title: Mountain shadow phenomena.
abstract: Regardless of profile, whether flat topped or pointed, to the summit observer all mountain peaks cast triangular shadows when the sun is low. A theory for such anomalous shadows is developed. The shadow apex angle is shown to depend only on the ratio of the breadth of the mountain to its height.
authors.forename: W
authors.initials: W
authors.lastname: Livingston
authors.forename: D
authors.initials: D
authors.lastname: Lynch