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Gemstones are commonly found in pegmatites, which are igneous rocks that are a. exceptionally mafic b. exceptionally coarse grained c. exceptionally fine grained d. extrusive, forming from lava
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Geography, 23.06.2019 19:00
Why is the huronian supergroup rock formation particularly interesting to scientists? because it looks like a cross-section of a giant, stone encyclopedia because it formed during the period when oxygen began to accumulate in the atmosphere because it contains unusually large amounts of oxygen and sulfur because it dramatically altered the planet's development when it first formed
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Geography, 24.06.2019 02:00
What are mountains that divide european russia from asian russia?
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What are the impacts on the lithosphere because of agriculture?...
Mathematics, 10.03.2020 19:11
Mathematics, 10.03.2020 19:11
Mathematics, 10.03.2020 19:11
Mathematics, 10.03.2020 19:11