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1. CompressionsThe compression is the most common method of fossilization.The compressions represent those fossils which contain maximumamount of organic carbon. The plant materials are flat on the field andtheir surface may be covered with a structure-less carbon. The cuti-nized epidermis may also been seen in the fossils. The compressionsare formed as a result of great vertical pressures.The compressions are formed when the entire plant or plant partsare buried beneath the sediments. Coal is believed to be a complexform of compressions

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A compression fossil is a fossil preserved in sedimentary rock that has undergone physical compression. While it is uncommon to find animals preserved as good compression fossils, it is very common to find plants preserved this way



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