Graneros Shale
E934193
Graneros Shale is a Cretaceous-age marine shale formation in the central United States, notable for recording the early transgression of the Western Interior Seaway and for its fossil-rich, fine-grained sediments.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Benton Shale | 1 |
| Graneros Shale canonical | 1 |
| Mancos Shale | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T11591064 — 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: Graneros Shale Context triple: [Dakota Formation, underlies, Graneros Shale]
-
A.
Spraberry Formation
The Spraberry Formation is a major oil-bearing geologic unit in West Texas, renowned as one of the most prolific tight oil reservoirs within the Permian Basin.
-
B.
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.
-
C.
Marcellus Shale
Marcellus Shale is a vast natural gas–rich sedimentary rock formation underlying much of the Appalachian Basin in the eastern United States, notably Pennsylvania, West Virginia, Ohio, and New York.
-
D.
Curtis Formation
The Curtis Formation is a Middle Jurassic geologic unit in the western United States, characterized mainly by marine sandstones and siltstones that record shallow sea environments.
-
E.
Diablo Formation
The Diablo Formation is a geologic rock unit in California known as a significant petroleum-bearing reservoir within fields such as the Belridge Oil Field.
- 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: Graneros Shale Target entity description: Graneros Shale is a Cretaceous-age marine shale formation in the central United States, notable for recording the early transgression of the Western Interior Seaway and for its fossil-rich, fine-grained sediments.
-
A.
Spraberry Formation
The Spraberry Formation is a major oil-bearing geologic unit in West Texas, renowned as one of the most prolific tight oil reservoirs within the Permian Basin.
-
B.
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.
-
C.
Marcellus Shale
Marcellus Shale is a vast natural gas–rich sedimentary rock formation underlying much of the Appalachian Basin in the eastern United States, notably Pennsylvania, West Virginia, Ohio, and New York.
-
D.
Curtis Formation
The Curtis Formation is a Middle Jurassic geologic unit in the western United States, characterized mainly by marine sandstones and siltstones that record shallow sea environments.
-
E.
Diablo Formation
The Diablo Formation is a geologic rock unit in California known as a significant petroleum-bearing reservoir within fields such as the Belridge Oil Field.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
Cretaceous stratigraphic unit
ⓘ
geologic formation ⓘ shale formation ⓘ |
| color | dark gray ⓘ |
| contains |
bentonitic clay layers
ⓘ
ironstone concretions ⓘ organic-rich shale intervals ⓘ siltstone interbeds ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| depositionalEnvironment | marine ⓘ |
| exposedIn |
Colorado
NERFINISHED
ⓘ
Kansas NERFINISHED ⓘ Montana NERFINISHED ⓘ Nebraska NERFINISHED ⓘ South Dakota NERFINISHED ⓘ Wyoming NERFINISHED ⓘ |
| fossilContent |
ammonites
ⓘ
bivalves ⓘ fish remains ⓘ foraminifera ⓘ marine invertebrate fossils ⓘ ostracods ⓘ |
| geologicAge | Cretaceous ⓘ |
| grainSize | fine-grained ⓘ |
| lithology | marine shale ⓘ |
| locatedIn | central United States ⓘ |
| memberOf |
Colorado Group in some areas
ⓘ
Colorado Shale in some classifications ⓘ |
| namedFor | Graneros, Kansas NERFINISHED ⓘ |
| notableFor |
fossil-rich sediments
ⓘ
recording early Western Interior Seaway flooding ⓘ |
| overlies | Dakota Sandstone NERFINISHED ⓘ |
| paleoenvironment |
low-energy marine environment
ⓘ
offshore shelf setting ⓘ |
| partOf | Western Interior Seaway succession NERFINISHED ⓘ |
| primaryLithology | shale ⓘ |
| records | early transgression of the Western Interior Seaway ⓘ |
| region |
Great Plains
ⓘ
Rocky Mountain region NERFINISHED ⓘ |
| researchUse |
paleoenvironmental reconstruction of Western Interior Seaway
ⓘ
stratigraphic marker for early Cenomanian transgression ⓘ |
| series | Upper Cretaceous NERFINISHED ⓘ |
| stage | Cenomanian NERFINISHED ⓘ |
| stratigraphicPosition | lies above Dakota Sandstone in many areas ⓘ |
| stratigraphicUnitRank | formation ⓘ |
| system | Cretaceous System NERFINISHED ⓘ |
| underlies |
Greenhorn Formation
NERFINISHED
ⓘ
Greenhorn Limestone NERFINISHED ⓘ |
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: Graneros Shale Description of subject: Graneros Shale is a Cretaceous-age marine shale formation in the central United States, notable for recording the early transgression of the Western Interior Seaway and for its fossil-rich, fine-grained sediments.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Mancos Shale
this entity surface form:
Benton Shale