Shield volcano are cave-like volcanic straights formed by the hardening of overlaying lava. These structures help further the propagation of lava, as the walls of the tube insulates the lava within. Lava tubes can account for a large portion of shield volcano activity; for example, an estimated 58% of the lava forming Kīlauea comes from lava tubes. In some shield volcano eruptions, basaltic lava pours out of a long fissure instead of a central vent, and shrouds the countryside with a long band of volcanic material in the form of a broad plateau. Plateaus of this type exist in Iceland, Washington, Oregon,
Under the Volcano (film) England. There are two documentaries about the making of the Huston film: Gary Conklin's 56-minute "Notes from Under the Volcano" and the 82-minute "Observations Under the Volcano", directed by Christian Blackwood. Under the Volcano (film) Under the Volcano is a 1984 film directed by John Huston, written by Guy Gallo, and starring Albert Finney, Jacqueline Bisset, Anthony Andrews, and Katy Jurado. The film received Academy Award nominations for Best Actor in a Leading Role (Albert Finney) and Best Original Score (Alex North). It is based on the semi-autobiographical 1947 novel by English writer Malcolm Lowry. The film tells the story