| 单词 | rhyolite |
| 例句 | In Savennières, the vineyards are largely schist, sandstone and rhyolite, a volcanic rock. For Savennières, Age Comes With Benefits 2017-11-24T05:00:00Z The rest spilled across this ancient seabed and formed a fine-grained rhyolite. One night in the nation’s first big-game wildlife refuge 2021-12-09T05:00:00Z Examples of rhyolite include several lava flows in Yellowstone National Park and the altered rhyolite that makes up the Grand Canyon of the Yellowstone. An Introduction to Geology 2017-01-01T00:00:00Z Watching these subtle changes could also help with predicting future rhyolite eruptions. Forget oil or water. In Iceland, well diggers seek to tap a volcano's magma 2021-09-14T04:00:00Z Here's how you get garnets grown in rhyolite: The Astonishing Origin of Garnets in Rhyolite 2019-02-03T05:00:00Z Girard, G. & Stix, J. Rapid extraction of discrete magma batches from a large differentiating magma chamber: the Central Plateau Member rhyolites, Yellowstone caldera, Wyoming. A compositional tipping point governing the mobilization and eruption style of rhyolitic magma 2017-12-12T05:00:00Z Tests on the rhyolite reveal that the most simple explanation - that the magma incorporated some high-silica crustal rock - isn't the right one. Treat Bag Geology 2017-10-28T04:00:00Z Lava domes are accumulations of silica-rich volcanic rock, such as rhyolite and obsidian. An Introduction to Geology 2017-01-01T00:00:00Z No one is sure how the continent-forming magma originates; one idea is that basaltic magma gets altered by seawater, remelts, and eventually erupts from volcanoes as rhyolite. Forget oil or water. In Iceland, well diggers seek to tap a volcano's magma 2021-09-14T04:00:00Z In the nineteen-seventies, the U.S. government built a dam on the Snake River in Idaho, atop a foundation of deeply fractured layers of basalt and rhyolite. A Bigger Problem Than ISIS? 2016-12-25T05:00:00Z Calcalkaline rhyolites produce the largest explosive volcanic eruptions, but these eruptions can switch repeatedly between being effusive and explosive. A compositional tipping point governing the mobilization and eruption style of rhyolitic magma 2017-12-12T05:00:00Z It’s hemmed in by peaks composed of a volcanic rock called rhyolite, which takes on an array of colors: orange, gray, green, and black. The Civilian Saviors of Iceland 2015-11-09T05:00:00Z Each eruption created large rhyolite lava flows as well as pyroclastic flows that solidified into tuff formations. An Introduction to Geology 2017-01-01T00:00:00Z This explosive eruption produced rhyolite - the rock that creates the "incredibly sticky magma" that results in these strange obsidian flows. Volcanic lava that flows for a year 2013-11-07T02:55:29Z At his feet are four containers, each filled with a different type of ground rock—granite, basalt, rhyolite or schist. Rock Tasting at Biosphere 2 2012-12-11T14:15:00.217Z The authors confirm that such a compositional tipping point exists in the global geochemical record of rhyolites, which separates effusive from explosive deposits. A compositional tipping point governing the mobilization and eruption style of rhyolitic magma 2017-12-12T05:00:00Z The volcanoes are made of sticky, slow-moving rhyolite lava. Salton Sea Volcano Mystery Solved 2012-10-28T20:17:14.297Z They are usually found in igneous rocks, such as granite, rhyolite, and basalt as well as metamorphic rocks and detrital sedimentary rocks. An Introduction to Geology 2017-01-01T00:00:00Z Dr. David A Johnston posing with a rhyolite dome in the Valley of Ten Thousand Smokes, Alaska, in June 1978. Dedication: The Geologists Who Died at Mount St. Helens 2012-05-30T16:15:17.867Z Their felspar ranges from oligoclase to andesite and labradorite, and is often very zonal; sanidine occurs also in some dacites, and when abundant gives rise to rocks which form transitions to the rhyolites. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 8 "Cube" to "Daguerre, Louis" 2012-01-31T03:00:17.257Z We identify a critical compositional tipping point, independently documented in the global geochemical record of rhyolites, at which rhyolitic melts fluidize or stiffen and that clearly separates effusive from explosive deposits worldwide. A compositional tipping point governing the mobilization and eruption style of rhyolitic magma 2017-12-12T05:00:00Z The contemporaneous igneous rocks include olivine basalts, andesites, trachytes, rhyolites and tuffs, which are pierced by the microgranite of the Black Hill and by several vents filled with agglomerate, as near Swanston. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 10 "Echinoderma" to "Edward" 2011-01-19T03:00:19.027Z Lava streams, especially when they consist of rhyolite, dacite and some kinds of andesite, may rapidly solidify, and then become exceedingly brittle. Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 4 "Bradford, William" to "Brequigny, Louis" The whole of this consists of tuffs and lavas, andesites prevailing in the west and rhyolites and dacites in the east. Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 3 "Borgia, Lucrezia" to "Bradford, John" Trachytes, rhyolites, andesites and basalts occur, and a definite order of succession has been made out in several areas; but this order is not the same throughout the chain. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 4 "Carnegie Andrew" to "Casus Belli" We conclude that the composition of calcalkaline rhyolites is decisive in determining the mobilization and eruption dynamics of Earth’s largest volcanic systems, resulting in a better understanding of how the melt structure controls volcanic processes. A compositional tipping point governing the mobilization and eruption style of rhyolitic magma 2017-12-12T05:00:00Z The oldest volcanic rock appears to be rhyolite, which peers up in two small hills almost smothered beneath the lake deposits. Volcanoes: Past and Present The black lava patch, laid across the gray rhyolite flank of Shadow Mountain like the shade of an angry cloud, still frowned down upon the town like a portent of storms to come. Shadow Mountain Rocks vary considerably in the cementing properties of the dust, but usually the rocks classed as "trap," such as andesite, gabbro and rhyolite, and schist and basalt possess good cementing properties. American Rural Highways The domestic production has been small, consisting principally of flint pebbles from the California beaches, and artificial pebbles made from rhyolite in Nevada and quartzite in Iowa. The Economic Aspect of Geology Girard, G. & Stix, J. Magma recharge and crystal mush rejuvenation associated with early post-collapse Upper Basin Member rhyolites, Yellowstone caldera, Wyoming. A compositional tipping point governing the mobilization and eruption style of rhyolitic magma 2017-12-12T05:00:00Z These rocks approach towards true granites in one direction, and through quartz-porphyry and felsite to rhyolite in another—probably depending upon the conditions of cooling and consolidation. Volcanoes: Past and Present Maul from broken rubbing stone or grinder, grooved at each end; rhyolite. Illustrated Catalogue Of The Collections Obtained From The Indians Of New Mexico And Arizona In 1879 Second Annual Report of the Bureau of Ethnology to the Secretary of the Smithsonian Institution, 1880-81, Government Printing Office, Washington, 1883, pages 307-428 Granite is an acidic rock corresponding to rhyolite in chemical composition. The Elements of Geology It then cools quickly and forms finely crystalline rocks of the rhyolite and basalt types. The Economic Aspect of Geology The Chaitén rhyolite lava dome: eruption sequence, lava dome volumes, rapid effusion rates and source of the rhyolite magma. A compositional tipping point governing the mobilization and eruption style of rhyolitic magma 2017-12-12T05:00:00Z Fifty yards away and in full sight of the cabin, the mouth of a tunnel yawned blackly under a rhyolite ledge. The Trail of the White Mule |
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