The lava flows from shield volcanoes is primarily of two types, pahoehoe -- pronounced "pah-hoy-hoy" -- and a'a (pronounced "ah-ah," said sharply). Both these types originate from surface eruptions, while a third type, pillow lava, is more likely to form from undersea eruptions.
A shield volcano is a type of volcano usually composed almost entirely of fluid lava flows. It is named for its low profile, resembling a warrior's shield lying on the ground. This is caused by the highly fluid (low viscosity) lava erupted, which travels farther than lava erupted from a stratovolcano, and results in the steady accumulation of broad sheets of lava, building up the shield ...
A shield volcano is the largest type of volcano on Earth, with low viscosity lava flows and a wide broad shape. The low viscosity, runny, nature of the lava means it travels in streams far from the source and covers many square miles. The largest volcano in the entire world, Mauna Loa in Hawaii, is a shield volcano.
Shield volcanoes can vary widely in size, and much smaller Icelandic-type shield volcanoes are common in many volcanic regions. These volcanoes can form during single long-term effusive eruptions. A less common type of shield volcano is a pyroclastic shield, whose broad low-angle slopes are formed by accumulation of fragmental material from ...
The Hawaiian shield volcanoes are the most famous examples. Shield volcanoes are almost exclusively basalt, a type of lava that is very fluid when erupted. For this reason these volcanoes are not steep (you can't pile up a fluid that easily runs downhill).
Credit: B. Chouet/USGS. A volcano on Earth is a vent or fissure in the planet's crust through which lava, ash, rock and gases erupt. A volcano is also a mountain formed by the accumulation of ...
Shield volcanoes, the third type of volcano, are built almost entirely of fluid lava flows. Flow after flow pours out in all directions from a central summit vent, or group of vents, building a broad, gently sloping cone of flat, domical shape, with a profile much like that of a warrior's shield.
There are several different types of volcanoes: steep stratovolcanoes, wide shield volcanoes, and mounded lava domes.The shape of a volcano actually depends on the types of lava that it’s made ...
shield volcano — a type of volcano built entirely or mostly from fluid lava vents. They are named like this because when viewed from above, you can see just how massive and imposing they are ...
A shield volcano is a wide volcano with shallowly-sloping sides. Shield volcanoes are formed by lava flows of low viscosity - lava that flows easily. Consequently, a volcanic mountain having a ...