Aluminosilicate-rich pelitic schists of the Leech River Complex (Formation) are exposed on southern Vancouver Island, outcropping between the Leech River fault and the San Juan fault in the vicinity of Port Renfrew and Langford. The Leech River Complex, of Jurassic to Cretaceous age, is largely comprised of argillites and metagrey- wackes, with some metavolcanics (Geological Survey of Canada Map 1553A - Muller, 1983).

Metamorphic grade increases from north to south across the complex. The exposed southern one-third to one-half of the complex contains staurolite and andalusite. Within pelitic strata, andalu- site is abundant and may be present as porphyroblasts from 12 to 20 centimetres long (Assessment Report 12642; Rusmore, 1982). Locally, retrograde alteration results in the replacement of andalusite by chlorite and muscovite (Canadian Journal of Earth Sciences 19, pages 1817-1835). Garnet may also be present in these schists in moderate abundance and staurolite has also been observed. Areas of particular note are the Sombrio River and Valentine Mountain vicinities. See also Jordan River (092B 109).