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Chalk (PPO_130)

DGIF baseline 2026-1, the latest. Earlier baselines: timemap.

RDF: ppo_130.ttl

Name

chalk

Attribute

PPO Product

Definition

White soft earthy limestone consisting almost wholly of calcite and derived chiefly from microscopic salt water fossil shells and fragments.

Accepted

2013-10-18

Allowed for

• AA010 Extraction Mine

RWOI terms naming it

• RWO_00644 Chalk Mine

Source: DGIF 2026-1 QEA model, DGIWG. Standard: DGIWG 206-3. Licence: CC BY 4.0, © DGIWG.