Yixian Formation

E724085
fossil-bearing stratigraphic unit geological formation

The Yixian Formation is an Early Cretaceous geological formation in northeastern China renowned for its exceptionally well-preserved fossils, including early mammals, feathered dinosaurs, and primitive birds.

Try in SPARQL Jump to: Surface forms Statements Referenced by

All labels observed (1)

Label Occurrences
Yixian Formation canonical 2

Statements (52)

Predicate Object
instanceOf fossil-bearing stratigraphic unit ⓘ
geological formation ⓘ
age Aptian ⓘ
Barremian NERFINISHED ⓘ
containsFossil Caudipteryx NERFINISHED ⓘ
Confuciusornis NERFINISHED ⓘ
Eomaia NERFINISHED ⓘ
Ephedra NERFINISHED ⓘ
Ginkgoites NERFINISHED ⓘ
Jeholornis NERFINISHED ⓘ
Liaoningosaurus NERFINISHED ⓘ
Lycoptera NERFINISHED ⓘ
Microraptor NERFINISHED ⓘ
Psittacosaurus NERFINISHED ⓘ
Repenomamus NERFINISHED ⓘ
Sinornithosaurus NERFINISHED ⓘ
Sinosauropteryx NERFINISHED ⓘ
Yixianosaurus NERFINISHED ⓘ
fossil amphibians ⓘ
fossil fishes ⓘ
fossil insects ⓘ
fossil pterosaurs ⓘ
fossil turtles ⓘ
containsMember Jianshangou Bed NERFINISHED ⓘ
Lujiatun Bed NERFINISHED ⓘ
country China ⓘ
depositionalEnvironment lacustrine ⓘ
volcaniclastic ⓘ
discoveredIn 20th century ⓘ
geologicalPeriod Early Cretaceous NERFINISHED ⓘ
knownFor Jehol Biota NERFINISHED ⓘ
early mammal fossils ⓘ
exceptional fossil preservation ⓘ
feathered dinosaur fossils ⓘ
primitive bird fossils ⓘ
lithology andesite ⓘ
basalt ⓘ
mudstone ⓘ
sandstone ⓘ
tuff ⓘ
locatedIn Hebei Province NERFINISHED ⓘ
Inner Mongolia NERFINISHED ⓘ
Liaoning Province NERFINISHED ⓘ
northeastern China ⓘ
notableSite Beipiao area NERFINISHED ⓘ
Sihetun locality NERFINISHED ⓘ
overlies Tuchengzi Formation NERFINISHED ⓘ
paleoclimate seasonal ⓘ
temperate ⓘ
partOf Jehol Group NERFINISHED ⓘ
stratigraphicUnitOf Jehol Biota NERFINISHED ⓘ
underlies Jiufotang 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: Yixian Formation
Description of subject: The Yixian Formation is an Early Cretaceous geological formation in northeastern China renowned for its exceptionally well-preserved fossils, including early mammals, feathered dinosaurs, and primitive birds.

Referenced by (2)

Full triples — surface form annotated when it differs from this entity's canonical label.

Eomaia → fossilSite → Yixian Formation ⓘ
Eomaia → formation → Yixian Formation ⓘ