Activity for Mark Hackney‭

Type	On...	Excerpt	Status	Date
Answer	—	A: How to detect a crevasse on a glacier Variations in the appearance of the snow can help detect where crevasses may be. It often helps to get a low angled light perspective such as at dawn or sunset. Depressions in the snow cover may be revealed by a different appearance. Fresh, wind blown snow or dust particles may collect in depressions... (more)	—	over 8 years ago