Summerville Formation
E273048
The Summerville Formation is a Late Jurassic sedimentary rock unit in the western United States, characterized by thin-bedded mudstones and sandstones deposited in tidal flat and coastal environments.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Summerville Formation canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T2509899 — 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: Summerville Formation Context triple: [Morrison Formation, overlies, Summerville Formation]
-
A.
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.
-
B.
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.
-
C.
Salem Limestone formation
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.
-
D.
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.
-
E.
Morrison Formation
The Morrison Formation is a vast Late Jurassic sedimentary rock formation in the western United States renowned for its exceptionally rich assemblage of dinosaur fossils, including iconic sauropods and theropods.
- 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: Summerville Formation Target entity description: The Summerville Formation is a Late Jurassic sedimentary rock unit in the western United States, characterized by thin-bedded mudstones and sandstones deposited in tidal flat and coastal environments.
-
A.
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.
-
B.
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.
-
C.
Salem Limestone formation
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.
-
D.
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.
-
E.
Morrison Formation
The Morrison Formation is a vast Late Jurassic sedimentary rock formation in the western United States renowned for its exceptionally rich assemblage of dinosaur fossils, including iconic sauropods and theropods.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
geologic formation
ⓘ
sedimentary rock unit ⓘ |
| beddingCharacteristic | thin-bedded ⓘ |
| climateIndicator | arid to semi-arid conditions ⓘ |
| colorCharacteristic |
brown
ⓘ
red ⓘ |
| contains |
evaporite beds
ⓘ
gypsum ⓘ limestone lenses ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| depositionalEnvironment |
coastal
ⓘ
tidal flat ⓘ |
| diageneticFeature |
cemented by calcite
ⓘ
iron-oxide staining ⓘ |
| exposedIn | canyons of the Colorado Plateau ⓘ |
| fossilContent |
dinosaur tracks
ⓘ
invertebrate trace fossils ⓘ |
| geologicAge | Jurassic ⓘ |
| geologicPeriod | Late Jurassic ⓘ |
| grainSize | fine-grained ⓘ |
| hasEconomicInterest | construction stone (local use) ⓘ |
| hasStratigraphicRank | formation ⓘ |
| hasStratigraphicRelationship | correlative with Curtis Formation in some areas ⓘ |
| lithology |
mudstone
ⓘ
sandstone ⓘ |
| locatedIn | western United States ⓘ |
| namedFor | Summerville Point, Emery County, Utah ⓘ |
| notableExposure |
Arches National Park
ⓘ
Capitol Reef National Park ⓘ Dinosaur National Monument ⓘ |
| overlies | Entrada Sandstone ⓘ |
| paleogeography | nearshore marine to coastal plain ⓘ |
| partOf | San Rafael Group ⓘ |
| primarySedimentaryProcess | tidal deposition ⓘ |
| region |
Colorado
ⓘ
New Mexico ⓘ Utah ⓘ Wyoming ⓘ |
| researchField |
sedimentology
ⓘ
stratigraphy ⓘ |
| sedimentaryStructure |
mud cracks
ⓘ
ripple marks ⓘ |
| stratigraphicUnitOf |
Colorado Plateau
ⓘ
surface form:
Colorado Plateau region
|
| tectonicSetting | passive continental margin ⓘ |
| thickness | generally less than 100 meters ⓘ |
| timeSpanEnd |
Kimmeridgian stage
ⓘ
surface form:
Kimmeridgian
|
| timeSpanStart | Oxfordian ⓘ |
| underlies | Morrison 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: Summerville Formation Description of subject: The Summerville Formation is a Late Jurassic sedimentary rock unit in the western United States, characterized by thin-bedded mudstones and sandstones deposited in tidal flat and coastal environments.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.