The APVC erupted over an area of from ten major systems, some active over millions of years and comparable to Yellowstone Caldera and Long Valley Caldera in the United States. The APVC is the largest ignimbrite province of the Neogene with a volume of at least , and the underlying magmatic body is considered to be the largest continental melt zone, forming a batholith. Alternatively, the body revealed by seismic studies is the remnant mush of the magma accumulation zone. Deposits from the volcanoes cover a surface area of more than . La Pacana is the largest single complex in the APVC with dimensions , including the caldera.