Given the task definition and input, reply with output. Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.

Question: What are large glaciers that cover a larger area than just a valley? Answer: ice caps
Ice caps are large glaciers that cover a larger area than just a valley. An ice cap can bury an entire mountain range or region ( Figure below ). Glaciers come off of ice caps into valleys.