[20]GeologyThe mountains of K2 and Broad Peak, and the area westward to the lower reaches of Sarpo Laggo glacier consist of metamorphic rocks, known as the K2 Gneiss and part of the Karakroam Metamorphic Complex. On the west face of Broad Peak and south spur of K2, lamprophyre dikes, which consist of clinopyroxene and biotite-porphyritic vogesites and minettes, have intruded the K2 gneiss. For example, a fault separates the K2 gneiss of the east face of K2 from limestones and slates comprising nearby Skyang Kangri. In 2004 the Spanish climber Carlos Soria Fontán became the oldest person ever to summit K2, at the age of 65. FilmsK2 (1991)(1991) Vertical Limit (2000)(2000) K2: Siren of the Himalayas (2012)(2012) The Summit (2012)Disasters1986 K2 disaster1995 K2 disaster2008 K2 disasterSee alsoNotes and referencesBibliography