EVERYDAY SCIENCE

Detailed explanation-1: -Permineralization-minerals from sediment replace the organism’s tissues, leaving a replica of the original organism.

Detailed explanation-2: -Petrification occurs when the organic matter is completely replaced by minerals and the fossil is turned to stone. This generally occurs by filling the pores of the tissue, and inter and intra cellular spaces with minerals, then dissolving the organic matter and replacing it with minerals.

Detailed explanation-3: -Sometimes when an animal dies and its body decays, it can leave an imprint in the sediment. If this imprint fills in with minerals from sediment and groundwater, it can harden to form a fossil. This fossil is called a cast fossil.

Detailed explanation-4: -Permineralization is a type of fossilization that happens when minerals transported by water fill in all the open spaces of an organism or organic tissue.

Detailed explanation-5: -A specimen is buried in sediment after which its tissues dissolve and are replaced by dissolved minerals which precipitate (become solid). As these minerals precipitate, they do so preserving the mold that the dissolving organism had left. Sometimes the rock has the appearance of the organism.