Question

Which statements accurately describe volcanic landforms? Check all that apply.

A) Batholiths cooled deep inside Earth.
B) Dikes cut across horizontally.
C) A geyser spouts water that is heated deep inside Earth.
D) Dome mountains form from cinder cones.
E) Geysers and hot springs are caused by hydrothermal activity.

Answer 1

A, C, and E.

- A: True — batholiths are large igneous intrusions that crystallize deep in the crust.
- B: False — dikes are typically vertical or steeply inclined intrusions that cut across rock layers; sills are the near-horizontal ones.
- C: True — geysers erupt because groundwater is heated by hot rock/magma below.
- D: False — dome mountains form from uplift/intrusion (e.g., laccoliths) or upwarping, not from cinder cones.
- E: True — geysers and hot springs result from hydrothermal (geothermal) activity.