The environment of the genesis of a rock may also be called facies.
It is the past environment that typically differs significantly from the
deposit, i.e. the environment (stratum) where it was found nowadays.

The properties of the facies / environment of rock genesis usually can only be inferred from the rock or other material with varying certainty.


This class holds terms to describe the S96 Environment of Rock Genesis.


Material components of rocks, like remnants of corals, pisoids, vacuols, erosion etc.


Components that are of biological origin, like coral skeletons, molluscs, foraminifera.


Facies is the past environment in which the fossil or rock sedimented. It is not the same as the deposit and typically exhibits (or rather, exhibited) other properties.


This class resembles stratigraphic periods that are / can be defined on a global scale.
It is recommended to use the terms and periods defined by the international stratigraphic chart.


Local stratigraphic periods are periods that are not defined globally but only with a local extend.
From a hierarchical view, they are typically below the periods defined globally in the International Stratigraphic Chart.