#autigen
- Authigenic — Said of minerals or sedimentary components that formed directly in situ, within the sediment or host rock, through processes of chemical precipitation, recrystallization, or diagenetic transformation, rather than being transported from elsewhere as pre-existing detrital material.
- Authigenesis — The geological process of in situ formation of new minerals within a sedimentary rock or sediment, during diagenesis or epigenesis, through chemical reactions, precipitation, or fluid interactions, without input of transported material.