Mazon Creek fossil beds
E874069
Mazon Creek fossil beds are a renowned Pennsylvanian-age Lagerstätte in Illinois famous for exceptionally well-preserved soft-bodied plants and animals within ironstone concretions.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Mazon Creek (in fossil context) | 1 |
| Mazon Creek Fossil Beds State Natural Area | 1 |
| Mazon Creek fossil beds canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10601366 — 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: Mazon Creek fossil beds Context triple: [Mazon River, hasFossilLocality, Mazon Creek fossil beds]
-
A.
Cleveland-Lloyd Dinosaur Quarry
The Cleveland-Lloyd Dinosaur Quarry is a famous Jurassic fossil site in Utah known for its exceptionally dense concentration of dinosaur bones, particularly those of Allosaurus.
-
B.
Fossil Park
Fossil Park is a public attraction in Sylvania, Ohio, known for its accessible fossil beds where visitors can search for and collect prehistoric marine fossils.
-
C.
Florissant Fossil Beds National Monument
Florissant Fossil Beds National Monument is a protected area in central Colorado renowned for its exceptionally well-preserved Eocene-era plant and insect fossils, including large petrified redwood stumps.
-
D.
John Day Fossil Beds National Monument
John Day Fossil Beds National Monument is a U.S. National Park Service site in Oregon renowned for its well-preserved fossil beds that document over 40 million years of plant and animal evolution.
-
E.
Rhynie Chert fossil locality
The Rhynie Chert fossil locality is a famous Early Devonian site in Scotland renowned for its exceptionally preserved early land plants, arthropods, and microorganisms that provide key insights into the evolution of terrestrial ecosystems.
- 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: Mazon Creek fossil beds Target entity description: Mazon Creek fossil beds are a renowned Pennsylvanian-age Lagerstätte in Illinois famous for exceptionally well-preserved soft-bodied plants and animals within ironstone concretions.
-
A.
Cleveland-Lloyd Dinosaur Quarry
The Cleveland-Lloyd Dinosaur Quarry is a famous Jurassic fossil site in Utah known for its exceptionally dense concentration of dinosaur bones, particularly those of Allosaurus.
-
B.
Fossil Park
Fossil Park is a public attraction in Sylvania, Ohio, known for its accessible fossil beds where visitors can search for and collect prehistoric marine fossils.
-
C.
Florissant Fossil Beds National Monument
Florissant Fossil Beds National Monument is a protected area in central Colorado renowned for its exceptionally well-preserved Eocene-era plant and insect fossils, including large petrified redwood stumps.
-
D.
John Day Fossil Beds National Monument
John Day Fossil Beds National Monument is a U.S. National Park Service site in Oregon renowned for its well-preserved fossil beds that document over 40 million years of plant and animal evolution.
-
E.
Rhynie Chert fossil locality
The Rhynie Chert fossil locality is a famous Early Devonian site in Scotland renowned for its exceptionally preserved early land plants, arthropods, and microorganisms that provide key insights into the evolution of terrestrial ecosystems.
- F. None of above. chosen
Statements (62)
| Predicate | Object |
|---|---|
| instanceOf |
Lagerstätte
ⓘ
fossil site ⓘ |
| associatedWithIndustry | coal mining ⓘ |
| containsFossil |
Acanthodes spp.
NERFINISHED
ⓘ
Amphibians ⓘ Arachnids ⓘ Bivalves ⓘ Calamites ⓘ Cnidarians ⓘ Crustaceans ⓘ Early reptiles ⓘ Esconichthys apopyris NERFINISHED ⓘ Eurypterids NERFINISHED ⓘ Ferns ⓘ Fossil jellyfish ⓘ Gastropods ⓘ Horseshoe crabs ⓘ Insect fossils ⓘ Lepidodendron NERFINISHED ⓘ Lycopsids NERFINISHED ⓘ Millipedes ⓘ Nematodes ⓘ Palaeonisciform fishes ⓘ Polychaete worms ⓘ Seed ferns (pteridosperms) ⓘ Sigillaria NERFINISHED ⓘ Sphenopsids ⓘ Tullimonstrum gregarium NERFINISHED ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| discoveredIn | mid-19th century ⓘ |
| environmentOfDeposition |
coastal plain
ⓘ
deltaic ⓘ estuarine ⓘ |
| geologicAge |
Pennsylvanian
ⓘ
late Carboniferous ⓘ |
| geologicalTimeSpan | approximately 307–309 million years ago ⓘ |
| hasProtectionStatus | partly protected as state park areas ⓘ |
| hasTypeLocality | Mazon River NERFINISHED ⓘ |
| knownFor |
diverse Pennsylvanian biota
ⓘ
exceptional soft-tissue preservation ⓘ exceptionally preserved animals ⓘ exceptionally preserved plants ⓘ soft-bodied fossil preservation ⓘ |
| lithology |
ironstone
ⓘ
sideritic mudstone concretions ⓘ |
| locatedIn |
Grundy County, Illinois
NERFINISHED
ⓘ
Illinois ⓘ Will County, Illinois NERFINISHED ⓘ |
| locatedOnGeologicUnit |
Carboniferous period
GENERATED
ⓘ
Pennsylvanian subperiod GENERATED ⓘ |
| namedAfter | Mazon Creek NERFINISHED ⓘ |
| overlies | Joliet Sandstone NERFINISHED ⓘ |
| partOf |
Illinois Basin
NERFINISHED
ⓘ
Mazon Creek depositional basin NERFINISHED ⓘ |
| preservationType |
concretionary preservation
ⓘ
ironstone concretions ⓘ |
| recognizedAs | one of the most important Carboniferous Lagerstätten ⓘ |
| researchField |
paleobotany
ⓘ
paleoecology ⓘ paleontology ⓘ |
| stratigraphicUnit |
Carbondale Formation
NERFINISHED
ⓘ
Francis Creek Shale 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: Mazon Creek fossil beds Description of subject: Mazon Creek fossil beds are a renowned Pennsylvanian-age Lagerstätte in Illinois famous for exceptionally well-preserved soft-bodied plants and animals within ironstone concretions.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Mazon Creek Fossil Beds State Natural Area
this entity surface form:
Mazon Creek (in fossil context)