| 单词 | wall rock |
| 例句 | “They were pioneering techniques that didn’t exist at the time. They were kind of inventing the sport of big wall rock climbing,“ said Daniel Duane, author of “El Capitan: Historic Feats and Radical Routes.” George Whitmore, legendary climber of El Capitan, dies at 89 2021-01-04T05:00:00Z "The passengers are solid chunks of wall rocks that carry a wealth of details on conditions far beneath the surface of our planet over time." Diamond samples reveal size of lost continent 2020-03-21T04:00:00Z All I could make out was the endless ramp, the wall rock, thick cables bolted to the granite, looping on ahead until they disappeared where the headlights lost themselves in the dark air. A Journey Into World's Deepest Gold Mine 2013-12-13T19:10:17Z I could soon talk glibly of "blossom rock," "pay streaks," "cap rock," "wall rock," "rich color," and use the common terms of miners. A Gold Hunter's Experience They also replace the wall rocks; limestone is especially susceptible. The Economic Aspect of Geology In mines where the range of values is narrower than the normal stoping width, some wall rock must be broken. Principles of Mining Valuation, Organization and Administration Sucking up river between the wall rocks on either side, its force was terrific. The River and I Their principal occurrence is in distinct fissure veins in igneous rocks, with more or less replacement of the wall rock. The Economic Aspect of Geology The wall rocks are usually strongly altered and in part are replaced by some of the above minerals, forming coarse-grained rocks which are called "greisen." The Economic Aspect of Geology In igneous rock the ore-bearing solutions may have altered the wall rock to a dense mixture of quartz, sericite, and chlorite. The Economic Aspect of Geology The association with minerals containing fluorine and boron, and the intense alteration of the wall rocks, indicate that the temperature must have been very high. The Economic Aspect of Geology The buck would be obliged to land above the wall rocks, and the drifting boat would keep him going. The River and I The ore fills fissures to some extent, but is mainly a replacement of the wall rock. The Economic Aspect of Geology Association with typical hot-water minerals and hydrothermal alterations of the wall rock are again believed to indicate the origin of the ores through ascending hot solutions from a deep source. The Economic Aspect of Geology Some of the graphite also occurs in pegmatite intrusives and adjacent wall rocks. The Economic Aspect of Geology We rounded a bend where the wall rocks sloped back, leaving a narrow arid sagebrush strip along both sides of the stream. The River and I Once again the wall rocks closed about us. The River and I I felt something of that boy's ache as we shot in among the wall rocks again. The River and I |
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