Mr. Winch on the Eastern Part of Yorkshire . 553 
A stratum of blue limestone containing iron, from nine to ten 
feet thick, crops out at Cold moor, four miles south of Stokesby. 
It is not met with in the cliffs at Whitby, where the borings were 
made twelve miles inland from that place, nor at Coxwold ; and 
therefore cannot be a bed in the thin coal formation. The dip of 
the strata of Coxwold is different from that on the coast. 
About three miles south of Robin Hood’s bay, a lower range of 
round topped hills rise to view. This district consists of alternate 
strata of soft yellowish sandstone and oolite limestone, which rocks 
decline in the same direction as the alum slate, till they reach the 
vale of Derwent, where the oolite is coveted in turn by the hard 
chalk. 
The oolite, which may be seen cropping out at Filey head, Pick- 
ering, Kirby moor-side, and Helmsley, is a pale yellow, or yellow- 
ish-brown limestone ; some of its beds, comprising numerous bivalve 
shells and other marine exuviae. It is used as a building stone, 
and with this material York Minster and other edifices in the 
neighbourhood are constructed. When in a state of disintegration 
from the action of the air and rain, it becomes valuable to the 
farmer as a manure ; but when burned does not make good mortar. 
On the sea beach near Scarborough, numerous masses of pea-iron 
ore lie dispersed, and the same curious mineral occurs in situ among 
rocks of this series in a ravine south of the town. This locality, 
which is the only one I am acquainted with in Britain, agrees 
exactly with the formation where it abounds in France, according 
to the testimony of Brongniart (see vol. i. p. 170). Jameson says, 
this species of ore, which is met with in Germany, Switzerland, 
and Dalmatia, yields from 30 to 40 per cent of iron. The Tyne 
Iron Company used formerly to collect it in large quantities for 
their works at Lemington. Its colour is bluish-grey, and the 
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