Is mount rainier a top-down or bottom-up

Mount Rainier (in English: Mount Rainier) ? (in lushootseed: Tahoma) [5] is a stratovolcano located in Pierce County, 87 km southeast of the city of Seattle, Washington, in the United States. It is the most prominent mountain in the continental United States and the Cascada volcanic belt and is the highest peak in the Cascade Range, with a height of 4392 meters above sea level. [1] [2] Mount is considered one of the most dangerous volcanoes in the world and is on the list of the Volcanoes of the Decade. [6] Due to its large amount of glacier ice, the mountain can produce massive lahars that would endanger all the Puyallup river valley. [7]