sand
Let an agent explain sand, relay classification, types, formation, uses, extraction impacts and health hazards from geology, UNEP and occupational health sources with debates attributed, describe the named types and flag unverified aliases, and distinguish sand from silt, gravel, soil and quicksand as a condition.
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 sand, relay classification, types, formation, uses, extraction impacts and health hazards from geology, UNEP and occupational health sources with debates attributed, describe the named types and flag unverified aliases, and distinguish sand from silt, gravel, soil and quicksand as a condition.
A granular material of rock and mineral particles between about 0.0625 and 2 millimetres in diameter, most commonly quartz sand from weathered silicate rocks, with other types such as coral and shell sands, black volcanic sands and heavy mineral monazite sands rich in thorium and rare earths, and flying or blowing sand moved by wind; oil sands are sand and clay deposits containing bitumen, as in Alberta. Sand is one of the most extracted materials on Earth for concrete, glass and land reclamation, and UNEP has warned of unsustainable sand extraction. Crystalline silica dust from cutting sand-based materials can cause silicosis, and the registry aliases Grovmo and Aqu-aqu could not be verified.
What it is for: Construction, glassmaking, industry and landscapes.
It can be explain grain size and types; relay uses and extraction impacts; describe named types; relay silica dust hazards.
Distinguishing features
Grain size definition
Quartz dominance
Heavy global extraction
Silica dust hazard
What it looks like
Loose grains in colours from white and golden to black, pink or green, forming beaches, dunes and riverbeds.
Physical character
grain size: 0.0625-2 mm - Wentworth scale
global sand and gravel use: about 50 billion tonnes a year note - UNEP estimate, check current
main mineral: quartz note
How it is recognised
Granular sediment of 0.0625-2 mm particles
Oil sands, Grovmo, monazite sands, quartz sand, flying sand, Aqu-aqu
Silt is finer; gravel is coarser; soil contains organic matter; quicksand is saturated sand that loses strength
Related models
is a kind of - in registry terms
is used in -
can cause - as crystalline silica dust
is contrasted with -
In practice
Families and kinds
quartz sand
carbonate sands
volcanic sands
heavy mineral sands
aeolian or flying sand
oil sands
Standards and regulation
Occupational exposure limits for respirable crystalline silica
Sand mining permits and river protection laws
Radiation rules for monazite handling
Failure modes and hazards
Silicosis from dust
Illegal sand mining damage
Beach sand hole collapses
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 sand is.
Science.
Definition
Definition.
Definition
Definition.
- Is someone trapped in collapsed sand or a deep beach hole, in which case call emergency services and do not dig in a way that causes further collapse? boundary
- What is sand, and how does it differ from silt, gravel, soil and quicksand? definition
Types
Named types.
Types
Types.
- What are quartz, monazite, flying and oil sands, and what might Grovmo and Aqu-aqu refer to? definition
- Which entry fits the specific type? action
Geology Geology.
Science.
Formation
Formation.
Formation
Formation.
- How does weathering produce sand, and why is quartz so common? provenance
- Which references are standard? provenance
Dunes
Wind-blown sand.
Dunes
Dunes.
- How does wind move sand to form dunes? provenance
- Which sources are cited? provenance
Resources Use and extraction.
Attribution.
Extraction
Sand extraction.
Extraction
Extraction.
- What does UNEP report about sand extraction impacts on rivers and coasts, with figures attributed? provenance
- Is the information current? boundary
Uses
Uses.
Uses
Uses.
- Why is desert sand often unsuitable for concrete? provenance
- Which entry fits construction aggregate? action
Context Health and energy.
Regulation.
Silica
Silica dust.
Silica
Silica.
- How do exposure limits protect workers from crystalline silica? provenance
- Which entry fits silicosis? action
Oil sands
Oil sands debate.
Oil sands
Oil sands.
- What do industry, governments and environmental groups argue about oil sands, with positions attributed? provenance
- Is the presentation neutral and attributed? boundary
What the second pass must settle
- The registry aliases Grovmo and Aqu-aqu could not be verified and should be reviewed
- Should oil sands be moved to petroleum entries?
- How should UNEP sand reports be linked?