Reviews— Geology of Wellington and Chard. Lie 
Perranporth, and St. Agnes. About half the area represented is sea. 
In ascending order the formations shown are: (1) Dartmouth Beds 
(Lower Old Red Sandstone), purple and green fine-grained sandy 
micaceous shales or slates, with occasional bands of grit, and containing 
fish-remains (Pleraspis cornubicus, etc.). ‘They occur in a faulted and 
much broken anticline which has its crest in Watergate Bay and 
measures 43 miles from east to west by 2 miles from north to south. 
(2) Lower Devonian Meadfoot Beds, which occupy about one-half of 
the land area shown, chiefly to south, but also in a narrow band to 
north of the Dartmouth Beds. The Meadfoot Beds consist of shales, 
slates, and thin limestones, and seem to rest quite conformably on 
and to pass gradually down into the Dartmouth Beds, (3) Lower 
Devonian Staddon Grits on the north, Ladock Beds (basal Devonian) 
on the south. These consist of silts, sandy slates, sandstones, and 
coarse grits. The Staddon Grits (so far as shown) occupy an area 
33 miles from east to west by 14 from north to south in the north-east 
corner of the map. They strike east-south-east, and this strike if 
prolonged would make them meet and be continuous with the similar 
grits of Ladock on the south side of the anticlinal axis (of Dartmouth 
Beds and Meadfoot Beds), The continuity, however, is broken by the 
intrusion of the St. Austell granite (not in map), so the southern area 
is treated separately. ‘The Ladock Beds are continuous. with the 
Grampound Beds of Sheet 352, and occupy an area 133 miles from east 
to west by 43 miles from north to south at the south of the map 346. 
Pliocene beds termed St. Agnes Sands and consisting of unfossiliferous 
sands and clays, forming an old shore-deposit, almost surround St. Agnes 
Beacon near the south-west coastline. They cover a crescentic area 
% miles long along the curve by} mile broad. Raised Beach deposits, 
Valley Gravel and Head, Alluvium and Submerged Forest, and Blown 
Sand are the remaining deposits shown. Granite occurs west of 
St. Agnes Beacon and at Cligga Head, and is surrounded in each 
case by an aureole of metamorphism. Elvans or quartz porphyries, 
lamprophyres or mica traps, and greenstones are shown. 
A section below the map shows the structure of the country 
between Denzell Downs on the north-east cutting across the anti- 
cline of Devonian rocks, by Perranporth to St. Agnes Beacon on the 
south-west. B. Hosson. 
II.—Memorrs oF THE GeroLogicaL Survey, EneLanD anD WALES. 
EXPLANATION oF SHEET 311: THE GroLocy or THE CoUNTRY BETWEEN 
WELLINGTON anD Cuarp. By W. A. E. Ussuer, F.G.S.; with 
contributions by H. B. Woopwarp, F.R.S., and A. J. Jukes-Browne, 
B.A., F.G.S. 8vo; pp. vi and 68. Price 1s. 3d.; colour-printed 
map, ls. 6d. E. Stanford, 12-14, Long Acre, London, 1906. 
(Issued February, 1907.) 
fJXHE Geological Survey have issued (price 1s. 6d.) Sheet 311 
(Wellington) of the New Series of one inch to one mile (334<0) 
colour-printed maps of England and Wales. The area comprised in 
the map includes the southern suburbs of Taunton at the northern 
margin, Ilminster close to the eastern border, Chard 3} miles from the 
DECADE V.—VOL. IV.—NO. IV. 12 
