey at bottom. Very variable W. ‘There is 
rz | a band of ironstone-septaria in these sands which is not 
S WEESISHEMG sure noe (sel nnesatieds es meenns veed cacdtec sed ceh ca ncouteg 33 0 
(29) || 1B evovel ox? sahieatay oY] 0) 6] esha ge Rene eAane Gonedeanenadanaoncraaseoncraeand 6 
White sand; the bottom not seen..............ceccsecseceeceee 6 0 
Fifty yards from the western termination of the cliffs, where they 
are still 50 feet high, the section has no septaria-layers; but at the 
base of the cliff we have coming in 
ft. in 
IU@GRS) Vi7lcltes) BENNE |S coododdnondoponpacqbhocgnooe epbacgboabqRsqRHObe60 10 0 
Hard, dark clayey sandstone with scattered pebbles at 
[SEIS Gadbsonosn bee anotuoqsednpeyduodeborucdnac6 socdoceracdonsoadase 1 0 
Hard yellow mottled sand shading to white ............... 6 O 
These sands dip conformably with the Barton and Hordwell series 
14° to 2° KE. The curious turn the water flowing from Christ- 
church Harbour has taken within the last few years, known as the 
Run, has fortunately revealed the section to the very sea-level; and 
it is now seen that these sands rest upon another and lower series 
of dark sandy clay with ironstone nodules. These and the 
overlying sands can be almost directly traced to the headland, 
where they form the cliffs; for at the ferry, about midway between 
them, the landing-place is on hard compact clay, upon and about 
which are lying a few identically similar ironstone nodules. The 
sands themselves, however, have not resisted denudation and, like 
the Boscombe Sands on the other side of the Head, have been re- 
moved for the space of a mile. 
* L.c.p. 88. The woodcut, however (p. 87), is incorrect, showing too great 
a dip fil a sudden curve in the strata. 
