Yorkshire Naturalists Union: Annual Report, 1915. 45 
the week-end under ideal weather conditions. Two days 
were devoted to the Carboniferous limestone tract, and two 
to the Pre-Carboniferous rocks north of the Craven Fault. 
At Hambleton in the Vale of York members had an oppor- 
tunity of examining the core of a boring made in Brayton 
Barf. It revealed the geological history of the Barf very 
clearly. 
At Hebden Bridge, sections in the lower beds of the Mill- 
stone Grits and Pendlesides were visited, and a discussion took 
place on the origin of some cavities in the Kinder Scout Grit. 
These cavities are probably formed by the removal of nodular 
concretions. 
The main object of the Saltburn excursion was to observe 
the succession of the strata between the top beds of the Lower 
Lias, and the Moor Grit of the Lower Oolites, the whole of 
which were exposed within the area marked out for the week- 
end visit. Coast exposures at Huntcliff were seen to advantage, 
commencing with the jamesoni zone at its base, and continuing 
through the series to the jet rock. Inland, in the Kilton valley, 
the sequence was further traced up to the Moor Grit, but the 
luxuriant vegetation and steep nabs made it difficult to examine 
at close quarters many of the exposed horizons ; the abrupt 
lithological changes, however, and the very irregular bedding 
showing the influence of currents, were very noticeable. 
The Boulder Clay and. its crop of erratics, together with 
the origin of Cat Nab, came in for discussion, and a visit to 
Roseberry Topping to see the effects of the great landslip, the 
plant beds, and the Cleveland Dyke was included in the 
programme. 
Jurassic FLORA COMMITTEE.—Mr. J. J. Burton writes :— 
Owing to the accumulation of material awaiting expert study, 
and also because of the withdrawal by the railway companies 
of the reduced fares to Societies holding meetings, only in- 
dividual exploration has been carried on during the past year, 
and there is nothing of importance to report beyond that 
which is from time to time given in The Naturalist. 
GLACIAL COMMITTEE.—Mr. J. W. Stather reports that 
coast work has been temporarily suspended and that the chief 
observation made during the year was an important one, viz., 
a record of the erratics on Brayton Barf, near Selby, particulars 
of which appeared in The Naturalist for September, 1915. 
Coast ERosION COMMITTEE.—The sea is still eroding, but 
for obvious reasons it is not advisable nowadays to take too 
careful observations on the point. 
GEOLOGICAL PHOTOGRAPHS COMMITTEE.—The Hon. Secre- 
tary, Mr. A. J. Stather, is serving his country, but we. under- 
1916 Jan. 1. 


