From Wood and Kienle (1990): "Devils Desk is a
volcanic neck of a former
stratovolcano now completely surrounded by Hook Glacier. Total relief from the top of Hook Glacier to the top of Devils Desk is ~450 m. Extensive erosion has removed most of the stratovolcano. Three radial dikes (now exposed as ridges) extend outward from the Desk toward the east." Hildreth and others, 2003, state that Devils Desk was active from 292 ka to
Holocene.