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One charge of the U.S. Geological Survey’s Energy Resources Science Center is conducting field work to
better understand the distribution of hydrocarbon source rocks as input to USGS oil and gas
assessments. This 2015 image is a view to the south-southeast of rocks exposed along an unnamed
One charge of the U.S. Geological Survey’s Energy Resources Science Center is conducting field work to
better understand the distribution of hydrocarbon source rocks as input to USGS oil and gas
assessments. This 2015 image is a view to the south-southeast of rocks exposed along an unnamed
A helicopter towing a large, cylindrical sensor will make low-level flights over parts of Cedar Rapids, Iowa, as part of a groundwater survey in May 2017.
A helicopter towing a large, cylindrical sensor will make low-level flights over parts of Cedar Rapids, Iowa, as part of a groundwater survey in May 2017.
A helicopter towing a large, cylindrical sensor will make low-level flights over parts of Cedar Rapids, Iowa, as part of a groundwater survey in May 2017.
A helicopter towing a large, cylindrical sensor will make low-level flights over parts of Cedar Rapids, Iowa, as part of a groundwater survey in May 2017.
A helicopter towing a large, cylindrical sensor will make low-level flights over parts of Cedar Rapids, Iowa, as part of a groundwater survey in May 2017.
A helicopter towing a large, cylindrical sensor will make low-level flights over parts of Cedar Rapids, Iowa, as part of a groundwater survey in May 2017.
A helicopter towing a large, cylindrical sensor will make low-level flights over parts of Cedar Rapids, Iowa, as part of a groundwater survey in May 2017.
A helicopter towing a large, cylindrical sensor will make low-level flights over parts of Cedar Rapids, Iowa, as part of a groundwater survey in May 2017.
USGS hydrologic technician measures floodwaters along Flat Creek near Jenkins, Missouri using an Acoustic Doppler Current Profiling instrument.
USGS hydrologic technician measures floodwaters along Flat Creek near Jenkins, Missouri using an Acoustic Doppler Current Profiling instrument.
USGS hydrologic technician Christopher Rowden verifies the accuracy of streamgage information at the Jacks Fork River at Eminence, Missouri.
USGS hydrologic technician Christopher Rowden verifies the accuracy of streamgage information at the Jacks Fork River at Eminence, Missouri.
Images from Landsat 8's Operational Land Imager sensor show the dramatic transformation of the river as it flows toward Cedar Rapids. On July 8, 2016, the shallow river meanders into the city, surrounded by green crops in the heart of the growing season.
Images from Landsat 8's Operational Land Imager sensor show the dramatic transformation of the river as it flows toward Cedar Rapids. On July 8, 2016, the shallow river meanders into the city, surrounded by green crops in the heart of the growing season.
A corn farm in northeast Iowa. A new USGS report shows that drought periods followed by rainfall caused nitrate levels to increase to the highest ever measured in some Midwest streams during a 2013 study.
A corn farm in northeast Iowa. A new USGS report shows that drought periods followed by rainfall caused nitrate levels to increase to the highest ever measured in some Midwest streams during a 2013 study.
Photo of the Stan Musial bridge in St. Louis, Missouri.
Photo of the Stan Musial bridge in St. Louis, Missouri.
View of Old Mans Creek near Iowa City, Iowa upstream from a bridge used for collecting water-quality samples (USGS Site ID: 05455100).
View of Old Mans Creek near Iowa City, Iowa upstream from a bridge used for collecting water-quality samples (USGS Site ID: 05455100).
USGS scientist Chris Rowden drives a research vessel measuring streamflow alongside another field crew on the Mississippi River at St. Louis.
USGS scientist Chris Rowden drives a research vessel measuring streamflow alongside another field crew on the Mississippi River at St. Louis.
USGS scientists Chris Rowden, Larry Buschmann and Bob Holmes were on the Mississippi River at St. Louis taking streamflow measurements on New Years Eve, 2015. This information is critical to the National Weather Service, the U.S. Army Corps of Engineers and emergency managers in making flood predictions and response.
USGS scientists Chris Rowden, Larry Buschmann and Bob Holmes were on the Mississippi River at St. Louis taking streamflow measurements on New Years Eve, 2015. This information is critical to the National Weather Service, the U.S. Army Corps of Engineers and emergency managers in making flood predictions and response.
USGS crews had two research vessels out measuring streamflow on the Mississippi River at St. Louis on New Years Eve, 2015. USGS scientists Eric Looper and Jason Carron are one of many USGS field crews out in the floodwaters over the holiday.
USGS crews had two research vessels out measuring streamflow on the Mississippi River at St. Louis on New Years Eve, 2015. USGS scientists Eric Looper and Jason Carron are one of many USGS field crews out in the floodwaters over the holiday.
USGS scientists Chris Rowden, Larry Buschmann and Bob Holmes were on the Mississippi River at St. Louis taking streamflow measurements on New Years Eve, 2015. This information is critical to the National Weather Service, the U.S. Army Corps of Engineers and emergency managers in making flood predictions and response.
USGS scientists Chris Rowden, Larry Buschmann and Bob Holmes were on the Mississippi River at St. Louis taking streamflow measurements on New Years Eve, 2015. This information is critical to the National Weather Service, the U.S. Army Corps of Engineers and emergency managers in making flood predictions and response.
USGS crews had two research vessels out measuring streamflow on the Mississippi River at St. Louis on New Years Eve, 2015.
USGS crews had two research vessels out measuring streamflow on the Mississippi River at St. Louis on New Years Eve, 2015.
USGS scientist Chris Rowden drives a research vessel measuring streamflow alongside another field crew on the Mississippi River at St. Louis.
USGS scientist Chris Rowden drives a research vessel measuring streamflow alongside another field crew on the Mississippi River at St. Louis.
The R/V Sturgeon setting sail from the Navy Pier in Chicago, IL on its fall survey of Lake Michigan. The Sturgeon is based in Cheboygan, MI at the Cheboygan Vessel Base.
The R/V Sturgeon setting sail from the Navy Pier in Chicago, IL on its fall survey of Lake Michigan. The Sturgeon is based in Cheboygan, MI at the Cheboygan Vessel Base.
Flooding conditions at USGS streamgage 06485500, Big Sioux River at Arkon, Iowa, on March 17, 2010. Daily mean streamflow on this date was more than 30,000 cubic feet per second.
Flooding conditions at USGS streamgage 06485500, Big Sioux River at Arkon, Iowa, on March 17, 2010. Daily mean streamflow on this date was more than 30,000 cubic feet per second.
U.S. Geological Survey hydrologic technician measuring streamflow at the Big Sioux River at Arkon, Iowa, on March 17, 2010, during flooding conditions.
U.S. Geological Survey hydrologic technician measuring streamflow at the Big Sioux River at Arkon, Iowa, on March 17, 2010, during flooding conditions.
Views, looking west, to downtown Decorah, Iowa, from a city park bluff on east side of town. Downtown courthouse tower and church spires are prominent.
Views, looking west, to downtown Decorah, Iowa, from a city park bluff on east side of town. Downtown courthouse tower and church spires are prominent.