Natural Oil Seeps
From Oceanus Magazine

April 25, 2010
Undersea Asphalt Volcanoes Discovered
Erupting oil paved the seafloor with mysterious mounds

May 14, 2009
While Oil Gently Seeps from the Seafloor
Oil naturally leaking into the ocean offers a 'laboratory' to study accidential spills

June 23, 2004
Mixing Oil and Water
Tracking the sources and impacts of oil pollution in the marine environment