The general aspect or habit of a species, or group of species, esp. with reference to its adaptation to its environment.
A particular kind of sedimentary environment, e.g. black shale, shallow marine carbonate.
(1) Sedimentary: a group of rocks and primary structures indicative of a given depositional environment; (2) Metamorphic: a set of metamorphic mineral assemblages formed under a given range of pressures and temperatures.