cirque
Let an agent explain cirques and how they form, relay glacial processes and examples from geomorphology sources, describe cirque stairways and tarns, and distinguish cirques from U-shaped valleys, calderas, sinkholes and the cirque as a theatre or circus sense.
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 cirques and how they form, relay glacial processes and examples from geomorphology sources, describe cirque stairways and tarns, and distinguish cirques from U-shaped valleys, calderas, sinkholes and the cirque as a theatre or circus sense.
An amphitheatre-like hollow with steep headwalls carved into a mountainside by glacial erosion at the head of a glacier, often holding a small lake or tarn after the ice melts, known as a corrie in Scotland and cwm in Wales, and forming sequences called cirque stairways where several cirques step down a valley; cirques mark past glaciation and are found in mountain ranges worldwide.
What it is for: Not applicable; a landform.
It can be explain formation; relay examples; describe related features; distinguish related landforms.
Distinguishing features
Glacial origin
Steep headwall
Often holds a tarn
Marks past glaciation
What it looks like
A bowl-shaped basin with steep back walls high on a mountain.
Physical character
typical width: hundreds of metres to a few kilometres note
formation processes: plucking, abrasion, freeze-thaw list
Cirque de Gavarnie: Pyrenees note - famous example
How it is recognised
Glacially carved mountain hollow
Glacial cirque, corrie, cwm, cirque stairway, tarn
U-shaped valleys are glacial troughs; calderas are volcanic; sinkholes are karst; cirques in French also mean circuses
Related models
is a kind of - in geomorphology
is classed under - in registry terms, arguably a related landform
may contain -
is formed by -
In practice
Families and kinds
simple cirques
compound cirques
cirque stairways
cirques with tarns
regional names such as corrie and cwm
Standards and regulation
Protected area and geoheritage designations
Failure modes and hazards
Rockfall hazards
Confusing cirques with other basins
Registry parent U-shaped valley misfiled
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.
Understand What a cirque is.
Science.
Definition
Definition.
Definition
Definition.
- What is a cirque, and how does it differ from a U-shaped valley, caldera and sinkhole? definition
- Is the question about geomorphology, a specific place or hiking safety? boundary
Features
Features.
Features
Features.
- What are tarns, headwalls, cirque stairways, corries and cwms? definition
- Which entry fits the specific feature? action
Science Formation.
Science.
Processes
Processes.
Processes
Processes.
- How do glaciers carve cirques by plucking and abrasion? provenance
- Which references are standard? provenance
Climate
Palaeoclimate.
Climate
Climate.
- How do cirque altitudes record past snowlines and climate? provenance
- Which sources are cited? provenance
Places Examples.
Application.
Examples
Examples.
Examples
Examples.
- What are famous cirques such as Gavarnie and Scottish corries? provenance
- Which entry fits Cirque de Gavarnie? action
Safety
Mountain safety.
Safety
Safety.
- What hazards do mountain agencies note for cirque terrain? provenance
- Which entry fits mountain safety? action
Context Names.
Context.
Names
Regional names.
Names
Names.
- Why are cirques called corries and cwms in Scotland and Wales? provenance
- Which entry fits glacial landform? action
Planets
Other planets.
Planets
Planets.
- Are cirque-like landforms found on Mars? provenance
- Which entry fits glaciers on Mars? action
What the second pass must settle
- Should cirque stairway be a separate entry?
- How should geomorphology sources be linked?
- The registry parent U-shaped valley is a related landform rather than a parent; should it be reviewed?