CH2 young limestone 出现 aragonite old limestone 出现 calcite 1.How does an ion form from an uncharge atom? 释放电子或抓取电子 2.What allows one element substitute for another in the crystal lattice of a particular mineral? p.36 3.How does the orientation of a dike of igneous rock differ from orientation of a sill? dike 垂直地层 sill 平行地层 4.Under what circumstance does the eruption of lava produce a flood basalt instead of a volcano? 海里 5.Why do most sediment that form from weathering consist of silicate minerals? 矽酸盐类抗风化能力强且不溶於水 6.How does the origin of clay particles from igneous rock differ from the origin of grains of quartz sand from the same kinds of rock? clay 颗粒细 成分以云母质长石质为主 quartz sand 颗粒粗 成分以矽质为主 7.How does the process that turns clay into shale differ from the process that turns sand into sandstone? 不确定 8.Why do evaporite deposit weather quickly? 因其从水中沉淀,自然易於溶於水中 9.How does the following sedimentary structures form?[1]Graded beds. [2]Ripples. [3]Crossbedding. [4]Mudcracks. p.51 10.How does the origin of metamorphicrock differ from the origin of an igneous rock? 变质岩有再结晶现象或是出现叶理 11.Water plays a major role in the origin of sedimentary rocks. Use the Visual Overview on page 30 as a guide to explore the ways in which water serves as a medium for the production, transport, deposition, and lithification of the various kinds of mineral grains that form sediment. --

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