Mt. Lassen is an example of what type of volcano? Select the one best answer.

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The prompt asks: 'Mt. Lassen is an example of what type of volcano? Select the one best answer.'

First, note that the provided data includes the intended answer as: 'Volcanic dome'.

However, there are no answer options supplied to compare against, so we cannot evaluate alternative choices or discuss why other types might be incorrect based on given alternatives.

Given common geological knowledge, Mt. Lassen (Lassen Peak) is well known as a lava dome—the classic example of a lava-dome volcano formed by viscous magma that piles up near the vent, producing a steep-sided mound rather than a broad shield or stratovolcano profile.

Understanding lava domes involves recognizing that high-viscosity magma traps gas and traps pressure, leading to domed, bulging shapes as magma intrudes and extrudes at the surface in a mound-like form.

If there were multiple options, we would compare volcanic dome against other types such as shield volcanoes (broad, gently sloping formed by low-viscosity basaltic lava), stratovolcanoes (steep-sided, built from alternating layers of lava flows and tephra), cinder cones (small cones built from tephra eruptions), and fissure eruptions (lava flows from long cracks rather than a central vent).

In this case, since the explicit answer is 'Volcanic dome', the key concept is identifying Mt. Lassen as a lava dome structure rather than a shield, stratovolcano, or cinder cone, which aligns with its morphology and eruption history.

GEL 020 001 FQ 2025 Quiz for Lecture 14 (11/12)

Mt. Lassen is an example of what type of volcano? Select the one best answer.

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