trap-rock

• “It comes from beneath the trap-rock, of which I shall have to speak when describing the geology of the entire country; and as it usually issues at a temperature of 72° Fahr., it probably comes from the old silurian schists, which formed the bottom of the great primeval valley of the continent.”

  Missionary Travels and Researches in South Africa

• “In the middle was the caldron of the torrent, called the “Scarfe,” with the sheer trap-rock, which is green in the sunlight, like black night flung around it, while a snowy wreath of mist (like foam exhaling) circled round the basined steep, or hovered over the chasm.”

  Mary Anerley

• “The 16th of May saw us journeying over the plain which lies between Ugombo and Mpwapwa, skirting close, at intervals, a low range of trap-rock, out of which had become displaced by some violent agency several immense boulders.”

  How I Found Livingstone

• “Immediately over our camp its waters ran over a very hard “trap-rock” of a black colour, the soil a stiff loam.”

  Narrative of an expedition undertaken for the exploration of the country lying between Rockingham Bay and Cape York

• “The hill on which I stood consisted of trap-rock, and seemed to be almost the western extremity of”

  Journal of an Expedition into the Interior of Tropical Australia

• “The summit consisted of trap-rock in nodules, and, towards the highest point, was much broken.”

  Journal of an Expedition into the Interior of Tropical Australia

• “I rode to one and found it consisted wholly of trap-rock in nodules.”

  Journal of an Expedition into the Interior of Tropical Australia

• “_The Weehawken Tunnel_ -- This tunnel is now being cut through the trap-rock for the New York, Ontario, and Western Railroad, and will be completed in a few months, but will, probably, be available as a mineralogical locality for a year to come.”

  Scientific American Supplement, No. 344, August 5, 1882

• “In many localities, the coals and lignites of different ages have been exposed to local influences -- such as the outbursts of trap-rock, or the metamorphism of mountain chains -- which have hastened the distillation, and out of known earlier groups have produced the last.”

  Scientific American Supplement, No. 362, December 9, 1882

• “Then he told them that good gravel, tough limestone and trap-rock were good road materials.”

  The Library of Work and Play: Gardening and Farming.

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