Mount Mazama
E86175
Mount Mazama is an ancient stratovolcano in southern Oregon whose massive eruption about 7,700 years ago created the caldera now filled by Crater Lake.
All labels observed (5)
| Label | Occurrences |
|---|---|
| Mount Mazama canonical | 6 |
| Mount Mazama caldera | 2 |
| Caldera of Mount Mazama | 1 |
| Mount Mazama (namesake association within Cascade volcanic arc) | 1 |
| Mount Mazama caldera floor | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T684473 — 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: Mount Mazama Context triple: [Crater Lake, formedInCalderaOf, Mount Mazama]
-
A.
Mount St. Helens
Mount St. Helens is an active stratovolcano in Washington State, USA, best known for its catastrophic 1980 eruption that dramatically reshaped its summit and surrounding landscape.
-
B.
Glacier Peak
Glacier Peak is a glaciated stratovolcano in Washington State, known as one of the major and more remote volcanoes of the Cascade Range.
-
C.
Medicine Lake Volcano
Medicine Lake Volcano is a large, shield-shaped volcano in northeastern California known for its extensive lava flows and location within the Cascade Volcanic Arc.
-
D.
South Sister
South Sister is the highest and youngest of Oregon’s Three Sisters volcanoes, known for its prominent glaciated peak and popular hiking routes.
-
E.
River Calder
The River Calder is a major river in West Yorkshire, England, flowing through several industrial towns before joining the River Aire.
- 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: Mount Mazama Target entity description: Mount Mazama is an ancient stratovolcano in southern Oregon whose massive eruption about 7,700 years ago created the caldera now filled by Crater Lake.
-
A.
Mount St. Helens
Mount St. Helens is an active stratovolcano in Washington State, USA, best known for its catastrophic 1980 eruption that dramatically reshaped its summit and surrounding landscape.
-
B.
Glacier Peak
Glacier Peak is a glaciated stratovolcano in Washington State, known as one of the major and more remote volcanoes of the Cascade Range.
-
C.
Medicine Lake Volcano
Medicine Lake Volcano is a large, shield-shaped volcano in northeastern California known for its extensive lava flows and location within the Cascade Volcanic Arc.
-
D.
South Sister
South Sister is the highest and youngest of Oregon’s Three Sisters volcanoes, known for its prominent glaciated peak and popular hiking routes.
-
E.
River Calder
The River Calder is a major river in West Yorkshire, England, flowing through several industrial towns before joining the River Aire.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
Pleistocene volcano
ⓘ
stratovolcano ⓘ subduction-zone volcano ⓘ |
| ashFallDistribution |
Prairie ecozone
ⓘ
surface form:
Canadian Prairies
Greenland ice cores ⓘ western North America ⓘ |
| calderaDepth | about 1,200 meters ⓘ |
| calderaDiameter | about 8 to 10 kilometers ⓘ |
| composition |
andesitic
ⓘ
dacitic ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| createdFeature |
ash fall deposits
ⓘ
caldera ⓘ ignimbrite sheets ⓘ pyroclastic deposits ⓘ |
| culturalSignificance | sacred landscape to Klamath tribes ⓘ |
| currentTopography | caldera rim ⓘ |
| elevationBeforeCollapse |
about 12,000 feet
ⓘ
about 3,600 meters ⓘ |
| eruptionAge |
Holocene
ⓘ
about 7,700 years ago ⓘ |
| eruptionFormed | Crater Lake ⓘ |
| eruptionImpact | regional climate and ecosystems in the Pacific Northwest ⓘ |
| eruptionType |
Plinian eruption
ⓘ
caldera-forming eruption ⓘ |
| geologicalSetting |
Cascadia Subduction Zone
ⓘ
surface form:
Cascadia subduction zone
|
| hasCaldera |
Crater Lake
ⓘ
surface form:
Crater Lake caldera
|
| hasLakeInCaldera | Crater Lake ⓘ |
| hasSignificance |
major Holocene explosive eruption in North America
ⓘ
source of Mazama ash tephra layer ⓘ |
| lastMajorEruption | about 5,700 BCE ⓘ |
| locatedIn |
Cascade Range
ⓘ
Klamath County, Oregon ⓘ Oregon ⓘ Oregon ⓘ
surface form:
U.S. state of Oregon
southern Oregon ⓘ |
| locatedInProtectedArea | Crater Lake National Park ⓘ |
| namedAfter | Mazamas mountaineering club ⓘ |
| nowContains | Crater Lake ⓘ |
| partOf |
Cascade Volcanic Arc
ⓘ
High Cascades ⓘ |
| protectedArea | Crater Lake National Park ⓘ |
| status | extinct volcano ⓘ |
| studiedBy | United States Geological Survey ⓘ |
| tephraName | Mazama ash ⓘ |
| volcanicExplosivityIndex | 7 ⓘ |
| volcanoType | composite volcano ⓘ |
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: Mount Mazama Description of subject: Mount Mazama is an ancient stratovolcano in southern Oregon whose massive eruption about 7,700 years ago created the caldera now filled by Crater Lake.
Referenced by (11)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Mount Mazama caldera floor
this entity surface form:
Mount Mazama caldera
this entity surface form:
Mount Mazama caldera
this entity surface form:
Mount Mazama (namesake association within Cascade volcanic arc)
this entity surface form:
Caldera of Mount Mazama