Redwall Limestone
E591905
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.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Redwall Limestone canonical | 2 |
| Redwall Limestone (exposed in cliffs below) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T6435046 — 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: Redwall Limestone Context triple: [Supai Group, overlies, Redwall Limestone]
-
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.
Mitchell Limestone
Mitchell Limestone is a geologic limestone formation known from the Midwestern United States, recognized for its stratigraphic position and fossil-bearing carbonate rocks.
-
C.
Euville limestone
Euville limestone is a fine-grained, light-colored French building stone historically prized for monumental and architectural works.
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D.
Carboniferous Limestone
Carboniferous Limestone is a thick sequence of fossil-rich sedimentary rocks formed in warm, shallow tropical seas during the Carboniferous period, widely exposed in regions such as the White Peak of the Peak District.
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E.
Harrodsburg Limestone
Harrodsburg Limestone is a Mississippian-age carbonate rock formation in the central United States, notable for its fossil-rich marine deposits and use as a building stone.
- 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: Redwall Limestone Target entity description: 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.
-
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.
Mitchell Limestone
Mitchell Limestone is a geologic limestone formation known from the Midwestern United States, recognized for its stratigraphic position and fossil-bearing carbonate rocks.
-
C.
Euville limestone
Euville limestone is a fine-grained, light-colored French building stone historically prized for monumental and architectural works.
-
D.
Carboniferous Limestone
Carboniferous Limestone is a thick sequence of fossil-rich sedimentary rocks formed in warm, shallow tropical seas during the Carboniferous period, widely exposed in regions such as the White Peak of the Peak District.
-
E.
Harrodsburg Limestone
Harrodsburg Limestone is a Mississippian-age carbonate rock formation in the central United States, notable for its fossil-rich marine deposits and use as a building stone.
- F. None of above. chosen
Statements (30)
| Predicate | Object |
|---|---|
| instanceOf |
geologic formation
ⓘ
limestone formation ⓘ |
| ageRange | Early Mississippian to Middle Mississippian ⓘ |
| color | gray ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| depositionalEnvironment |
carbonate platform
ⓘ
shallow marine ⓘ |
| forms |
massive cliffs
ⓘ
sheer cliffs ⓘ |
| fossilContent |
brachiopods
ⓘ
bryozoans ⓘ corals ⓘ crinoids ⓘ marine invertebrates ⓘ |
| geologicAge | Mississippian ⓘ |
| geologicProvince | Colorado Plateau ⓘ |
| knownFor | forming prominent cliffs in the Grand Canyon ⓘ |
| lithology | limestone ⓘ |
| namedFor | Redwall ⓘ |
| notableExposure |
Grand Canyon
ⓘ
linked to:
Grand Canyon National Park
|
| overlies |
Muav Limestone
ⓘ
Temple Butte Formation ⓘ |
| partOf | Grand Canyon stratigraphy ⓘ |
| period | Carboniferous ⓘ |
| primaryLithology | marine limestone ⓘ |
| region | southwestern United States ⓘ |
| thickness | hundreds of meters ⓘ |
| underlies |
Supai Group
ⓘ
Surprise Canyon Formation ⓘ |
| weatheringCharacteristic | forms steep vertical walls ⓘ |
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: Redwall Limestone Description of subject: 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.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Redwall Limestone