Bitumen
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Bitumen is an immensely viscous constituent of petroleum. Depending on its exact composition, it can be a sticky, black liquid or an apparently solid mass that behaves as a liquid over very large time
Natural bitumen from the Dead Sea
Refined bitumen
The University of Queensland pitch drop experiment, demonstrating the viscosity of bitumen
Bituminous outcrop of the Puy de la Poix, Clermont-Ferrand, France
Pitch Lake
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The Pitch Lake is the largest natural deposit of bitumen in the world, estimated to contain 10 million tons. It is located in Trinidad and Tobago, more specifically in La Brea in southwest Trinidad, w
Bitumen
…the Ancient Greek word ἄσφαλτος (ásphaltos), which referred to natural bitumen or pitch. The largest natural deposit of bitumen in the world is the Pitch Lake of southwest Trinidad, which is estimated to contain 10 million tons. About 70% of annual bitumen production is destined for road construction, its…
Pitch Lake, 2016
Pitch Lake, c. 1890