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Card 16

Front

rocks changed by intense heat + pressure, but without fully melting

Back

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Card 17

Front

a body of rock that contains minerals that can be exploited

Back

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Card 18

Front

the unwanted material on top of the mineral deposit to be exploited

Back

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Card 19

Front

the basic unit of soil structure where particles of sand, silt, clay and humus form aggregates

Back

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Card 20

Front

deposits of dense minerals carried by water e.g. tin + gold

Back

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Card 21

Front

the solid rock particles left after weathering

Back

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Card 22

Front

the proportion of a resource that can be economically exploited with existing technology

Back

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Card 23

Front

the general name for a storage location of any material

Back

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Card 24

Front

the average length of time that a molecule remains in a reservoir

Back

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Card 25

Front

all the material that is theoretically available for exploitation

Back

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