There are many kinds of fossils, which are durable, hard to destroy or shell, but in some conditions may keep body to remain, such as the Siberian mammoth elephant suite.The changes come as the creatures from fossils, then. Born in various ways, by when the creatures die. The various parts of the organism is gradually being changed. Cavity gaps or holes. Various structures, there may be minerals crystallize into the cause. Call this movement in that petrified (petrification) or tissue cell walls and other solid parts have been replaced with minerals by the insurgents instead of (replacement)The creatures or shell by sedimentary layers buried When it is melting away with the groundwater would pose as the imprint is on the floor sediment, which called these welded type (mold) If this gap is to crystallize into the fossil in a manner which will be called the cast (cast)Increasing the carbon (carbonization) is always to preserve the fossil genera the leaves or small animals in sediment texture and closed slash wrecked creatures. Over time, the pressure increases. Make the component liquids and gas were to rest, but a thin film of carbon thin films that are missing. Remaining traces in sediment layer texture is called impression.Small creatures, delicate like bugs Preservation to become fossils Usually, difficult. The appropriate method. For these creatures, it is stored in rubber wood, resin, this will prevent these creatures from destruction by nature.In addition to the above all Trace fossils may also be caused by organisms such as traces the life of welded seams at the foot of a creeping in the sediment and becomes a rock in the later period, or may have a cavity (burrows) in the sediment layers in the wood or in the rock caused by living organisms, and have a mineral to crystallize on these channels, animal manure or food debris present in the stomach (coprolites) is a fossil that is useful to indicate the animal's eating habits might be the stones (gastroliths) to eat animals to aid in digestion, and can be an example.
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