Orange and black materials are iron-oxide and manganese encrusted microbial mats, respectively.

Orange and black materials are iron-oxide and manganese encrusted microbial mats, respectively. Image courtesy of Submarine Ring of Fire 2012: NE Lau Basin, NOAA-OER.

Related Links

Submarine Ring of Fire 2012: Daily Updates

Submarine Ring of Fire 2012: NE Lau Basin

NOAA Ocean Explorer Gallery