Tuwaiq Mountain Limestone Formation
E824694
The Tuwaiq Mountain Limestone Formation is a prominent Middle Jurassic carbonate rock unit in central Saudi Arabia, known for its thick, fossil-rich limestones that form the core of the Tuwaiq escarpment and host significant hydrocarbon reservoirs.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Tuwaiq Mountain Limestone Formation canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T9836337 — 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: Tuwaiq Mountain Limestone Formation Context triple: [Tuwaiq escarpment, hasStratigraphy, Tuwaiq Mountain Limestone Formation]
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A.
Tura limestone
Tura limestone is a fine white Egyptian limestone historically prized for its high quality and used as the outer casing stone for major monuments such as the Great Pyramid of Giza.
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B.
Barun Goyot Formation
The Barun Goyot Formation is a Late Cretaceous sedimentary rock formation in Mongolia renowned for its rich fossil beds, including remains of the dinosaur Velociraptor.
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C.
Redwall Limestone
Redwall Limestone is a prominent Mississippian-age marine limestone formation best known for forming massive, sheer cliffs in the Grand Canyon region of the southwestern United States.
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D.
Lioz limestone
Lioz limestone is a dense, decorative Portuguese limestone widely used in historic architecture and monuments, especially in and around Lisbon.
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E.
Kaibab Limestone
Kaibab Limestone is a prominent Permian-age sedimentary rock layer that forms the resistant caprock of the Grand Canyon and many other cliffs and plateaus across the Colorado Plateau.
- 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: Tuwaiq Mountain Limestone Formation Target entity description: The Tuwaiq Mountain Limestone Formation is a prominent Middle Jurassic carbonate rock unit in central Saudi Arabia, known for its thick, fossil-rich limestones that form the core of the Tuwaiq escarpment and host significant hydrocarbon reservoirs.
-
A.
Tura limestone
Tura limestone is a fine white Egyptian limestone historically prized for its high quality and used as the outer casing stone for major monuments such as the Great Pyramid of Giza.
-
B.
Barun Goyot Formation
The Barun Goyot Formation is a Late Cretaceous sedimentary rock formation in Mongolia renowned for its rich fossil beds, including remains of the dinosaur Velociraptor.
-
C.
Redwall Limestone
Redwall Limestone is a prominent Mississippian-age marine limestone formation best known for forming massive, sheer cliffs in the Grand Canyon region of the southwestern United States.
-
D.
Lioz limestone
Lioz limestone is a dense, decorative Portuguese limestone widely used in historic architecture and monuments, especially in and around Lisbon.
-
E.
Kaibab Limestone
Kaibab Limestone is a prominent Permian-age sedimentary rock layer that forms the resistant caprock of the Grand Canyon and many other cliffs and plateaus across the Colorado Plateau.
- F. None of above. chosen
Statements (25)
| Predicate | Object |
|---|---|
| instanceOf |
carbonate rock unit
ⓘ
geologic formation ⓘ |
| ageRange | Middle Jurassic (approx. Callovian–Oxfordian) ⓘ |
| composition | thick-bedded limestones ⓘ |
| contains | marine fossils ⓘ |
| country | Saudi Arabia ⓘ |
| depositionalEnvironment | shallow marine carbonate platform ⓘ |
| economicImportance | hosts significant hydrocarbon reservoirs ⓘ |
| forms | core of the Tuwaiq escarpment ⓘ |
| fossilContent | fossil-rich limestones ⓘ |
| geologicAge | Middle Jurassic ⓘ |
| geologicPeriod | Jurassic ⓘ |
| hydrocarbonSystemRole | reservoir rock ⓘ |
| importanceInSaudiArabia | major subsurface reservoir unit ⓘ |
| lithology | limestone ⓘ |
| namedAfter | Tuwaiq Mountain NERFINISHED ⓘ |
| outcropExpression | prominent escarpment-forming unit ⓘ |
| partOf | Mesozoic stratigraphy of Saudi Arabia NERFINISHED ⓘ |
| petroleumGeologySignificance | key reservoir in central Saudi Arabian oil fields ⓘ |
| region | central Saudi Arabia ⓘ |
| rockType | carbonate ⓘ |
| stratigraphicType | formation ⓘ |
| stratigraphicUnitOf | Arabian Plate NERFINISHED ⓘ |
| surfaceOccurrence | exposed along Tuwaiq escarpment ⓘ |
| thicknessCharacteristic | thick carbonate succession ⓘ |
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: Tuwaiq Mountain Limestone Formation Description of subject: The Tuwaiq Mountain Limestone Formation is a prominent Middle Jurassic carbonate rock unit in central Saudi Arabia, known for its thick, fossil-rich limestones that form the core of the Tuwaiq escarpment and host significant hydrocarbon reservoirs.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.