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Related to facies: metamorphic facies, masked facies


 (fā′shē-ēz′, -shēz)
n. pl. facies
1. Biology The general aspect or outward appearance, as of a given growth of flora.
2. Medicine The appearance or expression of the face, especially when typical of a certain disorder or disease.
3. Geology A rock or stratified body distinguished from others by its appearance or composition.

[Latin faciēs; see dhē- in Indo-European roots.]


n, pl -cies
1. (Biology) the general form and appearance of an individual or a group of plants or animals
2. (Geological Science) the characteristics of a rock or series of rocks reflecting their appearance, composition, and conditions of formation
3. (Medicine) med the general facial expression of a patient, esp when typical of a specific disease or disorder. See Hippocratic facies
[C17: from Latin: appearance, face]


(ˈfeɪ ʃiˌiz, -ʃiz)

n., pl. fa•ci•es.
1. general appearance, as of an animal or vegetable group.
2. the appearance and characteristics of a rock formation, esp. as differentiated from contiguous deposits.
3. a facial expression characteristic of a pathological condition.
4. a distinctive phase of a prehistoric cultural tradition.
[1680–1690; < Latin: form, figure, appearance, face, akin to facere to make]


Features of the appearance or composition of a rock representing a local environment.
References in classic literature ?
Linnaeus said long ago, "Nescio quae facies laeta, glabra plantis Americanis" (I know not what there is of joyous and smooth in the aspect of American plants); and I think that in this country there are no, or at most very few, Africanae bestiae, African beasts, as the Romans called them, and that in this respect also it is peculiarly fitted for the habitation of man.
It has often been associated with certain water depth and facies conditions (Osgood & Szmuc 1972).
The project will extend the interpretation to include gross depositional environment mapping, seismic facies analysis and play fairway analysis over time.
Herein, we provide the justification and description of this unit (Appendix 1), a detailed measured section (Appendix 2), map of the coastal outcrop, facies descriptions and interpretations that we hope will serve as a foundation for future studies of this world-class exposure.
Paleostructure controlled the development of basins and distribution of sedimentary facies, which further influenced the depocenter of oil shale and the center of the prolific zone.
Seismic stratigraphy and depositional facies models.
The Arquia Group is formed by garnet amphibolites, greenschists and mica schists, from basic, volcano-sedimentary and pelitic protoliths, respectively, metamorphosed under greenschist and amphibolite facies conditions (Restrepo & Toussaint, 1976; Arias & Caballero, 1978; Sanchez, 1988; Rios Reyes, et al.
The JIP will focus on the following key issues: relationships between facies, depositional sequences and reservoir quality; shale pore types and their effect on total porosity and permeability; porosity-permeability trends for individual Utica and Point Pleasant facies; relative permeability and capillary pressure behavior; and linking core-derived reservoir quality to well logs and well productivity.
The results of this examination revealed presence of the following four facies types: the ophiolite clasts conglomerate, ophiolite brecciated conglomerate facies, calclithite facies and lithic carbonate facies.
SeisEarth[R] and VoxelGeo[R] allowed us to rapidly interrogate multiple, large 3D seismic and attribute volumes to predict reservoir and seal facies as well as potential areal net-to-gross variation.