lava
Enable an AI agent to recognise lava, assess its physical state and behaviour, and determine which observations, access decisions or interventions are justified by available evidence.
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.
Researched by: Codex + Grok
Purpose and description
Enable an AI agent to recognise lava, assess its physical state and behaviour, and determine which observations, access decisions or interventions are justified by available evidence.
Molten silicate rock that has erupted onto Earth's surface (or an analogous planetary surface) and is still molten or has cooled to form a coherent extrusive body; distinguished from magma by having left the vent.
It can be Identify and map a lava body while recording uncertain or concealed boundaries.; Compare successive observations to detect advance, inflation, drainage, crust disruption or cooling.; Estimate mobility and possible emplacement changes under explicit supply, terrain and material assumptions.; Select remote observations or specialist sampling that resolve a specific uncertainty.; Flag contact effects and affected locations for assessment by hazard and asset models.; Evaluate whether evidence and external operating rules support a proposed approach, crossing, sampling or engineered intervention..
Distinguishing features
Establish that the material reached the surface: a melt still confined below ground is magma rather than lava within this scope.
Establish geological melt provenance: heat, redness or fluidity alone cannot distinguish lava from industrial slag or another molten material.
Distinguish a coherent surface melt body from detached eruptive fragments or a particle-dominated current; record transitions and ambiguous mixed cases.
Distinguish ongoing emplacement from a stationary lava deposit using repeat observations of boundaries, supply or deformation rather than appearance alone.
Distinguish surface crust from complete solidification: a solid-looking exterior does not establish the state of the interior.
Scope
+ Identification and boundaries of a lava body, parcel, lobe, channel or lake
+ Temperature, composition, gas content, crystallinity and resulting flow behaviour
+ Supply, emplacement, movement, inflation and drainage
+ Crust formation, cooling and degree of solidification
+ Contact effects and evidence needed to constrain observation or intervention
- Subsurface magma reservoirs, ascent conduits and eruption initiation
- The volcano or volcanic plumbing system as a whole
- Detached airborne volcanic fragments and pyroclastic density currents
- Atmospheric transport of volcanic gases and aerosols
- Regional bedrock history and long-term weathering of solidified lava
- Emergency command, evacuation logistics and infrastructure asset management
Characteristics
- Source and emplacement context
- Linked vent or fissure, eruption episode, parent lava body and receiving surface; unknown permitted Connects the material to its origin and separates new supply from redistribution of existing lava.
- Composition
- Major-element mass percentages with analytical method, sample location and time Supports material identification and interpretation of melting, crystallisation and flow behaviour.
- Temperature distribution
- Degrees Celsius or kelvin, explicitly distinguishing exposed melt, crust and inferred interior A surface measurement cannot automatically represent the thermal state of the whole body.
- Physical phase proportions
- Melt, crystal and gas volume fractions with measurement or inference basis Constrains whether the material can deform or flow and how its behaviour may change.
- Effective rheology
- Effective viscosity in Pa·s and, where applicable, yield stress in Pa; include temperature and deformation conditions Supports conditional estimates of mobility without assuming a single constant viscosity.
- Body geometry
- Mapped footprint, thickness in m and volume in m³, with timestamp and uncertainty Defines what material is being assessed and the scale of emplacement or accumulation.
- Supply and discharge
- Volumetric rate in m³/s or mass rate in kg/s, with location, interval and measurement basis Distinguishes continuing input from a body that is draining or cooling without replenishment.
- Motion
- Front advance, internal surface velocity and vertical inflation or subsidence in m/s or m per observation interval Separates different kinds of movement that have different implications for exposure and flow routing.
- Emplacement form
- Channelised flow, sheet, lobe, pond or lake, dome, pillow-form body, mixed or unresolved Identifies the geometries and processes an agent must inspect rather than treating every lava body as an advancing open flow.
- Crust and interior condition
- Exposed melt, partial crust, continuous crust with unresolved interior, confirmed molten interior, substantially solidified or unresolved Prevents a visible crust from being treated as evidence of a cold or load-bearing body.
- Receiving environment
- Contact with terrain, liquid water, ice, sediment, vegetation or built assets Determines which contact processes and neighbouring models must inform a decision.
- Observation support
- Linked observations, samples and estimates with time, spatial coverage, method and uncertainty Makes state judgements traceable and exposes gaps caused by crust, cover or inaccessible interiors.
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: 6 bundles · 11 layers · 12 findings · 24 questions.
Lava identity and continuity Establishes what counts as the lava under assessment and how its identity persists through branching, crust formation and cooling.
An agent needs to distinguish the material from subsurface magma, eruptive fragments and unrelated melts before assessing its state.
Surface melt identification
Tests whether the candidate material belongs to this lava model.
Lava identification basis
Record the evidence for geological melt provenance and surface emplacement, including unresolved alternatives.
- What observation or sample establishes that this material is surface-emplaced geological melt or its directly tracked cooling product? definition
- Which vent, fissure or earlier lava body supplied it, and how was that connection established? provenance
Body boundaries and lineage
Defines the tracked unit within connected, branching or overlapping lava.
Tracked lava unit
Record whether the model instance represents a parcel, lobe, flow, lake or other bounded body and how it relates to adjacent units.
