Trinidad Sandstone
E481006
Trinidad Sandstone is a geologic rock formation known for its prominent sandstone layers exposed in parts of the southern Rocky Mountain region of the United States.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Trinidad Sandstone canonical | 3 |
| Trinidad Sandstone (locally, in some classifications) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4935214 — 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: Trinidad Sandstone Context triple: [Raton Basin, contains, Trinidad Sandstone]
-
A.
Lookout Sandstone
Lookout Sandstone is a prominent sedimentary rock formation of the southern Appalachian region, notable for shaping the dramatic cliffs and canyon walls of areas like Little River Canyon.
-
B.
Mereenie Sandstone
Mereenie Sandstone is a significant geological formation in central Australia known for its hydrocarbon-bearing reservoirs and extensive outcrops within the Amadeus Basin.
-
C.
Hawkesbury Sandstone
Hawkesbury Sandstone is a prominent Triassic sedimentary rock formation in the Sydney region of Australia, known for its thick, cliff-forming sandstone beds that shape much of the local landscape and geology.
-
D.
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.
-
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: Trinidad Sandstone Target entity description: Trinidad Sandstone is a geologic rock formation known for its prominent sandstone layers exposed in parts of the southern Rocky Mountain region of the United States.
-
A.
Lookout Sandstone
Lookout Sandstone is a prominent sedimentary rock formation of the southern Appalachian region, notable for shaping the dramatic cliffs and canyon walls of areas like Little River Canyon.
-
B.
Mereenie Sandstone
Mereenie Sandstone is a significant geological formation in central Australia known for its hydrocarbon-bearing reservoirs and extensive outcrops within the Amadeus Basin.
-
C.
Hawkesbury Sandstone
Hawkesbury Sandstone is a prominent Triassic sedimentary rock formation in the Sydney region of Australia, known for its thick, cliff-forming sandstone beds that shape much of the local landscape and geology.
-
D.
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.
-
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 (34)
| Predicate | Object |
|---|---|
| instanceOf |
geologic formation
ⓘ
sedimentary rock unit ⓘ |
| color | light-colored ⓘ |
| contains |
cross-bedded sandstone
ⓘ
invertebrate fossils ⓘ marine fossils ⓘ trace fossils ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| depositionalEnvironment |
deltaic
ⓘ
nearshore marine ⓘ shoreface ⓘ |
| economicUse |
building stone
ⓘ
construction material ⓘ |
| exposedIn |
Raton Basin
ⓘ
northeastern New Mexico ⓘ southeastern Colorado ⓘ |
| geologicAge |
Cretaceous
ⓘ
Late Cretaceous ⓘ |
| grainSize | fine- to medium-grained ⓘ |
| lithology | sandstone ⓘ |
| namedFor | Trinidad, Colorado ⓘ |
| notableFeature |
prominent sandstone cliffs
ⓘ
well-exposed stratigraphic sections ⓘ |
| overlies | Vermejo Formation ⓘ |
| partOf | Western Interior Basin ⓘ |
| region |
Colorado
ⓘ
New Mexico ⓘ southern Rocky Mountains ⓘ |
| rockType | clastic sedimentary rock ⓘ |
| stratigraphicUnitOf | Rocky Mountain region ⓘ |
| studiedIn |
Cretaceous paleoenvironments of the southern Rockies
ⓘ
stratigraphy of the Raton Basin ⓘ |
| thickness | tens of meters ⓘ |
| underlies | Raton Formation ⓘ |
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: Trinidad Sandstone Description of subject: Trinidad Sandstone is a geologic rock formation known for its prominent sandstone layers exposed in parts of the southern Rocky Mountain region of the United States.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Trinidad Sandstone