http://gallery.usgs.gov/images/logos/usgs_only.jpg http://gallery.usgs.gov/ en-us OC_Web@usgs.gov (Office of Communications Web Group) http://gallery.usgs.gov/images/USGS.gif http://gallery.usgs.gov/ http://gallery.usgs.gov/photos/08_09_2012_nri7Lxw3KF_08_09_2012_0 Water samples using a CTD rosette were taken down to  4,600m in the Canadian Basin in order to investigate ocean acidification.  The water was analyzed shipboard for pH using a spectrophotometer.

]]> http://gallery.usgs.gov/photos/08_09_2012_nri7Lxw3KF_08_09_2012_1 Water samples using a CTD rosette were taken down to  4,600m in the Canadian Basin in order to investigate ocean acidification.  The water was analyzed shipboard for pH using a spectrophotometer.

]]> http://gallery.usgs.gov/photos/08_09_2012_nri7Lxw3KF_08_09_2012_2 Water samples using a CTD rosette were taken down to  4,600m in the Canadian Basin in order to investigate ocean acidification.  The water was analyzed shipboard for pH using a spectrophotometer.

]]> http://gallery.usgs.gov/photos/08_09_2012_nri7Lxw3KF_08_09_2012_3 Water samples using a CTD rosette were taken down to  4,600m in the Canadian Basin in order to investigate ocean acidification.  The water was analyzed shipboard for pH using a spectrophotometer.

]]> http://gallery.usgs.gov/photos/08_09_2012_nri7Lxw3KF_08_09_2012_4 Water samples using a CTD rosette were taken down to  4,600m in the Canadian Basin in order to investigate ocean acidification.  Water samples were collected from each of the bottles and analyzed shipboard.

]]> http://gallery.usgs.gov/photos/09_19_2011_yETg83Jwv6_09_19_2011_0 OFF THE LOUISIANA COAST — A controlled burn of oil from the Deepwater Horizon/BP oil spill sends towers of fire hundreds of feet into the air over the Gulf of Mexico. U.S. Coast Guard Photo by Petty Officer First Class John Masson.

]]> http://gallery.usgs.gov/photos/09_19_2011_yETg83Jwv6_09_19_2011_2 NEW ORLEANS — Fire boat response crews battle the blazing remnants of the off shore oilrig Deepwater Horizon. A Coast Guard MH-65C dolphin rescue helicopter and crew document the fire aboard the mobile offshore drilling unit Deepwater Horizon, while searching for survivors. Multiple Coast Guard helicopters, planes, and cutters responded to rescue the Deepwater Horizon's 126 person crew. (U.S. Coast Guard photo)

]]> http://gallery.usgs.gov/photos/02_19_2010_nSJu48Xlk2_02_19_2010_0 http://gallery.usgs.gov/photos/02_19_2010_nSJu48Xlk2_02_19_2010_1 http://gallery.usgs.gov/photos/02_19_2010_nSJu48Xlk2_02_19_2010_2 http://gallery.usgs.gov/photos/02_19_2010_nSJu48Xlk2_02_19_2010_3 http://gallery.usgs.gov/photos/02_19_2010_nSJu48Xlk2_02_19_2010_4 http://gallery.usgs.gov/photos/02_19_2010_nSJu48Xlk2_02_19_2010_5 http://gallery.usgs.gov/photos/02_19_2010_nSJu48Xlk2_02_19_2010_6 http://gallery.usgs.gov/photos/02_19_2010_nSJu48Xlk2_02_19_2010_7 http://gallery.usgs.gov/photos/02_19_2010_nSJu48Xlk2_02_19_2010_8 http://gallery.usgs.gov/photos/02_19_2010_nSJu48Xlk2_02_19_2010_9 http://gallery.usgs.gov/photos/02_19_2010_nSJu48Xlk2_02_19_2010_10 http://gallery.usgs.gov/photos/02_19_2010_nSJu48Xlk2_02_19_2010_11 http://gallery.usgs.gov/photos/02_19_2010_nSJu48Xlk2_02_19_2010_12 http://gallery.usgs.gov/photos/02_19_2010_nSJu48Xlk2_02_19_2010_13 http://gallery.usgs.gov/photos/02_19_2010_nSJu48Xlk2_02_19_2010_14 http://gallery.usgs.gov/photos/02_19_2010_nSJu48Xlk2_02_19_2010_15 http://gallery.usgs.gov/photos/02_19_2010_nSJu48Xlk2_02_19_2010_16 http://gallery.usgs.gov/photos/02_19_2010_nSJu48Xlk2_02_19_2010_17