Medicine Lake Volcano Medicine Lake Volcano Medicine Lake Volcano is a large shield volcano in northeastern California about northeast of Mount Shasta. The volcano is located in a zone of east-west crustal extension east of the main axis of the Cascade Volcanic Arc and the Cascade Range. The thick shield is from east to west and from north to south, and covers more than . The underlying rock has downwarped by under the center of the volcano. The volcano is primarily composed of basalt and basaltic andesite lava flows, and has a caldera at the center. The Medicine Lake shield rises about above
Under the Volcano 1984 it served as the basis of a film of the same name. In 1998 the Modern Library ranked "Under the Volcano" at number 11 on its list of the 100 best English-language novels of the 20th century. Lowry had already published one novel, "Ultramarine" (1933), by the time he was working on "Under the Volcano", and in 1936 wrote a short story called "Under the Volcano" containing the kernel of the future novel. That story was not published until the 1960s; passages of it are found also in the account of Sigbjorn Wilderness, found in "Dark as the Grave