Environmental Science for AP* (2nd Edition)

Published by W. H. Freeman
ISBN 10: 1464108684
ISBN 13: 978-1-46410-868-6

Chapter 12 - Module 35 - Fossil Fuel Resources - AP Review Questions - Page 417: 4



Work Step by Step

Because Bitumen a degraded type of petroleum that forms when a petroleum deposit is not capped with nonporous rock. The petroleum migrates close to the surface, where bacteria metabolize some of the light hydrocarbons while others evaporate. The remaining mixture no longer flows at ambient temperatures and pressures.
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