Select all of the answers that apply.

Question

Which of the following statements are true?

Volcanoes can form plateaus and lava domes.
Geysers and hot springs occur due to hot, volcanic material inside the earth.
Volcanoes can form mountains and islands.
Batholiths are sills that push up into lens-shaped intrusions.

Answer 1

Let's evaluate each statement:

1. Volcanoes can form plateaus and lava domes. - True. Volcanoes can indeed form extensive lava plateaus (such as the Columbia River Plateau) and lava domes (like those formed by certain volcanoes, such as Mount St. Helens).

2. Geysers and hot springs occur due to hot, volcanic material inside the earth. - True. Geysers and hot springs are typically a result of geothermal activity, which is often associated with volcanic regions. The heat from volcanic materials can heat groundwater, leading to these phenomena.

3. Volcanoes can form mountains and islands. - True. Volcanoes can create mountain ranges (like the Andes in South America) and islands (like the Hawaiian Islands), formed by volcanic activity.

4. Batholiths are sills that push up into lens-shaped intrusions. - False. Batholiths are large masses of igneous rock that have cooled and solidified beneath the Earth's surface, typically forming the core of mountain ranges. They are not sills; sills are horizontal intrusions of igneous rock that form between layers of sedimentary rock.

Based on the above evaluations, the true statements are:

• Volcanoes can form plateaus and lava domes.
• Geysers and hot springs occur due to hot, volcanic material inside the earth.
• Volcanoes can form mountains and islands.