Devonian Fossil Gorge
E40904
Devonian Fossil Gorge is an exposed ancient seabed near Iowa City where visitors can see well-preserved marine fossils from the Devonian period revealed by modern flood erosion.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Devonian Fossil Gorge canonical | 5 |
How this entity was disambiguated
This entity first appeared as the object of triple T317582 — 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: Devonian Fossil Gorge Context triple: [Iowa City, Iowa, isHomeOf, Devonian Fossil Gorge]
-
A.
Cascadilla Gorge
Cascadilla Gorge is a scenic, steep-sided ravine in Ithaca, New York, known for its cascading waterfalls, stone trails, and role as a popular natural area near Cornell University.
-
B.
Hemlock Gorge Reservation
Hemlock Gorge Reservation is a scenic state-owned natural area along the Charles River in Newton, Massachusetts, known for its wooded trails, river views, and historic Echo Bridge.
-
C.
Benagil Cave
Benagil Cave is a famous seaside grotto in Portugal known for its dramatic domed ceiling, natural skylight, and golden-sand beach accessible mainly by boat or kayak.
-
D.
Lehman Caves
Lehman Caves is an extensive marble cave system famed for its intricate formations, located within Great Basin National Park in eastern Nevada.
-
E.
Giant Forest
Giant Forest is a renowned grove of massive giant sequoia trees in California, home to some of the largest trees on Earth, including the General Sherman Tree.
- 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: Devonian Fossil Gorge Target entity description: Devonian Fossil Gorge is an exposed ancient seabed near Iowa City where visitors can see well-preserved marine fossils from the Devonian period revealed by modern flood erosion.
-
A.
Cascadilla Gorge
Cascadilla Gorge is a scenic, steep-sided ravine in Ithaca, New York, known for its cascading waterfalls, stone trails, and role as a popular natural area near Cornell University.
-
B.
Hemlock Gorge Reservation
Hemlock Gorge Reservation is a scenic state-owned natural area along the Charles River in Newton, Massachusetts, known for its wooded trails, river views, and historic Echo Bridge.
-
C.
Benagil Cave
Benagil Cave is a famous seaside grotto in Portugal known for its dramatic domed ceiling, natural skylight, and golden-sand beach accessible mainly by boat or kayak.
-
D.
Lehman Caves
Lehman Caves is an extensive marble cave system famed for its intricate formations, located within Great Basin National Park in eastern Nevada.
-
E.
Giant Forest
Giant Forest is a renowned grove of massive giant sequoia trees in California, home to some of the largest trees on Earth, including the General Sherman Tree.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
fossil site
ⓘ
geologic formation ⓘ tourist attraction ⓘ |
| approximateAge | 375 million years ⓘ |
| containsFossilsOf |
brachiopods
ⓘ
bryozoans ⓘ cephalopods ⓘ corals ⓘ crinoids ⓘ marine invertebrates ⓘ trilobites ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| environmentType | ancient seabed ⓘ |
| exposedBy |
1993 Midwest floods
ⓘ
flood erosion ⓘ |
| formedBy | erosion ⓘ |
| furtherExposedBy | 2008 Iowa flood ⓘ |
| geologicAge |
Devonian period
ⓘ
linked to:
Devonian Period
|
| geologicPeriod | Paleozoic era ⓘ |
| hasAccess | parking area near Coralville Dam ⓘ |
| hasEducationalUse |
field site for geology classes
ⓘ
field site for paleontology classes ⓘ |
| hasFeature |
interpretive signs
ⓘ
interpretive trail ⓘ numbered fossil stops ⓘ overlook platforms ⓘ |
| hasRelief | gorge ⓘ |
| locatedAt | Coralville Lake ⓘ |
| locatedIn | Johnson County, Iowa ⓘ |
| locatedNear |
Coralville Dam
ⓘ
Iowa City, Iowa ⓘ |
| managedBy | U.S. Army Corps of Engineers ⓘ |
| nearbyWaterBody | Iowa River ⓘ |
| notableFor |
excellent exposure of Paleozoic strata
ⓘ
well-preserved Devonian marine fossils ⓘ |
| openToPublic | true ⓘ |
| partOf |
Coralville Lake recreation area
ⓘ
linked to:
Coralville Lake
|
| region | Midwestern United States ⓘ |
| rockType |
dolomite
ⓘ
limestone ⓘ |
| state | Iowa ⓘ |
| subjectOf |
educational programs
ⓘ
geologic research ⓘ |
| touristActivity |
fossil observation
ⓘ
geology education ⓘ hiking ⓘ |
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: Devonian Fossil Gorge Description of subject: Devonian Fossil Gorge is an exposed ancient seabed near Iowa City where visitors can see well-preserved marine fossils from the Devonian period revealed by modern flood erosion.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.