Great Valley forearc basin
E1007493
The Great Valley forearc basin is a large sedimentary basin in central California that formed between the Sierra Nevada and Coast Ranges as part of the ancient subduction-related tectonic margin of western North America.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Great Valley forearc basin canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T12854175 — 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: Great Valley forearc basin Context triple: [Sierra Nevada–Great Valley block, containsFeature, Great Valley forearc basin]
-
A.
Cascadia back-arc region
The Cascadia back-arc region is a tectonically active area east of the Cascadia subduction zone characterized by crustal extension, volcanism, and associated magmatic and geothermal activity.
-
B.
Liquiñe-Ofqui Fault Zone
The Liquiñe-Ofqui Fault Zone is a major strike-slip fault system in southern Chile that controls much of the region’s tectonic activity, volcanism, and seismicity along the Andean margin.
-
C.
Gloria Fault
The Gloria Fault is a major transform fault in the North Atlantic Ocean that forms part of the boundary between the Eurasian and African tectonic plates near the Azores region.
-
D.
Ardmore Basin (geologic)
Ardmore Basin (geologic) is a sedimentary basin in southern Oklahoma known for its complex structural geology and significant oil and gas resources.
-
E.
Eastern Cordillera Basin
The Eastern Cordillera Basin is a major sedimentary basin associated with the Eastern Cordillera of the Andes, known for its thick accumulations of sedimentary rocks and significant hydrocarbon potential.
- 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: Great Valley forearc basin Target entity description: The Great Valley forearc basin is a large sedimentary basin in central California that formed between the Sierra Nevada and Coast Ranges as part of the ancient subduction-related tectonic margin of western North America.
-
A.
Cascadia back-arc region
The Cascadia back-arc region is a tectonically active area east of the Cascadia subduction zone characterized by crustal extension, volcanism, and associated magmatic and geothermal activity.
-
B.
Liquiñe-Ofqui Fault Zone
The Liquiñe-Ofqui Fault Zone is a major strike-slip fault system in southern Chile that controls much of the region’s tectonic activity, volcanism, and seismicity along the Andean margin.
-
C.
Gloria Fault
The Gloria Fault is a major transform fault in the North Atlantic Ocean that forms part of the boundary between the Eurasian and African tectonic plates near the Azores region.
-
D.
Ardmore Basin (geologic)
Ardmore Basin (geologic) is a sedimentary basin in southern Oklahoma known for its complex structural geology and significant oil and gas resources.
-
E.
Eastern Cordillera Basin
The Eastern Cordillera Basin is a major sedimentary basin associated with the Eastern Cordillera of the Andes, known for its thick accumulations of sedimentary rocks and significant hydrocarbon potential.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
forearc basin
ⓘ
geologic province ⓘ sedimentary basin ⓘ |
| associatedWith | Farallon Plate subduction ⓘ |
| boundedBy |
California Coast Ranges
NERFINISHED
ⓘ
Sierra Nevada NERFINISHED ⓘ |
| contains | thick marine sedimentary sequence ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| depositionalEnvironment |
forearc basin setting
ⓘ
marine ⓘ |
| developedBetween |
Franciscan subduction complex
NERFINISHED
ⓘ
Sierra Nevada and Coast Ranges NERFINISHED ⓘ Sierra Nevada magmatic arc NERFINISHED ⓘ |
| economicImportance |
groundwater basin
ⓘ
petroleum reservoir province ⓘ |
| extendsAlong | length of California’s Central Valley ⓘ |
| filledWith | Great Valley Group sediments ⓘ |
| formedAsPartOf | ancient subduction-related tectonic margin of western North America ⓘ |
| geologicAge |
Cretaceous
NERFINISHED
ⓘ
Late Jurassic ⓘ Mesozoic ⓘ |
| hasStratigraphicUnit | Great Valley Group NERFINISHED ⓘ |
| knownFor | recording Mesozoic subduction history of western North America ⓘ |
| locatedIn |
California, United States
ⓘ
surface form:
California
United States of America ⓘ
surface form:
United States
central California NERFINISHED ⓘ |
| orientation | northwest-southeast trending ⓘ |
| overlies |
Coast Range ophiolite
NERFINISHED
ⓘ
Franciscan Complex NERFINISHED ⓘ |
| paleogeographicPosition | forearc region of western North America ⓘ |
| partOf |
Cordilleran forearc system
ⓘ
Great Valley NERFINISHED ⓘ |
| primaryLithology |
marine clastic sediments
ⓘ
sandstone ⓘ shale ⓘ siltstone ⓘ |
| region | western North America ⓘ |
| relatedTo | Sierra Nevada batholith NERFINISHED ⓘ |
| researchField |
petroleum geology
ⓘ
sedimentary geology ⓘ tectonics ⓘ |
| separatedFrom |
Coast Ranges by major faults
ⓘ
Sierra Nevada by major faults ⓘ |
| tectonicSetting |
convergent margin
ⓘ
subduction zone margin ⓘ |
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: Great Valley forearc basin Description of subject: The Great Valley forearc basin is a large sedimentary basin in central California that formed between the Sierra Nevada and Coast Ranges as part of the ancient subduction-related tectonic margin of western North America.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.