säilymismuotoja
Säilymismuotoja refers to the various ways in which living organisms or their traces are preserved over geological time. These forms are crucial for understanding the history of life on Earth and for reconstructing past environments. The most common and well-known type of säilymismuoto is fossilization, where organic material is replaced by minerals, or where the original structure is preserved in a mineralized form. This process typically occurs when an organism dies and is rapidly buried in sediment, preventing decomposition.
Other forms of säilymismuoto include casts and molds, which are impressions left by an organism in sediment