Images

In 2010, USGS researcher Brian Edwards recovers white chunks of gas hydrate (methane ice) mixed with gray sediment from a metal core sample tube retrieved from the seafloor in the Arctic Ocean at a water depth of approximately 8,000 feet.

Red mangrove trees fringe the shoreline of a bay in Hurricane Hole.

Scientists at the USGS St. Petersburg Coastal and Marine Science Center study coral reef ecosystems. This coral, Orbicella annularis, was photographed in the Florida Keys during field work on coral disease. 

Cross section of a hydrothermal vent chimney from East Diamante Caldera in the Mariana volcanic arc, west Pacific Ocean, collected during a 2010 research cruise. Most of the sample is zinc sulfide.

Cross section of a hydrothermal vent chimney from East Diamante Caldera in the Mariana volcanic arc, west Pacific Ocean, collected during a 2010 research cruise. Most of the sample is zinc sulfide.

Sandra Brosnahan (USGS) collecting water samples (Long Island, NY).

Photo of researchers starting to take subcores from the giant box core

John Pohlman (USGS, left) and colleagues from the University of Alaska Fairbanks examine a sediment core retrieved through winter ice from the bottom of a lake in northern Alaska. Such cores are used to reconstruct methane emissions and climate history over the past 20,000 years.

Photo of subcore tubes inserted into mud before they are removed.

Photo of researchers positioning giant box core in hoist on deck of the research vessel

Photo of researchers opening hoist, showing giant box core, on deck of the research vessel

Photo of researchers looking at mud in the giant box core before beginning to take subcores

Photo of researchers looking at mud in the giant box core before beginning to take subcores

Photograph of 6" and 4" subcores sampled from a giant box core.

Photograph of planktic foraminifers collected from the sediment trap. Magnified 255x.

Bluff erosion during the 2009–10 El Niño undermined the Great Highway guardrail at Ocean Beach, San Francisco, California. The shoreline eroded, on average, 55 meters that winter, leading to lane closures on the highway and an emergency $5-million revetment along the base of this bluff.

Bluff erosion during the 2009–10 El Niño undermined the Great Highway guardrail at the southern end of Ocean Beach, San Francisco, California. The shoreline eroded, on average, 55 meters that winter, leading to lane closures on the highway and an emergency $5-million revetment along the base of this bluff. Photo taken by Jeff Hansen, USGS, 20 January 2010.

Map of the North American - Caribbean tectonic plate boundary. Colors denote depth below sea level and elevation on land. Bold numbers are the years of moderately large (larger than about M7) historical earthquakes written next to their approximate location. Asterisk - Location of the January 12, 2010 earthquake.

Severe bluff erosion, along the southern end of Ocean Beach, San Francisco, California, including damage to the guard rail of the Great Highway (Calif. Hwy.1). The severe winter erosion led to lane closures of the highway and an emergency, $5 million revetment along the base of this bluff.

Severe coastal bluff erosion, along the southern end of Ocean Beach, San Francisco, California. This storm damage occurred during the 2009-2010 El Niño, which, on average, eroded the shoreline 55 meters that winter.

Rossfelder electric vibracore system deployed from the R/V Gilbert. 

From Vibracore, Radiocarbon, Microfossil, and Grain-Size Data from Apalachicola Bay, Florida, U.S. Geological Survey Open-File Report 2009-1031