This University of Washington news article details the work of oceanographer Deborah Kelley regarding microorganisms found in "layer 3" of the ocean crust. These microbes live deep beneath the sea floor and are thought to survive on methane gas trapped in fractures in the crust.
Subject: Biology:Ecology:Habitats:Marine, Biology:Ecology:Metabolism, Habitats:Within Rock, Benthic, Biology:Biogeochemistry, Microbiology Resource Type: Scientific Resources:Overview/Reference Work Grade Level: General Public, College Upper (15-16), Graduate/Professional, College Lower (13-14), High School (9-12), Middle (6-8) Extreme Environments: Anoxic, High Pressure Ocean Environments: Deep Sea Floor/Abyssal:Fracture Zone, Deep Sea Floor/Abyssal Topics: Biosphere:Ecology:Habitats:Benthic, Marine, Within Rock, Biosphere:Biogeochemistry, Ecology:Metabolism, Biosphere:MicrobiologyKeyword: endolith