COLE: CHALK OF YURKSHIEE. 
27 
known to exist in nature, and that, for the formations in question, 
we must seek not for an artificial, but for a natural process of 
development. 
In conclusion, we wish to draw attention to certain remark- 
able needle-shaped structures, which occur all over the chalk area 
of Yorkshire, but not apparently in the Stmth of England, and 
which are to be met wath immediately below and above the thin 
layers of fuller's earth, allud3d to above, as interfering" with the 
coherence of the chalk. They have been called " slickensides " 
by men of repute, not intimately acquainted however, with the 
phenomena — but they are not slickensides ; and a thorough exam- 
ination will prove convincingl}^ that some other explanation must 
be sought. Either they maik an incipient form of crystalization, 
or they are the remaining traces of some low form of animal life 
of the coral type, which was arrested in its growth hy the muddy 
deposits of fuller's earth, and began its work again as scon as the 
water was once more clear. 
This is a question which deserves further attention in des- 
cribing the Chalk of Yorkshire. 
GLACIAL SECTIONS NEAR BRIDLINGTON. BY G. W. LAMPLUGH. 
Part II. cliff section extending 900 yards south 
OF THE HARBOUR. 
In pursuance of my plan of describing sections in this neigh- 
bourhood which are likely to be closed to the geologist, it is 
desirable that some account should be given of the cliff-section 
which lies immediately to the south of the Harbour at Bridling- 
ton Quay, as this is already partly hidden. I have therefore 
drawn to scale a section of the cliff for a distance of 900 yards 
from the South Pier, as is shown in the accompanying plate, and 
this I now supplement, as before, with a description and notes of 
some deductions I nave drawn whilst at work on the section. 
