GEOLOGY

Detailed explanation-1: -These are formed by lava flows of low viscosity. A volcanic mountain having a broad profile is built up over time by flow after flow of relatively fluid basaltic lava issuing from vents or fissures on the surface of the volcano. Mauna Loa on the Big Island of Hawaii is the best example of a Shield Volcano.

Detailed explanation-2: -Mauna Kea and Mauna Loa are shield volcanoes. They are the world’s largest active volcanoes, rising over 9 km above the sea floor around the island of Hawai’i.

Detailed explanation-3: -Eruption Types and Classification Most shield volcano eruptions are nonexplosive (effusive), usually 0-1 on the Volcanic Explosivity Index (VEI), typically in the Hawaiian eruptive style. These eruptions produce fluid lava flows and may produce fire-fountains.

Detailed explanation-4: -Eruptions at shield volcanoes are only explosive if water somehow gets into the vent, otherwise they are characterized by low-explosivity fountaining that forms cinder cones and spatter cones at the vent, however, 90% of the volcano is lava rather than pyroclastic material.

Detailed explanation-5: -The most well-known types of volcanoes are cinder cones, composite volcanoes (stratovolcanoes), and shield volcanoes.