- The Earth -
The modified Mercalli scale ranks these 1-12: 1 - not felt except by few, 12 - total destruction
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We're in the holocene epoch of the quaternary period of the Cenozoic one of these
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Basalt is an igneous rock & rock salt is this type
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William Smith was the 1st to date rocks using these found within them
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The stratosphere includes this layer of the atmosphere that absorbs ultraviolet light
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