350 A. J. Juices Browne — On the Upper Greensand, etc. 
bold crags, marked by tbe Ordnance Station, 1350 feet above the sea- 
level ; kere tlie beds end abruptly, being cut off by tlke Craven 
fault. The position of this fault is also shown by the abrupt termi- 
nation of similar grit crags at Fancarl, by great disturbances of the 
beds at Thurskeil Well, near Hebden, and by disturbed beds on the 
banks of the Wharfe near Lyth House, whence the fault runs by 
Skiretkornes, with limestone on its north side and grit on its south, 
to join the line of bold cliffs whicli mark the line of the fault from 
Malkam to Settle. East of the river Dibb we have, north of the 
Craven fault, massive white limestone, dipping north at 19°, 
closely overlain by the grit of Grimwith Fell, from which the main 
mass of limestone is separated merely b}' a thin band of mixed 
shales and limestones. The green mass of Greenhow Hill forms the 
dome-shaped end of this band, which is in fact an anticlinal, broken 
up by the Craven fault. Between the river Dibb and Grassington 
the ground is very obscure; but the Millstone-grits seem to be 
separated from the great limestone by a considerable thickuess of 
shales, with but poor limestone bands. At Grassington, kowever, 
the limestones swell out, and with the exception of two bands of hard 
sandstones, known as the Dirt Pot Grits, there is solid limestone 
from the grits of Grassington Moor to the river Wharfe. North - 
wards the limestone gradually breaks up, and finally takes on the 
Yoredale type, so well known from the writings of Professor 
Phillips. 
III. — Notes on the Correlation of the Beds constituting the 
Upper Greensand and Chloritic Marl. 
By A. J. Jukes Browne, B.A., F.G.S. ; 
of H.M. Geological Survey. 
C ONSIDERABLE uncertainty has for some time existed with 
regard to the formations known by the names of Upper Green- 
sand and Chloritic Marl. 
The series of beds which are thus denominated have been accurately 
described as they exist in several different localities, and the strata 
supposed to constitute these divisions have been shown to vary greatly 
both as regards their lithologic d characters and tkeir fossil contents ; 
but very few attempts have been made to ascertain the lateral ex- 
tension and the exact stratigrapkical relations of these component 
beds ; they have been like the fragments of a puzzle which no one 
has succeeded in putting together. 
Geologists, indeed, were for a long time contented to receive all 
the sandy and glauconitic deposits intervening between the Gault- 
clay and the Chalk-marl of any locality in England as belonging to 
the Upper Greensand. Afterwards, when the Chloritic Marl was 
separated from the series in the Isle of Wight, its existence in other 
parts of England was not properly establisked — or, to speak more 
correctly, different inland horizons were assigned to it by different 
writers. 
The type of the Upper Greensand was supposed to exist in 
