Fluid, basic lava flow is likely to give rise to a volcanic

Assessment: JAMB UTME - Geography - 1999 Subject: Geography

Question 1 Report

Fluid, basic lava flow is likely to give rise to a volcanic
Answer Details
Fluid, basic lava flow is likely to give rise to a volcanic shield. A volcanic shield is a broad, gently sloping landform that is created by the accumulation of fluid lava flows. These lava flows are typically composed of basic lava, which has a low viscosity, or resistance to flow, and can travel great distances before solidifying. As the lava flows out of the volcanic vent, it spreads out in all directions, creating a broad, flat shield-shaped landform. Over time, the lava cools and solidifies, creating a new layer of rock. This process is repeated over many years, eventually resulting in the formation of a large, gently sloping volcanic shield. In contrast, a dome is a small, steep-sided volcanic landform that is created by the accumulation of highly viscous lava flows. A cinder cone is a steep-sided hill that is formed from explosive eruptions of ash and lava fragments. A saddle reef, on the other hand, is a type of mineral deposit that is found in geological formations. Therefore, fluid, basic lava flow is most likely to give rise to a volcanic shield.

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