Fountain Formation
E913336
The Fountain Formation is a Pennsylvanian-age sedimentary rock unit in Colorado and adjacent areas, best known for forming the dramatic red sandstone outcrops such as the Flatirons and the rocks at Garden of the Gods.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Fountain Formation canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T11239059 — 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: Fountain Formation Context triple: [Flatirons, geologicalAge, Fountain Formation]
-
A.
Fire and Water Fountain
Fire and Water Fountain is a kinetic sculpture and landmark fountain in Tel Aviv’s Dizengoff Square, known for its colorful, rotating elements and choreographed fire-and-water displays.
-
B.
Beautiful Fountain
Beautiful Fountain is a richly ornamented late-medieval fountain and landmark located in Nuremberg, Germany.
-
C.
Stone Fountain
Stone Fountain is a late Gothic, stone-built public water reservoir and architectural landmark located in the historic Czech town of Kutná Hora.
-
D.
Mancur
Mancur is the given name of Mancur Olson, an influential American economist and social scientist known for his work on collective action and institutional economics.
-
E.
Fountain
Fountain is Marcel Duchamp’s groundbreaking 1917 readymade artwork consisting of a signed porcelain urinal that radically challenged traditional definitions of art.
- 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: Fountain Formation Target entity description: The Fountain Formation is a Pennsylvanian-age sedimentary rock unit in Colorado and adjacent areas, best known for forming the dramatic red sandstone outcrops such as the Flatirons and the rocks at Garden of the Gods.
-
A.
Fire and Water Fountain
Fire and Water Fountain is a kinetic sculpture and landmark fountain in Tel Aviv’s Dizengoff Square, known for its colorful, rotating elements and choreographed fire-and-water displays.
-
B.
Beautiful Fountain
Beautiful Fountain is a richly ornamented late-medieval fountain and landmark located in Nuremberg, Germany.
-
C.
Stone Fountain
Stone Fountain is a late Gothic, stone-built public water reservoir and architectural landmark located in the historic Czech town of Kutná Hora.
-
D.
Mancur
Mancur is the given name of Mancur Olson, an influential American economist and social scientist known for his work on collective action and institutional economics.
-
E.
Fountain
Fountain is Marcel Duchamp’s groundbreaking 1917 readymade artwork consisting of a signed porcelain urinal that radically challenged traditional definitions of art.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
geologic formation
ⓘ
sedimentary rock unit ⓘ |
| ageRange | Late Missourian to Virgilian (late Pennsylvanian) ⓘ |
| cementType | hematite-rich cement ⓘ |
| chronostratigraphicPosition | Pennsylvanian of the Late Paleozoic ⓘ |
| color | red ⓘ |
| contains | arkosic sandstone ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| depositionalEnvironment |
alluvial fan
ⓘ
fluvial ⓘ |
| exposedIn |
Boulder, Colorado area
ⓘ
linked to:
Boulder Valley region
Front Range of Colorado ⓘ
linked to:
Front Range of the Rocky Mountains
Garden of the Gods, Colorado Springs ⓘ
linked to:
Garden of the Gods
Red Rocks Park, Colorado ⓘ |
| formsLandform |
Flatirons
ⓘ
Garden of the Gods monoliths ⓘ
linked to:
Garden of the Gods
Red Rocks amphitheater cliffs ⓘ
linked to:
Red Rocks Park, Colorado
|
| formsPartOf | southern Rocky Mountains geologic framework ⓘ |
| geologicAge | Pennsylvanian ⓘ |
| geologicPeriod |
Carboniferous
ⓘ
linked to:
Carboniferous period
|
| grainSizeRange | from conglomerate to fine sandstone and siltstone ⓘ |
| knownFor |
Flatirons near Boulder, Colorado
ⓘ
linked to:
Flatirons
dramatic red sandstone outcrops ⓘ rock formations at Garden of the Gods ⓘ |
| lithology |
conglomerate
ⓘ
sandstone ⓘ shale ⓘ siltstone ⓘ |
| namedFor |
Fountain, Colorado area
ⓘ
linked to:
Fountain, Colorado
|
| notableFeature |
cross-bedded sandstone
ⓘ
large clast conglomerates near mountain front ⓘ |
| orientationOfMajorOutcrops | steeply dipping hogbacks ⓘ |
| overlies | Precambrian basement rocks in the Front Range ⓘ |
| paleogeography | proximal to uplifted Ancestral Front Range ⓘ |
| partOf | Colorado stratigraphy ⓘ |
| primaryColorCause | iron oxide cement ⓘ |
| region |
Colorado
ⓘ
adjacent areas of the central United States ⓘ |
| sourceArea |
Ancestral Rocky Mountains
ⓘ
linked to:
Ancestral Rocky Mountains orogeny
|
| stratigraphicUnitOf | Ancestral Rocky Mountain basin fill ⓘ |
| subdivisionOfPeriod | Pennsylvanian subperiod ⓘ |
| tectonicSetting | foreland basin adjacent to Ancestral Rockies ⓘ |
| thickness | hundreds of meters ⓘ |
| typeOfSedimentaryRock | clastic ⓘ |
| usedFor | geologic field education in Colorado ⓘ |
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: Fountain Formation Description of subject: The Fountain Formation is a Pennsylvanian-age sedimentary rock unit in Colorado and adjacent areas, best known for forming the dramatic red sandstone outcrops such as the Flatirons and the rocks at Garden of the Gods.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.