Hannegan caldera
id:
hannegan-caldera-293-860180
title:
Hannegan caldera
text:
Hannegan caldera is a 3.72 million year old volcanic collapse structure in the North Cascades of the U.S. state of Washington. The caldera collapsed during two separate volcanic eruptions that produced as much as 140 km3 of rhyolite ash. The caldera is filled with 55-60 km3 of tuff consisting of ignimbrite, wall-rock breccia, and post-caldera sedimentary rocks. Rocks filling the caldera are lumped into a stratigraphic unit called the Hannegan volcanics. This geologic unit is subdivided into the
brand slug:
wiki
category slug:
encyclopedia
description:
Geologic caldera in Washington (state)
original url:
https://en.wikipedia.org/wiki/Hannegan_caldera
date created:
date modified:
2023-12-11T13:38:01Z
main entity:
{"identifier":"Q115858047","url":"https://www.wikidata.org/entity/Q115858047"}
image:
{"content_url":"https://upload.wikimedia.org/wikipedia/commons/9/9e/Hannegan_Pk_south_face.jpg","width":2182,"height":2182}
fields total:
13
integrity:
15