facies
Let an agent explain facies as a geological concept and its kinds, relay how facies are described and interpreted, and separate the concept from unrelated aliases in the registry entry such as chemical compound categories.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain facies as a geological concept and its kinds, relay how facies are described and interpreted, and separate the concept from unrelated aliases in the registry entry such as chemical compound categories.
In geology, a body of rock or sediment with characteristics that reflect the conditions under which it formed, distinguished from adjacent bodies by lithology, fossils, structures or mineral assemblages; sedimentary facies record depositional environments, metamorphic facies such as greenschist record pressure and temperature, and ichnofacies record trace fossil associations, and the concept is central to stratigraphy and basin analysis.
What it is for: Interpreting the origin of rocks and sediments.
It can be explain the concept and kinds; relay description and interpretation methods; relay classification schemes; separate unrelated aliases.
Distinguishing features
Environmental interpretation
Lateral and vertical relations
Multiple kinds
Basis of stratigraphic models
What it looks like
Rock bodies distinguished in outcrop or core by colour, grain size, structures or minerals.
How it is recognised
Rock body reflecting formation conditions
Sedimentary, metamorphic and ichnofacies
A formation is a mappable unit; a lithology is a rock type; facies is interpretive
Related models
is a kind of - in registry terms
is interpreted by - and petrology
is related to - what sedimentary facies record
is related to - what metamorphic facies record
In practice
Families and kinds
sedimentary facies and facies associations
metamorphic facies such as greenschist, amphibolite and eclogite
ichnofacies
biofacies and microfacies
seismic facies
culm facies as a historical regional term
Standards and regulation
Stratigraphic codes and guides
IUGS recommendations on metamorphic facies nomenclature
Failure modes and hazards
Confusing facies with formations or lithologies
Inconsistent facies schemes
Sense confusion with unrelated aliases
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Concept What facies means.
Definition.
Definition
Definition and kinds.
Definition
Definition.
- What is a facies, and what kinds are distinguished? definition
- Is the question about geological facies or an unrelated sense? boundary
Distinctions
Facies, formation, lithology.
Distinctions
Distinctions.
- How does facies differ from formation, lithology and member? definition
- Which entry fits the specific kind? action
Practice Description and interpretation.
Practice.
Describe
Describing facies.
Describe
Describe.
- How are facies described in outcrop and core, and how are facies associations built? action
- What facies apply to the section in question? measurement
Interpret
Interpreting environments.
Interpret
Interpret.
- How are facies interpreted as depositional environments, following principles such as Walther law? provenance
- Which references are standard? provenance
Kinds Metamorphic and trace fossil facies.
Science.
Metamorphic
Metamorphic facies.
Metamorphic
Metamorphic.
- What are the metamorphic facies, and what pressures and temperatures do they record? provenance
- Which entry fits metamorphic facies? action
Ichno
Ichnofacies.
Ichno
Ichno.
- What are ichnofacies, and what do trace fossil associations reveal? provenance
- Which entry fits ichnology? action
Context Applications and history.
Context.
Applications
Applications.
Applications
Applications.
- How are facies models used in petroleum, groundwater and basin analysis? provenance
- Which entry fits basin analysis? action
History
History.
History
History.
- How did the facies concept develop from Gressly in 1838? provenance
- Which sources are cited? provenance
What the second pass must settle
- Should metamorphic facies and ichnofacies be separate entries?
- How should stratigraphic guides be linked?
- The registry entry has merged aliases for chemical compound categories; should they be removed?