| 单词 | porphyritic rock |
| 例句 | His marble was perhaps the porphyritic rock which it resembles when wetted by sea moisture. Nooks and Corners of the New England Coast 2012-02-22T03:00:25.113Z Subsequently the porphyritic rock flowed over the surface in a pasty mass, covering the limestone. Scientific American, Vol. XLIII.?No. 1. [New Series.], July 3, 1880 A Weekly Journal Of Practical Information, Art, Science, Mechanics, Chemistry, And Manufactures 2012-01-05T03:00:30.823Z At the base there is frequently a conglomerate or tuff of porphyritic rocks. Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 2 "Bohemia" to "Borgia, Francis" Clothed at its base in a misty raiment of purple, the royal hill lifted above the valley an Olympian crest of porphyritic rock into the fathomless blue. The Strollers The situation of the mines was picturesque; grand hills of porphyritic rock, and pine-forest everywhere. Anahuac : or, Mexico and the Mexicans, Ancient and Modern An hour and a half below Songa, the Quorra rushes with great force through a natural gap, such it seems to be, between porphyritic rocks rising on each side of the channel. Lander's Travels The Travels of Richard Lander into the Interior of Africa The junction of Galaa Creek is remarkable for two porphyritic rock islands, situated in the bed of the river, which is here sandy, well watered, and about 300 yards wide. Narrative of the Overland Expedition of the Messrs. Jardine from Rockhampton to Cape York, Northern Queensland Some of the porphyritic rocks above mentioned are highly quartzose, others very feldspathic. The Student's Elements of Geology The andesite is covered by strata of dark-coloured, crystalline, obscurely porphyritic rocks, and above them by the ordinary porphyritic conglomerates,—the strata all dipping away at a small angle from the underlying mass. Geological Observations on South America The soil, in fact, was bestrewn with quartz and porphyritic rocks. Five Weeks in a Balloon |
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