Strombolian Explosive Eruptions
- Bomb crust of bread: fragment of vesiculated magma, thrown near the eruptive mouth. Because of its size greater than 6 cm, it is called a bomb. Its bread crust appearance derives from the fact that, after being emitted, the gas inside it continued to expand and split its surface (already partly cooled), just like a loaf of bread in the oven.
- Agglutinated spatter: shreds of lava thrown near the mouth of a cone of slag still hot and plastic to the point of being welded one on top of the other to form a compact rock. In the sample you can still see the individual fragments crushed and welded one on top of the other.
- Scoriaceous Lapillus: scoriaceous fragments of less than 6 cm in size, vesiculated due to the presence of magmatic gases inside them. They were emitted during the activity of throwing from a cone of slag and accumulated near the eruptive mouth, mostly following ballistic trajectories and partly moved by the wind.
- Scoriaceous bombs: scoriaceous fragments larger than 6 cm, vesicles due to the presence of magmatic gases inside them. They were emitted during the activity of throwing from a cone of slag and accumulated near the eruptive mouth, mostly following ballistic trajectories.
- Throwing slag: a generic term for fragments of slag of varying sizes, little blistered and thrown near the eruptive mouth following mostly ballistic trajectories.