Illinois Basin area
E812279
The Illinois Basin area is a major structural and sedimentary basin in the central United States, primarily underlying parts of Illinois, Indiana, and Kentucky, known for its thick Paleozoic rock sequences and significant fossil fuel and mineral resources.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Illinois Basin | 1 |
| Illinois Basin area canonical | 1 |
| Illinois Basin region | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T9643260 — 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: Illinois Basin area Context triple: [Harrodsburg Limestone, region, Illinois Basin area]
-
A.
Michigan Basin
The Michigan Basin is a large, bowl-shaped sedimentary basin in the Great Lakes region known for its thick Paleozoic rock sequences and significant oil, gas, and mineral resources.
-
B.
Arkoma Basin
The Arkoma Basin is a geologic sedimentary basin in the south-central United States, primarily in Arkansas and Oklahoma, known for its Paleozoic rock formations and significant natural gas and petroleum resources.
-
C.
Mississippi Embayment
The Mississippi Embayment is a broad, low-lying structural trough and sedimentary basin of the central United States that extends northward from the Gulf of Mexico and encompasses parts of several states along the lower Mississippi River.
-
D.
Illinois River Valley
The Illinois River Valley is a prominent Midwestern river valley in the U.S. state of Illinois, characterized by its broad floodplains, rich agricultural land, and historical role as a transportation and trade corridor.
-
E.
Nashville Basin
The Nashville Basin is a geologic and topographic lowland in central Tennessee known for its fertile soils, karst features, and distinctive bowl-shaped landscape surrounding the city of Nashville.
- 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: Illinois Basin area Target entity description: The Illinois Basin area is a major structural and sedimentary basin in the central United States, primarily underlying parts of Illinois, Indiana, and Kentucky, known for its thick Paleozoic rock sequences and significant fossil fuel and mineral resources.
-
A.
Michigan Basin
The Michigan Basin is a large, bowl-shaped sedimentary basin in the Great Lakes region known for its thick Paleozoic rock sequences and significant oil, gas, and mineral resources.
-
B.
Arkoma Basin
The Arkoma Basin is a geologic sedimentary basin in the south-central United States, primarily in Arkansas and Oklahoma, known for its Paleozoic rock formations and significant natural gas and petroleum resources.
-
C.
Mississippi Embayment
The Mississippi Embayment is a broad, low-lying structural trough and sedimentary basin of the central United States that extends northward from the Gulf of Mexico and encompasses parts of several states along the lower Mississippi River.
-
D.
Illinois River Valley
The Illinois River Valley is a prominent Midwestern river valley in the U.S. state of Illinois, characterized by its broad floodplains, rich agricultural land, and historical role as a transportation and trade corridor.
-
E.
Nashville Basin
The Nashville Basin is a geologic and topographic lowland in central Tennessee known for its fertile soils, karst features, and distinctive bowl-shaped landscape surrounding the city of Nashville.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
sedimentary basin
ⓘ
structural basin ⓘ |
| boundedBy |
Cincinnati Arch
NERFINISHED
ⓘ
Kankakee Arch NERFINISHED ⓘ Ozark Uplift NERFINISHED ⓘ |
| contains | Illinois Basin coalfield NERFINISHED ⓘ |
| containsStratigraphy |
Cambrian system
NERFINISHED
ⓘ
Devonian system NERFINISHED ⓘ Mississippian system NERFINISHED ⓘ Ordovician system ⓘ Pennsylvanian system NERFINISHED ⓘ Permian system (locally thin or absent) ⓘ Silurian system NERFINISHED ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| depositionalHistory | marine shelf and shallow sea deposition during Paleozoic ⓘ |
| developedDuring | late Precambrian to early Paleozoic subsidence ⓘ |
| economicImportance | major fossil fuel province in the midcontinent region ⓘ |
| geologicAge | Paleozoic ⓘ |
| hasAlternativeName | Illinois Basin area NERFINISHED ⓘ |
| hasMaximumThickness | more than 4,000 meters of sedimentary rocks ⓘ |
| hasResource |
coal
ⓘ
dolomite ⓘ fluorspar ⓘ groundwater aquifers ⓘ lead-zinc mineralization ⓘ limestone ⓘ natural gas ⓘ oil shale ⓘ petroleum ⓘ |
| hasRockSequence | thick Paleozoic sedimentary rocks ⓘ |
| hasShape | broad asymmetrical structural depression ⓘ |
| hasStructuralFeature |
basin axis trending northwest-southeast
ⓘ
gentle regional dip toward basin center ⓘ |
| knownFor |
Mississippian carbonate reservoirs
ⓘ
extensive coal-bearing Pennsylvanian strata ⓘ |
| locatedIn |
Illinois
ⓘ
Indiana ⓘ Kentucky ⓘ |
| overlies | Precambrian basement rocks ⓘ |
| partOf | central United States ⓘ |
| researchImportance | key area for studying Paleozoic stratigraphy of the midcontinent ⓘ |
| tectonicSetting | interior cratonic basin ⓘ |
| usedFor |
coal mining
ⓘ
groundwater supply ⓘ oil and gas production ⓘ underground natural gas storage ⓘ |
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: Illinois Basin area Description of subject: The Illinois Basin area is a major structural and sedimentary basin in the central United States, primarily underlying parts of Illinois, Indiana, and Kentucky, known for its thick Paleozoic rock sequences and significant fossil fuel and mineral resources.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Salem Limestone
this entity surface form:
Illinois Basin
this entity surface form:
Illinois Basin region