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Chp 11
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fossil
any preserved trace of an organism that lived long ago
wet, acidic soil- effect on fossilisation
minerals in bone dissolved and no fossilisation occurs
soil with no oxygen- effect on fossilisation
complete preservation of soft tissues and bones
alkaline soil- effect on fossilisation
minerals in bones not dissolved- produces best fossils
rapid burial effect
prevents decomposition and mechanical damage to fossil
location of fossil
often found near water bodies- buried by sediment so not destroyed by erosion
discovery of fossils
chance occurrence, uncovered by erosion