Crude oil contains a mixture of gasoline, kerosene and heavy oils.
If crude oil is heated, the gasoline, which has the lowest boiling point, becomes a gas, which can then be drawn off and condensed into gasoline. If the mixture is heated further, kerosene gas can be drawn off and condensed. The heavy oils tht have the highest boiling point are drawn off last. No specimens of textiles from the time of hte Mayan civilization in Central America have survived the climate. The figures in the momuments that remain are often shown draped in garments with intricate woven patterns and with embroidered ornamentation.