Volcanoes are grouped into four types: cinder cones, composite volcanoes, shield volcanoes and lava volcanoes. Cinder cones are circular or oval cones made up of small fragments of lava from a single ...

Katia (right) and Maurice Krafft (left), in blue winter jackets, gaze upon a volcano in the distance as smoke, steam and ash swirl behind them. Credit: Image’Est A new documentary, “Fire of Love,” ...