Illustrations of the Geology of Yorkshire, Or, a Description of the Strata and Organic Remains of the Yorkshire Coast; Accompanied by a Geological Map, Sections, and Plates of the Fossil Plants and Animals (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1829 Excerpt: ...iron ore. Abundantly.--Grauwacke, same as in the neighbouring fells of Casterton, Hougill/fct.'., ' ':,.", r: .-: if By this list will appeal the limited extent of the current which brought together these pebbles, --no trace of granite, syenite, porphyry, greenstone, amygdaloidal slate, or any of the Cumbrian rocks which are remote from the valley;--the same data may perhaps confirm our belief thut the rock is of higher antiquity than the limestone series, for if it had been of the age of the new red formation, how could it happen that none of the limestones, gritstones, and shales of the then uplifted Penine chain, of the sources of Lune, or the neighbouring country should have found their way to this deposit? The few limestone pebbles really found in it. may have been derived from the Coniston limestone in the Shap country, but this is uncertain. Veins of calcareous spar traverse these beds, and sometimes divide the pebbles, as at Oban in Argyleshire, and in the Nagelflue of the Rigi. This proof of the posteriority of such veins to the rocks which enclose them, joined to the evidence afforded by the quartz pebble with micaceous iron ore, is of great value in limiting the question concerning the age of mineral veins.-, t r.-., ._.'.;..; r: . '.'., .: /' i i Though, as before observed, the limestone is not anv where in its higher ranges based on conglomerates, numerous and large fragments of grauwacke are often seen embedded in its lower strata, as in Kingdale, Ingleton dale, &c, and quartz pebbles, as at Underbarrow scar, Winder, &c. In a little stream descending from Moughton scar, nearly west of Horton, to the Ribble, the slate is covered by a series of beds which I did not find elsewhere. Immediately on the slate rests a layer of fragmented quartz