Lower Greensand Group
E503032
The Lower Greensand Group is a Lower Cretaceous sedimentary rock formation in southern England, notable for its sandstones, ironstones, and building stones such as Kentish ragstone.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Lower Greensand Group canonical | 6 |
How this entity was disambiguated
This entity first appeared as the object of triple T5222617 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Lower Greensand Group Context triple: [Kentish ragstone, partOf, Lower Greensand Group]
-
A.
Sherwood Sandstone Group
The Sherwood Sandstone Group is a major Triassic sandstone rock sequence in the UK, notable as an important aquifer and hydrocarbon reservoir across several sedimentary basins.
-
B.
Mercia Mudstone Group
The Mercia Mudstone Group is a thick sequence of predominantly red mudstones and siltstones of Triassic age widely distributed across parts of the UK, forming an important component of its subsurface geology.
-
C.
Oxford Clay
Oxford Clay is a Jurassic-age marine sedimentary rock formation in England renowned for its exceptionally well-preserved fossils, especially marine reptiles and invertebrates.
-
D.
Suffolk Sandlings
Suffolk Sandlings is a distinctive lowland heath and coastal landscape in eastern England, known for its sandy soils, rare wildlife habitats, and conservation importance.
-
E.
London Clay Formation
The London Clay Formation is an early Eocene marine clay deposit in southeast England, renowned for its rich fossil content and its importance in shaping the geology and engineering properties of the London area.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Lower Greensand Group Target entity description: The Lower Greensand Group is a Lower Cretaceous sedimentary rock formation in southern England, notable for its sandstones, ironstones, and building stones such as Kentish ragstone.
-
A.
Sherwood Sandstone Group
The Sherwood Sandstone Group is a major Triassic sandstone rock sequence in the UK, notable as an important aquifer and hydrocarbon reservoir across several sedimentary basins.
-
B.
Mercia Mudstone Group
The Mercia Mudstone Group is a thick sequence of predominantly red mudstones and siltstones of Triassic age widely distributed across parts of the UK, forming an important component of its subsurface geology.
-
C.
Oxford Clay
Oxford Clay is a Jurassic-age marine sedimentary rock formation in England renowned for its exceptionally well-preserved fossils, especially marine reptiles and invertebrates.
-
D.
Suffolk Sandlings
Suffolk Sandlings is a distinctive lowland heath and coastal landscape in eastern England, known for its sandy soils, rare wildlife habitats, and conservation importance.
-
E.
London Clay Formation
The London Clay Formation is an early Eocene marine clay deposit in southeast England, renowned for its rich fossil content and its importance in shaping the geology and engineering properties of the London area.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf | geologic group ⓘ |
| age |
Aptian
ⓘ
Barremian ⓘ |
| contains |
Kentish ragstone
ⓘ
building stone quarries ⓘ |
| country | England ⓘ |
| depositionalEnvironment |
deltaic
ⓘ
nearshore ⓘ shallow marine ⓘ |
| fossilContent |
ammonites
ⓘ
bivalves ⓘ marine invertebrates ⓘ |
| geologicalSurveyCode | LGS ⓘ |
| geologicPeriod | Lower Cretaceous ⓘ |
| hasColor | greenish ⓘ |
| hasEconomicImportance |
construction industry
ⓘ
local architecture ⓘ |
| hasMember |
Atherfield Clay Formation
ⓘ
Folkestone Formation ⓘ Hythe Formation ⓘ Sandgate Formation ⓘ |
| lithology |
conglomerate
ⓘ
ironstone ⓘ mudstone ⓘ sandstone ⓘ siltstone ⓘ |
| mineralContent | glauconite ⓘ |
| namedFor | greensand lithology ⓘ |
| notableFor |
building stone production
ⓘ
ironstone resources ⓘ |
| notableLocalStone | Kentish ragstone ⓘ |
| outcropsIn |
Hampshire
ⓘ
Isle of Wight ⓘ Kent ⓘ Surrey ⓘ Sussex ⓘ |
| overlies | Wealden Group ⓘ |
| partOf |
British Cretaceous stratigraphy
ⓘ
Cretaceous System in England ⓘ
linked to:
Wessex Formation
|
| region | southern England ⓘ |
| stratigraphicUnit | Wealden Basin succession ⓘ |
| thickness | up to several hundred metres ⓘ |
| underlies | Gault Formation ⓘ |
| usedAs |
aggregate source
ⓘ
building stone source ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Lower Greensand Group Description of subject: The Lower Greensand Group is a Lower Cretaceous sedimentary rock formation in southern England, notable for its sandstones, ironstones, and building stones such as Kentish ragstone.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.