| 单词 | amygdaloidal |
| 例句 | Heulandite occurs with stilbite and other zeolites in the amygdaloidal cavities of basaltic volcanic rocks, and occasionally in gneiss and metalliferous veins. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 4 "Hero" to "Hindu Chronology" 2012-04-04T02:00:56.447Z Its original repository appears to have been the volcanic and amygdaloidal rocks about its sources, which have been extensively broken down by geological mutations, during ante-historical periods. Scenes and Andventures in the Semi-Alpine Region of the Ozark Mountains of Missouri and Arkansas 2011-07-10T02:00:18.883Z When the vesicles are filled up with some mineral, the rock is said to be amygdaloidal, from the almond shape assumed by the kernels filling the cavities. Geology 2011-02-20T03:00:12.660Z Apophyllite is a mineral of secondary origin, commonly occurring, in association with other zeolites, in amygdaloidal cavities in basalt and melaphyre. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 3 "Apollodorus" to "Aral" The only rocks noticed when we crossed these hills on the late journey, were clay-slate, greenstone, and dark red sandstone, sometimes containing white calcareous concretions, resembling an amygdaloidal rock. Narrative of a Second Expedition to the Shores of the Polar Sea Chabazite occurs with other zeolites in the amygdaloidal cavities of basaltic rocks; occasionally it has been found in gneisses and schists. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 7 "Cerargyrite" to "Charing Cross" Volcanic ash, or bole, is frequently found separating the different lava-flows; and in the upper amygdaloidal sheets numerous secondary minerals are found, such as quartz, agate and jasper, stilbite and chlorite. Volcanoes: Past and Present What is meant by the terms amygdaloidal and porphyritic? Geology 2011-02-20T03:00:12.660Z The lavas comprise dark pitchstone, resembling that at Kirk Yetholm, and porphyritic and amygdaloidal andesites and basalts. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" Both have their edges much rounded, as if, ere their deposition in the conglomerate, they had been long exposed to the wear of the sea; and both are composed of an earthy amygdaloidal trap. The Cruise of the Betsey or, A Summer Ramble Among the Fossiliferous Deposits of the Hebrides. With Rambles of a Geologist or, Ten Thousand Miles Over the Fossiliferous Deposits of Scotland Crystals are found as a rarity in the amygdaloidal cavities of igneous rocks. Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 3 "Banks" to "Bassoon" The summit of Machacha is composed of a dark igneous rock, apparently a sort of amygdaloidal trap, with white and greenish calcareous crystals scattered through it. Impressions of South Africa They are seldom amygdaloidal, but when they are so it is generally towards the centre of the mass. Geology 2011-02-20T03:00:12.660Z It was one of those mountain torrents common in Mexico—spots of still water alternating with cascades, that dash, and foam over shapeless masses of amygdaloidal basalt. The Rifle Rangers There was no outlet, for it was a cul-de-sac—a natural court—such as are often found among the amygdaloidal mountains of Mexico. The Lone Ranche It is a common product of alteration in igneous rocks, and frequently occurs as well-developed crystals in association with zeolites lining the amygdaloidal cavities of basaltic and other rocks. Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 "Bulgaria" to "Calgary" Some specimens of variegated pebbles and jasper were found here imbedded in the amygdaloidal rock. Narrative of a Journey to the Shores of the Polar Sea, in the years 1819-20-21-22, Volume 2 Occasionally we meet with igneous rocks which are more or less vesicular and amygdaloidal throughout their entire mass. Geology 2011-02-20T03:00:12.660Z These ranges and isolated hills are all of the same sandstone formation, and capped with basalt, more or less amygdaloidal. Rambles and Recollections of an Indian Official Some specimens of variegated pebbles and jasper were found here embedded in the amygdaloidal rock. The Journey to the Polar Sea Chapman told me how in pockets or huge amygdaloidal cavities, this white phosphorescent substance was quarried, brought up bodily perhaps in the slow upheaval of the region from the deep-seated sources of this mineral flood. The Certainty of a Future Life in Mars In some of the fragments on Mount Napier these cells or pores were several inches in diameter and, unlike amygdaloidal rocks, all were quite empty. Three Expeditions into the Interior of Eastern Australia, Volume 2 The structure in one of these specimens approaches to the amygdaloidal. Narrative of a Survey of the Intertropical and Western Coasts of Australia Performed between the years 1818 and 1822 — Volume 2 In India agates occur abundantly in the amygdaloidal varieties of the Deccan and Rajmahal traps, and as pebbles in the detritus derived from these rocks. The Project Gutenberg Encyclopedia Volume 1 of 28 I ascended one, and found it was capped with trap rock in amygdaloidal nodules. Journal of an Expedition into the Interior of Tropical Australia On some of the ranges we crossed, the rocks were amygdaloidal, containing nests of a white zeolite, the fractured planes of which glittered like gems on the pathway. The Naturalist in Nicaragua They consist almost exclusively of greenstone, becoming, in a few instances, earthy and amygdaloidal. The Student's Elements of Geology Still further north, near S. Anna, where the Parana makes a remarkable bend, M. Bonpland found some singular amygdaloidal rocks, which perhaps may belong to this same epoch. Geological Observations on South America Here and there masses of highly cellular and amygdaloidal lavas protrude. Volcanic Islands This hill consisted of amygdaloidal trap in nodules, the crevices being filled with crystals of sulphate of lime, and there were many round balls of ironstone, like marbles or round shot, strewed about. Journal of an Expedition into the Interior of Tropical Australia Bed 1 consists of reddish and brownish porphyry varying in character, and in many parts highly amygdaloidal with carbonate of lime, and with bright green and brown bole. Geological Observations on South America One-half is scoriaceous, the pores being perfectly empty; the other part is amygdaloidal, the pores or cells being mostly filled up with carbonate of lime, forming white kernels. The Student's Elements of Geology The commonest lava is blackish-grey or brown, either vesicular, or amygdaloidal with calcareous spar and bole: most even of the darkest varieties fuse into a pale-coloured glass. Geological Observations on South America Near the coast there are several varieties of basalt, some abounding with large crystals of augite and tarnished olivine, others compact and earthy,—some slightly vesicular, and others occasionally amygdaloidal. Volcanic Islands Some of the grey and purplish varieties are thickly speckled with green earth and with white crystalline carbonate of lime; others are largely amygdaloidal with green earth and calcareous spar. Geological Observations on South America Dana, in an excellent paper on Trap-rocks "Edinburgh New Philosophical Journal" volume 41 page 198, has argued with great force, that all amygdaloidal minerals have been deposited by aqueous infiltration. Geological Observations on South America It may be traced for many miles, passing through the amygdaloidal and other traps of the hill called Norman's Law in that parish. The Student's Elements of Geology One of the commonest stratified porphyries is of a green colour, highly amygdaloidal with the various minerals described in the preliminary discussion, and including fine tabular crystals of albite. Geological Observations on South America Another variety was of a dull- red colour, having a claystone brecciated basis, including specks of oxide of iron and of calcareous spar, and amygdaloidal with green earth: there were apparently several other varieties. Geological Observations on South America Even the underlying porphyries at Copiapo. with their highly amygdaloidal surfaces, do not appear to have flowed under great pressure. Geological Observations on South America |
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