Scientists are planning an oily bitumen spill in this Ontario lake ...
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Bitumen and asphalt Pitch lake in Trinidad island, Trinidad and ...
Guanoco Lake (Bermudez Lake or Pitch Lake), Venezuela
The Pitch Lake is the largest natural deposit of asphalt in the ...
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The Black Diamond" : Lake Asphalt - Trinidad & Tobago [HD] - YouTube
Workers clean lake where bitumen emulsion has been seeping from ...
Nature's Time Capsules: A Guide to the World's Pitch Lakes - Atlas ...
The Pitch Lake is the largest natural deposit of asphalt in the ...
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