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单词 surficial
例句 surficial
Deep and intense weathering of soils and mineral deposits exposed at the surface can result in the formation of surficial deposits. An Introduction to Geology 2017-01-01T00:00:00Z
“Based on the topography and characteristics of the bedrock and surficial material, any shallow groundwater encountered at the barn site is expected to be temporarily perched groundwater,” Jeremiah Jackson, a state geologist, wrote. Missouri residents worry pig farm will damage public land 2020-11-24T05:00:00Z
But we fear that the bipartisan reverence for our founding is actually pretty surficial these days. What will we make of our moment? 2019-10-24T04:00:00Z
And each cycle they deliver the kind of surficial change that temporarily gratifies the bloody-minded partisanship of one side but leaves most people with a deeper-still feeling of unease. Why civics education matters 2019-02-21T05:00:00Z
And yet, “superficial” is far more common than “surficial.” To find great leaders, get beyond the granite  2019-02-12T05:00:00Z
The desirable land within the limits of present time and the known surficial limits of the globe is obviously not convincing. The Critical Game 2012-01-05T03:00:38.527Z
Solar physicist Philip Scherrer, who is also based at Stanford, notes that theoretical models of how sunspots appear are relatively successful at describing surficial solar activity but much less true to reality at depth. Solar Blares: Listening to the Sun May Improve Space Weather Forecasts 2011-08-19T10:45:06.423Z
The phase of metamorphism dealing with surficial weathering, similar changes below the surface, and the formation of sediments, is called katamorphism or destructive change. The Economic Aspect of Geology
Mineral deposits of direct magmatic segregation are seldom much affected by surficial alteration, perhaps because of their coarse crystallization and their intermingling with resistant crystalline rocks. The Economic Aspect of Geology
Mineral deposits of the "igneous after-effect" type may be profoundly altered through surficial agencies. The Economic Aspect of Geology
On the whole, minerals of this mechanically deposited group are not greatly affected by later surficial alteration and concentration, because, having already been subjected to weathering, they are in a condition to resist such influences. The Economic Aspect of Geology
While segregation of materials is characteristic of the surficial products of weathering, the opposite tendency, of mixing and aggregation, is the rule under dynamic metamorphism, notwithstanding the minor segregation above noted. The Economic Aspect of Geology
The very use of the terms "secondary" and "primary" has suggested antithesis between surficial and deep ores. The Economic Aspect of Geology
The zinc oxide minerals in the surficial zone also are sometimes colored yellow by small amounts of greenockite. The Economic Aspect of Geology
One would not look for minerals known to be caused mainly by surficial processes in rocks which have been altered mainly by deep-seated processes. The Economic Aspect of Geology
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