metamorphic rock
Let an agent handle metamorphic rocks by type, formation, identification, occurrence and uses, and link to building stone and heritage.
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 handle metamorphic rocks by type, formation, identification, occurrence and uses, and link to building stone and heritage.
Rock formed when existing rock is transformed by heat, pressure or chemically active fluids without melting, developing new minerals and textures such as foliation; examples include slate, schist, gneiss, marble and quartzite, and regional names such as Verrucano or Sioux Quartzite denote specific formations.
What it is for: Geology, construction materials and landscape understanding.
It can be identify metamorphic rock types; explain metamorphic grade and facies; find occurrences and quarries; understand uses as building stone.
Distinguishing features
Formed from existing rock
No melting
New minerals and textures
Grade reflects conditions
What it looks like
Rocks with foliation, banding or recrystallised textures, such as layered gneiss or sparkling marble.
How it is recognised
Foliation and banding
Recrystallised minerals
Sedimentary rocks show bedding and fossils
Related models
is a kind of - category
is formed by - process
is related to - process
contains - minerals
In practice
Families and kinds
foliated rocks such as slate, schist and gneiss
non-foliated rocks such as marble and quartzite
contact metamorphic rocks
high-pressure rocks such as eclogite
named regional formations
Standards and regulation
IUGS rock classification
Building stone standards such as EN 12440
Failure modes and hazards
Misidentifying rocks
Silica dust when cutting quartzite
Asbestos-bearing rocks such as some serpentinites
Also called
+61
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.
Identify Which rock.
Texture identifies.
Type
Rock type.
Type
Rock type.
- What metamorphic rock is this, based on texture and minerals? definition
- What was its parent rock? definition
Grade
Metamorphic grade.
Grade
Grade.
- What grade or facies does the mineral assemblage indicate? definition
- What conditions does that imply? measurement
Formation How it formed.
Conditions transform rock.
Process
Metamorphism.
Process
Metamorphism.
- Was this rock formed by regional, contact or dynamic metamorphism? definition
- What tectonic setting produced it? provenance
Formations
Named formations.
Formations
Named formations.
- What is this named formation, and where does it occur, according to geological surveys? provenance
- How old is it? measurement
Uses Applications.
Rocks serve industry.
Stone
Building stone.
Stone
Building stone.
- How are marble, slate and quartzite used in building? provenance
- Which standards apply? provenance
Safety
Hazards.
Safety
Hazards.
- Does cutting this rock release silica dust, or could it contain asbestos minerals? boundary
- Which controls apply? provenance
Learning Field and class.
Rocks teach geology.
Field
Field sites.
Field
Field sites.
- Where can this rock be seen in the field? provenance
- Is collecting permitted? provenance
Teach
Teaching.
Teach
Teaching.
- How can the rock cycle be taught with metamorphic examples? action
- Which specimens help? action
What the second pass must settle
- Should rock types be separate entries?
- How should geological maps be linked?
- How should named formations be linked?