11. Ganister ( hard sandstone ) and dolerite ( whinstone , basalt ) have also been quarried in the past in Weardale. 12. On this trip, she has brought a colorful snail shell from home to hide within the hard whinstone once quarried here. 13. Similarly, " The Whinstone Drift " ( 1951 ) is convincingly set against a Northumberland coal-mining background. 14. The castle was constructed from Whinstone and the sole remaining north and south walls are 4 feet thick and 20 feet high. 15. "' Whinstone "'is a term used in the quarrying industry to describe any hard dark-coloured rock. 16. Rangitafu was a block of whinstone , about five feet long, a foot and a half broad, and a foot thick. 17. An 1856 map shows a brewery at the west end of the village, and whinstone quarry to the north of the main road. 18. Barhoise Mill is a T-shaped two storey construction of granite, whinstone and slate, which is falling into a dilapidated state. 19. The ruins of this medieval tower are of whinstone and were lime mortared and lie 100 metres to the east of the Auchencloigh Farm. 20. Popularly known as " The Pencil ", this tall, pencil-shaped, conical-roofed tower is built out of ashlar blocks of whinstone .
