The containers carry the asphalt to a... |
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The digger can only drive on the surface... |
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This is the largest deposit of asphalt in... |
Asphalt is a sticky, black, semi-solid... |
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Water is pumped out of this lake, known... |
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Pitch Lake is on the southwest peninsula... |
As the water is pumped out of the lake... |
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The lake surface hardens overnight and... |
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Asphalt mining started here in the mid... |