- Which observable or operational boundary separates this body from its supply, neighbouring lobes and older lava? boundary
- When this body branches, merges or solidifies, which identity and parent-child links should be retained? boundary
Thermal and material condition Captures the temperature and material properties that govern the body's capacity to flow and change state.
Lava appearance alone does not establish its interior temperature, phase proportions or resistance to deformation.
Thermal and phase state
Separates measured surface conditions from inferred interior conditions.
Temperature and phase evidence
Record where temperatures and melt, crystal or gas fractions were measured or inferred.
- What temperatures are supported for exposed melt, crust and interior, at what times and with what uncertainties? measurement
- What evidence constrains the proportions of melt, crystals and gas in the material being assessed? measurement
Composition and deformation
Relates sampled composition and material structure to observed or estimated flow resistance.
Rheological assessment
Record a conditional description of deformation behaviour with its compositional and observational basis.
- How representative is the analysed sample of the moving interior rather than only the cooled surface? provenance
- What viscosity or yield behaviour is supported, and under which temperature, crystal-content and deformation conditions? measurement
Supply and emplacement Tracks lava input, transport, accumulation and changes in occupied ground.
An advancing front, a filling pond and an inflating crusted lobe require different interpretations even when all receive lava.
Feeding and routing
Identifies how lava enters and moves through the tracked body.
Supply path and rate
Record active or suspected feeding connections, transport paths and changes in input.
- Is this body being replenished through an exposed channel, a concealed passage or another connection, and what supports that assessment? provenance
- What input or discharge rate is supported over the relevant interval, and how much of the transport remains unobserved? measurement
Advance and accumulation
Distinguishes lateral movement from thickening, inflation, ponding and drainage.
Emplacement change
Record changes in footprint, elevation and internal motion as separate observations.
- How have the front position, thickness and surface elevation changed between comparable observations? measurement
- Which terrain features, levees or obstructions currently constrain routing, and where is their continuity uncertain? boundary
- Which changes in supply or containment would require reassessing the expected area of emplacement? action
Crust and solidification Tracks the development of a solid exterior and the changing condition beneath it.
A stationary or crusted lava surface can conceal melt, ongoing transport or voids, so visible stillness cannot settle its state.
Surface-interior coupling
Assesses what the crust reveals and conceals about the underlying body.
Crust integrity and concealed state
Record crust continuity, openings and deformation together with evidence for underlying melt or cavities.
- Where is the crust intact, fractured, overturning or opening, and how recently was each condition observed? measurement
- What evidence distinguishes solid support from underlying melt, a drained passage or an unresolved interior? measurement
Cooling and model handoff
Defines how cooling is assessed and when a solidified product becomes the primary modelling subject.
Solidification assessment
Record the evidence for progress toward solidification without equating loss of visible glow or motion with completion.
- What observations constrain remaining interior heat and melt rather than only surface cooling? measurement
- Which evidence-based criterion permits a handoff to a volcanic-rock or deposit model while preserving lava provenance? boundary
Contact effects and action Connects lava condition and environmental contact to specific observation and intervention decisions.
What may be done near or to lava depends on concealed state, receiving materials and the evidence supporting the proposed action.
Environmental contact
Records interfaces where lava transfers heat, loads surfaces or interacts with water and other materials.
Contact process assessment
Identify observed and possible contact effects while separating lava-body observations from wider hazard predictions.
- Where does lava contact liquid water, ice, wet sediment, combustible material or built assets? boundary
- Which thermal, mechanical, gas-release or fragmentation effects are observed at those contacts, and which remain inferred? measurement
Decision evidence
Determines whether current knowledge supports a particular action involving the lava.
Action-specific evidence sufficiency
Tie each proposed action to current lava conditions, unresolved observations and applicable external operating requirements.
- For the proposed approach, crossing, sampling or intervention, which lava conditions must be established and which remain unknown? action
- Which remote observation or specialist measurement would most directly resolve the uncertainty controlling that decision? action
- What change in lava supply, crust condition or contact behaviour would invalidate the current action assessment? action
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Kinds and varieties
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- pāhoehoe
- ʻaʻā
- block lava
- pillow lava
- andesitic lava
- dacitic/rhyolitic lava
- komatiite (ultramafic lava)
- carbonatite lava
- Which of these kinds and varieties hold for the sense of lava this model covers, and on what evidence? provenance
Identifiers and schemes
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Wikidata - Q39586 - item lava
- Which of these identifiers and schemes hold for the sense of lava this model covers, and on what evidence? provenance
Sources
- Lava flows - Volcano Hazards Program - Definition as erupted molten rock, flow types, hazards, and typical temperatures.
- lava (Q39586) - Canonical identifier and aliases.
What the second pass must settle
- Does the registry intend lava to include fully solidified lava indefinitely, or should this model hand off to a rock or deposit entry after a defined transition?
- Should non-silicate lava and proposed cryolava share this entry, or do registry boundaries assign them to other material models?
- What identity rules should apply to lava lakes, connected tube-fed lobes and successive flows that merge or overlap?
- Which validated observation methods and uncertainty limits are appropriate for inferring interior melt, concealed transport and crust support in each emplacement setting?
- Which domain-specific sources and operating authorities should govern action criteria for terrestrial, submarine and extraterrestrial lava?