Concept:Shield volcanoes are built by numerous thin, fluid lava flows that accumulate over long periods, forming broad, gently sloping structures.
Explanation:The question describes individual lava flows that are only a few feet thick, but repeated flows over time build up a volcano.
This matches the formation of shield volcanoes.
Shield volcanoes are composed almost entirely of thin layers of basaltic lava with low viscosity.
Each flow spreads easily over a wide area, creating gentle upper slopes of about
5∘ and slightly steeper lower slopes of about
10∘.
Over time, many such flows pile up to form a large, broad volcano that can reach great heights and widths.
The lava flows are generally of similar composition, and very little pyroclastic material is present.
In contrast, composite volcanoes (stratovolcanoes) consist of alternating layers of lava and pyroclastic material, and cinder cone volcanoes are steep and made of loose cinders.
Thus, the volcano described in the question is a shield volcano.
Answer:Shield volcano.
