Rocas Alijos

This text provides a description of the site, Rocas Alijos, which is the top of a remnant oceanic volcano 180 nautical miles off Baja California. It presents extensive details on the observations made during two major expeditions in 1990 and 1993, including the history, rocks, water, soil and biota. The site is highly significant for biogeographical studies, lying at the boundary between major provinces. It also provides ready access to dating the vulcanism of the region. The volume integrates the various observations into a single picture of the site. It is intended for researchers concerned with the Eastern Pacific, and for persons involved in the planning of expeditions, resource management, or long-term trends in environmental conditions.