(2)
In a gravel pit or quarry, bulldozers are used to scrape gravel
from the stream bed. A power shovel digs the gravel from the banks and loads it into trucks to be
dumped into a bin. Other trucks are loaded beneath the bin and transport the gravel elsewhere for
use (Figure 2-8).
Figure 2-8. Gravel Pit.
b.
In open pit mining (Figure 2-9) the following solids are
extracted:
Coal Clay
Bauxite
Copper
Peat
Chalk
Iron
Uranium
Chromium
Lignite
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