Cornbrash Formation
E934198
The Cornbrash Formation is a Middle Jurassic limestone and marl unit in England known for its rich marine fossil assemblages and use in regional stratigraphic correlation.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Cornbrash Formation canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T11591151 — 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: Cornbrash Formation Context triple: [Kellaways Formation, overlies, Cornbrash Formation]
-
A.
Curtis Formation
The Curtis Formation is a Middle Jurassic geologic unit in the western United States, characterized mainly by marine sandstones and siltstones that record shallow sea environments.
-
B.
Cloverly Formation
The Cloverly Formation is an Early Cretaceous geologic formation in the western United States known for its dinosaur fossils and fluvial sedimentary deposits.
-
C.
Calvert Formation
The Calvert Formation is a geologic formation along the Chesapeake Bay in Maryland, renowned for its Miocene-age marine sediments and abundant fossil beds exposed in the Calvert Cliffs.
-
D.
Carbondale Formation
The Carbondale Formation is a Pennsylvanian-age rock unit in the Illinois Basin renowned for its rich coal beds and exceptionally preserved fossil assemblages, including those of the Mazon Creek area.
-
E.
Lance Formation
Lance Formation is a Late Cretaceous geological formation in North America renowned for its rich dinosaur fossil beds, including specimens of Triceratops.
- 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: Cornbrash Formation Target entity description: The Cornbrash Formation is a Middle Jurassic limestone and marl unit in England known for its rich marine fossil assemblages and use in regional stratigraphic correlation.
-
A.
Curtis Formation
The Curtis Formation is a Middle Jurassic geologic unit in the western United States, characterized mainly by marine sandstones and siltstones that record shallow sea environments.
-
B.
Cloverly Formation
The Cloverly Formation is an Early Cretaceous geologic formation in the western United States known for its dinosaur fossils and fluvial sedimentary deposits.
-
C.
Calvert Formation
The Calvert Formation is a geologic formation along the Chesapeake Bay in Maryland, renowned for its Miocene-age marine sediments and abundant fossil beds exposed in the Calvert Cliffs.
-
D.
Carbondale Formation
The Carbondale Formation is a Pennsylvanian-age rock unit in the Illinois Basin renowned for its rich coal beds and exceptionally preserved fossil assemblages, including those of the Mazon Creek area.
-
E.
Lance Formation
Lance Formation is a Late Cretaceous geological formation in North America renowned for its rich dinosaur fossil beds, including specimens of Triceratops.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
geologic formation
ⓘ
lithostratigraphic unit ⓘ |
| age | Bathonian ⓘ |
| biostratigraphy | ammonite zonation ⓘ |
| contains |
oolitic limestone beds
ⓘ
shell debris ⓘ |
| country |
England
ⓘ
United Kingdom ⓘ |
| diagenesis | partly nodular ⓘ |
| economicUse |
aggregate
ⓘ
local building stone ⓘ |
| environmentOfDeposition | shallow marine ⓘ |
| exposedAt |
Cotswolds
ⓘ
Lincolnshire ⓘ Northamptonshire ⓘ |
| facies | bioclastic limestone ⓘ |
| fossilType |
ammonites
ⓘ
bivalves ⓘ brachiopods ⓘ echinoderms ⓘ |
| geologicPeriod | Middle Jurassic ⓘ |
| governingBody | British Geological Survey ⓘ |
| hasFossil |
Gryphaea
ⓘ
Rhynchonellid brachiopods ⓘ Terebratulid brachiopods ⓘ cardioceratid ammonites ⓘ |
| knownFor | rich marine fossil assemblages ⓘ |
| lithology |
limestone
ⓘ
marl ⓘ |
| mappedIn | British Geological Survey maps ⓘ |
| maximumThickness | about 10 metres ⓘ |
| memberOf | Great Oolite Group ⓘ |
| namedFor | cornbrash (local term for rubbly limestone used as soil conditioner) ⓘ |
| overlies | Kellaways Formation ⓘ |
| paleogeography | epicontinental sea ⓘ |
| partOf |
Jurassic System
ⓘ
linked to:
Jurassic Period
|
| primaryColor | brown ⓘ |
| region |
central England
ⓘ
southern England ⓘ |
| stratigraphicRank | formation ⓘ |
| stratigraphicUse | marker horizon in Middle Jurassic of England ⓘ |
| texture | rubbley limestone ⓘ |
| thickness | typically 3–8 metres ⓘ |
| underlies |
Oxford Clay Formation
ⓘ
linked to:
Oxford Clay
|
| usedFor | regional stratigraphic correlation ⓘ |
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: Cornbrash Formation Description of subject: The Cornbrash Formation is a Middle Jurassic limestone and marl unit in England known for its rich marine fossil assemblages and use in regional stratigraphic correlation.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.