[willyone]

Crater Lake and Lake Tahoe put Yellowstone to shame in the size dept. Tahoe is a twenty mile by thirty mile caldera which was formed 750,000 years ago when the volcano there blew. It did not just send ash to Nebraska it sent rocks that far. Some debris has been speculated to have actually been blasted into space. Pretty impressive.

[PeaceBeWithYou]

Crater Lake and Lake Tahoe put Yellowstone to shame in the size dept. Tahoe is a twenty mile by thirty mile caldera which was formed 750,000 years ago when the volcano there blew.

Uhhh..No. Yellowstone's Caldera is about 10x the size of Mt. Mazama's, and Tahoe is a basin, not a caldera.

Name	Caldera Size	Volume of erupted material
Yellowstone (.6 my ago)	75km x 45km	~ 1,000 km3
Mt. Mazama (Crater Lake)	7km x 8km	~75 km3
Mt. Pinatubo, Philippines	None	~10 km3
Mt. St. Helens	None	~1-2 km3

Source.

Lake Tahoe: Was formed by faulting that occurred over millions of years as the Sierra Nevada range rose from a shallow sea to the west and the Carson Range rose to the east. Snow, rain, creeks and rivers drained into the basin, forming a lake. The lake level increased until it reached an outlet near the present town of Truckee. Active volcanoes poured lava into the basin, eventually damming the outlet and causing waters to rise several hundred feet higher than Lake Tahoe’s current level. A new outlet was cut just east of one volcano, Mount Pluto, near the present location of Northstar Ski Resort. Source.