Carbondale Formation
E874068
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.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Carbondale Formation canonical | 2 |
| Mazon Creek depositional basin | 1 |
| Pennsylvanian system | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10601352 — 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: Carbondale Formation Context triple: [Mazon River, geologicalGroupAssociated, Carbondale Formation]
-
A.
Boone Formation
The Boone Formation is a Mississippian-age carbonate rock unit of cherty limestones and dolomites widely exposed across parts of the Ozark region in the central United States.
-
B.
Claron Formation
The Claron Formation is a geologic rock unit of colorful limestones and mudstones best known for forming the striking hoodoos and cliffs of Bryce Canyon and other parts of the Paunsaugunt Plateau in southern Utah.
-
C.
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.
-
D.
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.
-
E.
Carmel Formation
The Carmel Formation is a Middle Jurassic geologic unit of the western United States, characterized by marine and marginal-marine sediments that record a transition from desert dune environments to shallow seas.
- 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: Carbondale Formation Target entity description: 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.
-
A.
Boone Formation
The Boone Formation is a Mississippian-age carbonate rock unit of cherty limestones and dolomites widely exposed across parts of the Ozark region in the central United States.
-
B.
Claron Formation
The Claron Formation is a geologic rock unit of colorful limestones and mudstones best known for forming the striking hoodoos and cliffs of Bryce Canyon and other parts of the Paunsaugunt Plateau in southern Utah.
-
C.
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.
-
D.
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.
-
E.
Carmel Formation
The Carmel Formation is a Middle Jurassic geologic unit of the western United States, characterized by marine and marginal-marine sediments that record a transition from desert dune environments to shallow seas.
- F. None of above. chosen
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf |
geologic formation
ⓘ
stratigraphic unit ⓘ |
| chronostratigraphicUnit | Middle Pennsylvanian ⓘ |
| contains |
Mazon Creek Lagerstätte
ⓘ
linked to:
Mazon Creek fossil beds
coal beds ⓘ fossil assemblages ⓘ ironstone concretions ⓘ marine intervals ⓘ nonmarine intervals ⓘ |
| containsFossilsOf |
early vertebrates
ⓘ
invertebrates ⓘ plants ⓘ soft-bodied organisms ⓘ |
| containsMember |
Mazon Creek beds
ⓘ
linked to:
Mazon Creek fossil beds
|
| country | United States of America ⓘ |
| depositionalEnvironment |
coastal plain
ⓘ
deltaic ⓘ swamp ⓘ |
| economicImportance | coal mining ⓘ |
| fossilPreservationType |
Lagerstätte
ⓘ
concretionary preservation ⓘ |
| geologicAge | Pennsylvanian ⓘ |
| geologicPeriod |
Carboniferous
ⓘ
linked to:
Carboniferous period
|
| hasStratigraphicRank | formation ⓘ |
| knownFor |
Mazon Creek fossil localities
ⓘ
exceptionally preserved fossils ⓘ rich coal resources ⓘ |
| lithology |
coal
ⓘ
sandstone ⓘ shale ⓘ siltstone ⓘ |
| locatedIn |
Illinois
ⓘ
Indiana ⓘ United States ⓘ
linked to:
United States of America
|
| notableLocality |
Mazon Creek area
ⓘ
linked to:
Mazon Creek fossil beds
|
| paleoclimate | tropical humid ⓘ |
| partOf |
Illinois Basin
ⓘ
linked to:
Illinois Basin area
|
| region |
Midcontinent United States
ⓘ
linked to:
Central United States
|
| stratigraphicPosition |
above Spoon Formation
ⓘ
below Modesto Formation ⓘ |
| stratigraphicUnitOf |
Pennsylvanian System
ⓘ
linked to:
Pennsylvanian Series
|
| subdivisionOf | Pennsylvanian stratigraphy of Illinois Basin ⓘ |
| usedFor |
coal resource assessment
ⓘ
paleontological research ⓘ |
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: Carbondale Formation Description of subject: 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.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
Illinois Basin area
linked to: Carbondale Formation
linked to: Carbondale Formation