Vermejo Formation
E482798
The Vermejo Formation is a Late Cretaceous sedimentary rock unit in the Raton Basin of the western United States, known for its coal-bearing strata and significance in regional stratigraphy.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Vermejo Formation canonical | 4 |
How this entity was disambiguated
This entity first appeared as the object of triple T4935213 — 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: Vermejo Formation Context triple: [Raton Basin, contains, Vermejo Formation]
-
A.
Raton Formation
The Raton Formation is a geologic rock unit in the Raton Basin of Colorado and New Mexico, notable for preserving Late Cretaceous to early Paleogene sediments and fossils, including evidence across the Cretaceous–Paleogene boundary.
-
B.
Chinle Formation
The Chinle Formation is a Late Triassic geologic formation in the southwestern United States, renowned for its colorful badlands, rich fossil beds, and extensive petrified wood deposits.
-
C.
Kayenta Formation
The Kayenta Formation is an Early Jurassic sandstone and siltstone rock unit on the Colorado Plateau, renowned for its distinctive red cliffs and important dinosaur fossil trackways.
-
D.
Areyonga Formation
The Areyonga Formation is a geological rock unit within central Australia's Amadeus Basin, known for its sedimentary sequences that record Proterozoic environmental and tectonic history.
-
E.
Claron Formation
The Claron Formation is a geologic rock unit of colorful limestones and mudstones best known for forming the striking hoodoos and cliffs of Bryce Canyon and other parts of the Paunsaugunt Plateau in southern Utah.
- 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: Vermejo Formation Target entity description: The Vermejo Formation is a Late Cretaceous sedimentary rock unit in the Raton Basin of the western United States, known for its coal-bearing strata and significance in regional stratigraphy.
-
A.
Raton Formation
The Raton Formation is a geologic rock unit in the Raton Basin of Colorado and New Mexico, notable for preserving Late Cretaceous to early Paleogene sediments and fossils, including evidence across the Cretaceous–Paleogene boundary.
-
B.
Chinle Formation
The Chinle Formation is a Late Triassic geologic formation in the southwestern United States, renowned for its colorful badlands, rich fossil beds, and extensive petrified wood deposits.
-
C.
Kayenta Formation
The Kayenta Formation is an Early Jurassic sandstone and siltstone rock unit on the Colorado Plateau, renowned for its distinctive red cliffs and important dinosaur fossil trackways.
-
D.
Areyonga Formation
The Areyonga Formation is a geological rock unit within central Australia's Amadeus Basin, known for its sedimentary sequences that record Proterozoic environmental and tectonic history.
-
E.
Claron Formation
The Claron Formation is a geologic rock unit of colorful limestones and mudstones best known for forming the striking hoodoos and cliffs of Bryce Canyon and other parts of the Paunsaugunt Plateau in southern Utah.
- F. None of above. chosen
Statements (30)
| Predicate | Object |
|---|---|
| instanceOf |
geologic formation
ⓘ
sedimentary rock unit ⓘ |
| age | Late Cretaceous–earliest Paleogene boundary interval (approximate) ⓘ |
| chronostratigraphicPosition | Maastrichtian ⓘ |
| contains |
coal seams
ⓘ
nonmarine sediments ⓘ plant fossils ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| depositionalEnvironment |
coastal plain
ⓘ
deltaic ⓘ fluvial ⓘ |
| economicImportance | coal resource ⓘ |
| geologicPeriod | Late Cretaceous ⓘ |
| lithology |
carbonaceous shale
ⓘ
coal ⓘ sandstone ⓘ shale ⓘ siltstone ⓘ |
| locatedIn |
Colorado
ⓘ
New Mexico ⓘ western United States ⓘ |
| namedFor |
Vermejo Park region (northern New Mexico–southern Colorado)
ⓘ
linked to:
Northern New Mexico
|
| notableFor |
coal-bearing strata
ⓘ
regional stratigraphic marker ⓘ |
| overlies | Trinidad Sandstone ⓘ |
| partOf | Raton Basin ⓘ |
| region |
southern Rocky Mountains
ⓘ
linked to:
Southern Rocky Mountains
|
| stratigraphicUnitOf | Raton Basin coal measures ⓘ |
| underlies | Raton Formation ⓘ |
| usedFor | stratigraphic correlation in the Raton Basin ⓘ |
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: Vermejo Formation Description of subject: The Vermejo Formation is a Late Cretaceous sedimentary rock unit in the Raton Basin of the western United States, known for its coal-bearing strata and significance in regional stratigraphy.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.