Salem Limestone formation
E260669
The Salem Limestone formation is a thick, fossil-rich Mississippian-age limestone unit in the U.S. Midwest, widely quarried as a high-quality building stone used in many prominent American structures.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Salem Limestone formation canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2377359 — 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: Salem Limestone formation Context triple: [Lawrence County, Indiana, geology, Salem Limestone formation]
-
A.
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.
-
B.
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.
-
C.
Holston Formation
The Holston Formation is a geologic unit in eastern Tennessee renowned for its high-quality crystalline limestone commonly marketed as Tennessee marble and widely used in prominent architectural projects.
-
D.
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.
-
E.
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.
- 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: Salem Limestone formation Target entity description: The Salem Limestone formation is a thick, fossil-rich Mississippian-age limestone unit in the U.S. Midwest, widely quarried as a high-quality building stone used in many prominent American structures.
-
A.
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.
-
B.
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.
-
C.
Holston Formation
The Holston Formation is a geologic unit in eastern Tennessee renowned for its high-quality crystalline limestone commonly marketed as Tennessee marble and widely used in prominent architectural projects.
-
D.
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.
-
E.
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.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
geologic formation
ⓘ
limestone unit ⓘ |
| alsoKnownAs |
Indiana limestone
ⓘ
surface form:
Indiana Limestone (in building stone trade)
|
| country |
United States of America
ⓘ
surface form:
United States
|
| depositionalEnvironment |
carbonate platform
ⓘ
shallow marine ⓘ |
| economicUse |
architectural stone
ⓘ
building stone ⓘ dimension stone ⓘ |
| formationRank | formation ⓘ |
| fossilContent |
brachiopods
ⓘ
bryozoans ⓘ corals ⓘ crinoids ⓘ marine fossils ⓘ |
| geologicAge | Mississippian ⓘ |
| geologicPeriod |
Carboniferous period
ⓘ
surface form:
Carboniferous
|
| hasColor |
buff
ⓘ
light gray ⓘ |
| knownFor |
durability
ⓘ
ease of carving ⓘ light color ⓘ uniform texture ⓘ |
| lithology |
fossiliferous limestone
ⓘ
limestone ⓘ |
| locatedInRegion |
Illinois
ⓘ
Indiana ⓘ Kentucky ⓘ Midwestern United States ⓘ |
| namedFor | Salem, Indiana ⓘ |
| overlies |
Harrodsburg Limestone
ⓘ
surface form:
Harrodsburg Limestone (locally)
|
| partOf | Mississippian stratigraphic sequence ⓘ |
| porosity | relatively high ⓘ |
| quarriedIn |
Indiana
ⓘ
Lawrence County, Indiana ⓘ Monroe County, Indiana ⓘ |
| stratigraphicUnitOf |
Illinois Basin area
ⓘ
surface form:
Illinois Basin
|
| subPeriod | Mississippian ⓘ |
| texture | fine- to medium-grained ⓘ |
| thickness | thick-bedded ⓘ |
| underlies |
St. Louis Limestone
ⓘ
surface form:
St. Louis Limestone (locally)
|
| usedFor |
exterior building facades
ⓘ
monuments ⓘ sculptural details ⓘ |
| usedIn | many prominent American buildings ⓘ |
| weatheringResistance | good ⓘ |
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: Salem Limestone formation Description of subject: The Salem Limestone formation is a thick, fossil-rich Mississippian-age limestone unit in the U.S. Midwest, widely quarried as a high-quality building stone used in many prominent American structures.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.