Initial Reports Volume 187 Chapter 7, Table T2. Rock samples incubated for enrichment cultures and prepared for DNA analysis and electron microscope studies and microspheres evaluated for contamination studies. Notes: * = microcosm for iron and sulfur (Fe/S) or manganese (Mn) redox cycles; SEM = scanning electron microscope; TEM = transmission electron microscopy; ** = contamination test; X = samples prepared on board. Depth Sample Enrichment cultures DNA analysis SEM/TEM samples Microspheres** Core (mbsf) type Anaerobic Aerobic Microcosm* High pressure Wash Fixed Air dried Exterior Interior 187-1156A- 3R 124.6-129.6 Chilled margin 1 1 1 Mn X X X X Yes Yes 187-1156B- 2R 181.6-187.4 Chilled margin 9 3 1 Mn + 1 Fe/S X X X X Yes Yes 5R 205.9-210.2 Fine-grained basalt 9 3 X X X X 6R 210.2-215.2 Chilled margin 5 3 1 Fe/S X X X X