A second volcanic cycle called the "Post-Miocene Formations" or "Latest Series II, III, IV" began three million years ago. This was a much more intense volcanic cycle, which united the Macizo de Teno, Macizo de Anaga and Macizo de Adeje into one island. This new structure, called the "Pre-Cañadas Structure" ("Edificio pre-Cañadas"), would be the foundation for what is called the "Cañadas Structure I". The Cañadas Structure I experienced various collapses and emitted explosive material that produced the area known as "Bandas del sur" (in the present-day south-southeast of Tenerife).