426 lamplugh: notes on coast between bridlington and filey. 
I shall presume that the chief attention of the members in their 
further progress north-eastward will now be directed to the Chalk. 
They might however still profitably give an eye now and again to 
the capping of drifts, of which a detailed description, with figures, 
will be found in Q. J. G. S., Vol. XLVIL, pi. xiii., p. 384. 
"With regard to the Chalk, there is still much work to be done in 
working out its subdivisions and thickness. I had made some pro- 
gress in this direction before leaving the neighbourhood, and had 
intended to do more. Possibly I may find it practicable before long 
to sum up for this Society the information already obtained, in the 
hope that it may be of use to future workers. 
The fossil Sponges, for which the Chalk of Flambro' Head is 
celebrated, will be found most plentifully between Sewerby and Danes 
Dyke, being quite rare to the eastward of the latter place. Marsupites 
ornatus, another interesting fossil, is abundant, though usually in an 
imperfect condition, in a band which rises into the cliff two or three 
hundred yards west of Danes Dyke. Up to the South Sea Landing 
there is a steady rise of the Chalk northward, but beyond it the strata 
lie more nearly horizontally, partly owing to the cliffs here being 
nearly along the strike of the beds ; and in going thence to the 
extreme point of the headland we pass very little lower in the series. 
The numerous small faults which break the Chalk may be noted 
in passing. I measured a large sequence of them, under the impres- 
sion that they might prove in the aggregate to represent a consider- 
able throw in one direction ; but the investigation showed that they 
frequently nullify each other, and that they probably mask what in 
less jointed beds would take the form of low undulations of the strata, 
No flint occurs in the Upper Chalk, but nodules of this substance 
make their appearance on the shore at High Stacks, a little south of 
the Lighthouse, and thence are brought rather rapidly to the cliff top 
at the Fog-gun House by the renewed rise of the Chalk consequent 
upon the alteration in the trend of the cliff-line. 
If the members have time to visit this locality they will find 
many points of interest. An ancient ravine in the Chalk has been 
buried under the drifts here (such as may be noticed also at South 
Sea Landing and at Danes Dyke), and has given rise to a curious 
