Also, what type of eruption would this volcano be? (Plinian?)
Eruptions are measured on a scale called the Volcanic Explosivity Index, which is like earthquake magnitudes in that each number represents a tenfold increase in power.
A VEI-4 eruption would be like Mt. Pelee in 1902, where the pyroclastic surge/flow (I forget which) overran and incinerated a town, and Eyjafjallajokull in 2010, which produced huge clouds of ash that closed down European air traffic.
Ten times more powerful than that would be a VEI-5 Eruption. Examples would be Mt. Vesuvius in 79 AD, and Mt. St. Helens in 1980. These are the Plinian eruptions you mentioned.
Ten times more powerful than that would be a VEI-6 Eruption. An example would be Krakatoa in 1883, an eruption that erased an entire island and caused the loudest sound ever to be recorded by humans (the shock wave traveled around the planet three times).
Ten times more powerful than that would be a VEI-7 Eruption. Examples would be the 1620 BC eruption of Thera, which wiped out the Minoan civilization and resulted in the legend of Atlantis, and the 1815 eruption of Tambora, which caused the "Year Without a Summer" and prompted Mary Shelly to write Frankenstein.
Ten times more powerful than that would be a VEI-8 eruption. An example would be the Toba eruption of 74,000 years ago, which almost caused the human race to go extinct, resulting in a genetic bottleneck that is still detectible in our genes today.
Yellowstone is a VEI-8 volcano.