Shield Volcanoes – Volcanoes that are found on constructive plate margins
The shield that the Vulcan (shield volcano) used was easy to construct – you just cut out a plate and paint the margins (constructive plate margins).
Shield volcanoes happen on constructive plate margins. This is where two plates move away from each other. A shield volcano has these characteristics:
- Basic lava, which is non-acidic and very runny (low viscosity)
- Gently sloping sides, because the lava flows for long distances before it solidifies
- No layers, because the volcano consists of lava only
- Less violent eruptions
- Usually shorter periods between eruptions