How To Use pitchstone In A Sentence
- Sardara, Ploaghe, and other places; and considerable extents of trap and pitchstone are frequently met with on limestone strata, while others, tending fast to decomposition, are incorporated with an earth formed of comminuted lava. Rambles in the Islands of Corsica and Sardinia with Notices of their History, Antiquities, and Present Condition.
- The whole northern and lower portion of the island had vanished, except an isolated pitchstone rock, ten yards square, and projecting out of the ocean with deep water all around it. Complete Story of the San Francisco Horror
- When the basis of the lavas of the Malpays changes from pitchstone to obsidian, its colour is paler, and is mixed with grey; in this case, the feldspar passes by imperceptible gradations from the common to the vitreous. Travels to the Equinoctial Regions of America
- This feature was once described as ‘the finest ‘small’ mountain feature in the British Isles ’, and is in reality an east-west ridge of volcanic rock which appears as a narrow upthrust of columnar pitchstone when seen from the south or east.
- Similarly, Arran pitchstone has turned up in Ireland and Orkney, highlighting the complex exchange networks between these places.
- I even thought, with many other geologists, that obsidian, so far from being vitrified lava, belonged to rocks that were not volcanic; and that the fire, forcing its way through the basalts, the green-stone rocks, the phonolites, and the porphyries with bases of pitchstone and obsidian, the lavas and pumice-stone were no other than these same rocks altered by the action of the volcanoes. Travels to the Equinoctial Regions of America
- This feature was once described as ‘the finest ‘small’ mountain feature in the British Isles ’, and is in reality an east-west ridge of volcanic rock which appears as a narrow upthrust of columnar pitchstone when seen from the south or east.
- Also found was a flake of green Arran pitchstone, thought to be a waste fragment from the manufacture of a tool.
- Most of our ground sits beneath the shadow of An Sgurr, a 1,289ft solidified lump of pitchstone lava. Back to the land: from London to sheep farming on Eigg
- Their flanks were blotched with a livid nitrous efflorescence, with flaring sulphur, unhealthy verdure of pitchstone, streaks of arsenical vermilion; their beds -- a frantic maze of boulders. South Wind
