Assertion: new vent | /r/CapableOf | spread across mist park areas
Facets:
value: from cinder cones
type: LOCATION
Source sentences:
text: At about 105,000 years ago new vents opened on the lower northwest flank and lava flows of basaltic andesite (hotter, more fluid magmas than typical for Mount Rainier) spread across the Spray Park and Mist Park areas from cinder cones preserved as Echo and Observation Rocks.