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What type of unconformity occurs when older metamorphic or igneous rocks are overlain by younger sedimentary strata?
What type of unconformity occurs when older metamorphic or igneous rocks are overlain by younger sedimentary strata?
What is the term for a broken, caved-in, mined out portion of the deposits?
What is the term for a broken, caved-in, mined out portion of the deposits?
What is the term for the rising of the floor of the mine caused by its being too soft to resist the weight on the pillar?
What is the term for the rising of the floor of the mine caused by its being too soft to resist the weight on the pillar?
What is the name of the siliceous deposit of a sedimentary nature whose main constituent is redistributed silica?
What is the name of the siliceous deposit of a sedimentary nature whose main constituent is redistributed silica?
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What is the term for the sides of a fold?
What is the term for the sides of a fold?
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What is the term for the boundary between the mantle and outer core?
What is the term for the boundary between the mantle and outer core?
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What type of rock is andesite?
What type of rock is andesite?
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What is the best raw material for the production of rock aggregates for construction material?
What is the best raw material for the production of rock aggregates for construction material?
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What is the term for the process of blocks of the earth's crust resting on the mantle?
What is the term for the process of blocks of the earth's crust resting on the mantle?
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What is the term for a slow deformation under small stresses acting over a long period of time?
What is the term for a slow deformation under small stresses acting over a long period of time?
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What is the term for a liquid, very viscous hydrocarbon not extractable from oil wells?
What is the term for a liquid, very viscous hydrocarbon not extractable from oil wells?
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What is a square set whose members are not framed at their intersections and the timbers used are smaller than those of the square set?
What is a square set whose members are not framed at their intersections and the timbers used are smaller than those of the square set?
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