Capulin's conical form rises more then 1300 feet above the surrounding plains to approximately 8,182 feet above sea level. The mountain consists chiefly of loose cinders,ash, and other rock debris that where spewed out in the eruptions. The symmetry of Capulin volcano was preserved because the lava did not flow from the main crater but a "boca"( Spanish for mouth) located at the western base of the volcano. After the eruptions ceased, vegetation gained a foothold on the steep and unstable slopes stabilizing it and eventually forming dense root growth which transformed the volcanic rock to soil.