What is a cone shaped volcano that has explosive eruptions and quiet periods when lava flows gently?

A cone-shaped volcano that exhibits explosive eruptions followed by quieter periods of gentle lava flows is known as a stratovolcano, or composite volcano. These volcanoes are characterized by their steep, conical profiles and are formed from alternating layers of solidified lava flows, tephra, and volcanic ash. The explosive eruptions are typically due to the high viscosity of the magma, which can trap gas until it is released violently. Examples of stratovolcanoes include Mount St. Helens and Mount Fuji.