Curtis Formation
E904943
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.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Curtis Formation canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T11031850 — 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: Curtis Formation Context triple: [Entrada Sandstone, underlies, Curtis Formation]
-
A.
Cloverly Formation
The Cloverly Formation is an Early Cretaceous geologic formation in the western United States known for its dinosaur fossils and fluvial sedimentary deposits.
-
B.
Calvert Formation
The Calvert Formation is a geologic formation along the Chesapeake Bay in Maryland, renowned for its Miocene-age marine sediments and abundant fossil beds exposed in the Calvert Cliffs.
-
C.
Boone Formation
The Boone Formation is a Mississippian-age carbonate rock unit of cherty limestones and dolomites widely exposed across parts of the Ozark region in the central United States.
-
D.
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.
-
E.
Carbondale Formation
The Carbondale Formation is a Pennsylvanian-age rock unit in the Illinois Basin renowned for its rich coal beds and exceptionally preserved fossil assemblages, including those of the Mazon Creek area.
- 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: Curtis Formation Target entity description: 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.
-
A.
Cloverly Formation
The Cloverly Formation is an Early Cretaceous geologic formation in the western United States known for its dinosaur fossils and fluvial sedimentary deposits.
-
B.
Calvert Formation
The Calvert Formation is a geologic formation along the Chesapeake Bay in Maryland, renowned for its Miocene-age marine sediments and abundant fossil beds exposed in the Calvert Cliffs.
-
C.
Boone Formation
The Boone Formation is a Mississippian-age carbonate rock unit of cherty limestones and dolomites widely exposed across parts of the Ozark region in the central United States.
-
D.
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.
-
E.
Carbondale Formation
The Carbondale Formation is a Pennsylvanian-age rock unit in the Illinois Basin renowned for its rich coal beds and exceptionally preserved fossil assemblages, including those of the Mazon Creek area.
- F. None of above. chosen
Statements (33)
| Predicate | Object |
|---|---|
| instanceOf |
geologic formation
ⓘ
stratigraphic unit ⓘ |
| contains |
bioturbation structures
ⓘ
cross-bedding ⓘ marine fossils ⓘ ripple laminations ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| depositionalSetting | epicontinental sea ⓘ |
| environmentOfDeposition |
shallow marine
ⓘ
shoreface ⓘ |
| geologicAge | Middle Jurassic ⓘ |
| geologicPeriod | Jurassic ⓘ |
| grainSize |
fine-grained
ⓘ
medium-grained ⓘ |
| hasStratigraphicRank | formation ⓘ |
| isPartOfBasin | Cordilleran foreland region NERFINISHED ⓘ |
| lithology |
sandstone
ⓘ
siltstone ⓘ |
| locatedIn |
Colorado
ⓘ
Utah ⓘ Wyoming ⓘ western United States NERFINISHED ⓘ |
| maximumThickness |
about 150 meters
ⓘ
about 500 feet ⓘ |
| namedFor | Curtis, Utah NERFINISHED ⓘ |
| overlies | Entrada Sandstone NERFINISHED ⓘ |
| partOf | Colorado Plateau NERFINISHED ⓘ |
| primaryColor | greenish gray ⓘ |
| region | Intermountain West NERFINISHED ⓘ |
| stratigraphicUnitOf | San Rafael Group NERFINISHED ⓘ |
| tectonicSetting | passive margin ⓘ |
| underlies |
Morrison Formation
NERFINISHED
ⓘ
Summerville Formation 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: Curtis Formation Description of subject: 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.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.