TRANSACTIONS OF SECTION C. 799 
Sea which formed the Basement clay had, at this period, so far receded as to leave 
a hollow between its western margin and the eastern moorlands, it is conceivable 
that the Teesdale glacier and other northern British ice may have crept down the 
valley, overriding the old moraine and all except the highest of the gravel mounds. 
It is suggested that the shrinkage of the extra-British ice concurrently with the 
increase of ice within our own borders, for which there is much evidence, may 
have been brought about by the shifting westward of the main area of snow pre- 
cipitation, and therefore of ice formation, consequent upon the encroachment of the 
high plateau of the ice-sheet upon the surrounding seas and the wide obliteration 
of the open water-surface. 
The Upper clay is often very loose in texture, and sometimes passes insensibly 
into sand and gravel, and it is possible that it may have been formed through the 
gradual melting of the icy covering and the resultant deposition of the insoluble 
residue, as suggested by J. G. Goodchild for the western drifts. 
The arrangement of the Yorkshire drifts into Upper and Basement Boulder 
Clays, with an intermediate series consisting partly of stratified beds and partly 
of boulder clay, would remove many of the difficulties which have prevented their 
correlation with the glacial deposits of surrounding areas. 
6. Final Report on an Ancient Sea Beach near Bridlington.—See 
Reports, p. 375. 
7. On Liassic Sections near Bridport, Dorset. 
By Joun Francis Waker, M.A., F.G.S. 
The author refers to descriptions by Day, H. B. Woodward, and Buckman, 
and then gives the results of his own observations in 1887 and 1888 :— 
(1) The roadside cutting in North Allington shows the following section in 
descending order: (a) clay, (6) stone 2 feet 4 inches, consisting of 8 inches white 
limestone, 1 inch clay, 11 inches pink limestone, 8 inches marlstone, (c) 3 feet 
2 inches sandy clay, (@) 5 inches brown sandy limestone, (e) about 6 feet sandy 
marl obscured, (f) 2 feet, 1 inch brown friable sandstone; the brickfield below 
contains another stone band embedded in clay with Rhynchonella amalthet and 
Monotis inequivalvis. The stone band (d) contains fossils corresponding with 
those of the brown sandy limestone of the beach, Rhynchonella tetrahedra vay. 
Northamptonensis, Rh. furcillata, Waldheimia perforata var., Spiriferina pinguis, 
Monotis inequivalvis, Pholadomya ambigua, Pleuromya sp., Belemnites. 
(2) In the field, opposite, the following section was exposed in 1887: soil 
6 inches, (a) hard clay 2 feet, ferruginous marl 8 inches, (6) white stone and pink 
sandy stone 14 inches, marlstone 6 inches, (c) sandy clay. The pink rock yields 
Rh. Bouchardi, and in its upper part, Ammonites striatulus ; the warlstone blocks 
yield Rh. tetrahedra, Rh. fallax, Rh. serrata, Terebratula punctata. 
(8) A section at Shoots Lane, Symondsbury, somewhat overgrown, shows: (0) 
white and pink rock 18 inches, brown rock 2 feet 6 inches, (¢) brown sandy clay 
3 feet ; the brown rock contains RA. serrata in the upper part and Rh. tetrahedra 
in the lower. 
.(4) Information from the workmen, and measurement of the blocks removed, 
indicate that the following section was revealed at Shipton Long Lane, Bothen- 
hampton, in a hole on the roadside, which was blasted for road metal and subse- 
quently filled by order of the police: Unfossiliferous sandstone 4 inches, top bed of 
white stone 14 inches, brown stone | foot, brown and pink stone 2 feet, marlstone 
1 foot, bluish unfossiliferous limestone 8 inches. The marlstone becomes more red 
towards the top, and is covered in some blocks by the pink rock, containing ferrugi- 
nous oolitic grains, in others by a sandy conglomerate, which appeared to change 
gradually into the hard red (or in places cream-coloured) rock. The marlstone 
contains Ammonites spinatus; in its lower part are Rh. tetrahedra, Rh. fallax, T. 
punctata, W. perforata var., W. resupinata, (but no Rh. acuta); in its upper part 
