Mount Mazama

E86175

Pleistocene volcano stratovolcano subduction-zone volcano

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.

Jump to: Surface forms Statements Referenced by

Observed surface forms (2)

Surface form	Occurrences
Mount Mazama caldera	1
Mount Mazama caldera floor	1

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 NERFINISHED ⓘ 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 ⓘ

Referenced by (3)

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

Crater Lake → formedInCalderaOf → Mount Mazama ⓘ

Crater Lake National Park → hasPart → Mount Mazama ⓘ

this entity surface form: Mount Mazama caldera

Crater Lake → locatedOn → Mount Mazama ⓘ

this entity surface form: Mount Mazama caldera floor