20 AGRICULTURAL SURVEY

Tf 2 line be drawn from Alemouth to a liitle weſt of Bywell on the river Tyne, very little of this kind of coal and limeſtone will be found to the eaft of ît; and from this line to the ſea coaít, no limeſtone whatever ap- pears, except a ſmall patch of a diferent limeſtone that puts in at Whitley, near Tynémouth, and runs from thence in a ſouth-weſterly dire&ion thro? the county of Durham,&c. In this ſpace, betwixt theſe two ranges of limeſtone, lie the caking coals of ſuperior quality above de- ſcribed, and the ſame breadth of coal may be traced thro? the county of Durham, ſtretching in the ſame direction, and bounded on the eaft and weſt, in a ſimilar manner, by ſtretches of limeſtone of different kinds.

Tt would be a curious inveſtigation to trace theſe mi- nerals thro’ the different counties acroſs the iſland, and ſhow where the frata of each ſpecies riſe to the ſurface z and the deviations cauſed in them by croſs veins or dykes, &ce. 5 we believe it will be found that very little or no coal lies to the eaſt of this line, and that no chalk lies to the weſt,

Limeſtone,—of an excellent quality, abounds thro? all Bambro? Ward, Iſlandſhire, and that part of Glendale Ward ſituated on the eaſt fide of the river Bl; xt Rretches from hence in a ſouth-weſterly direCtion thro’ the central parts of the county, and is found at Shilbottle, Longframlington, Hartburn, Rial, Corbridge,&c. and at numberleßs other places to the weſtward of theſe; but the ſouth-eaſt quarter, which is ſo rich in coal, 1s deſtitute of lime;* as is alſo that part of Glendale Ward weſt of the river Till.

Stone Marl,—-abounds in many places near Tweedhde; and Shell Marl is found in a few places in Glendale Ward. The greateſt quantity is at Wark and Sunnylaws, where it has been formed by a depoſit of various kinds of

* Except a ſmall patch at Whitley, near T ynemouth-- ells,

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