prize9-8, Exercise 3: The four landscape questions (sample: a glacial valley)

Model answer (check the details):

1. Rocks: resistant metamorphic and igneous rock forms the high ground; softer rock along the valley floor.
2. Arrangement: the valley follows a fault line, giving a straight course.
3. Surface processes: U-shaped cross-section, hanging valleys and a corrie at the head show glacial erosion, with a river now running through it.
4. Age and setting: the rocks date from an old mountain belt made when plates collided; the shaping by ice is much younger, within the last two million years.

Least sure: the exact age of the rocks and whether the fault is the reason for the valley, which a geological map would help settle.

Care: say which statements are observations and which are interpretations.