Despite the haze of smoke from wildfires, visitors enjoy the beach in Santa Barbara, California.
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Wildfire Haze Over Santa Barbara
Despite the haze of smoke from wildfires, visitors enjoy the beach in Santa Barbara, California.
Glacier Peak volcano, WA, viewed from the east.
Glacier Peak volcano, Washington, viewed from the east.
Glacier Peak volcano, Washington, viewed from the east.
Test Well, East River
USGS test well 10 34h363 in the East River, Brunswick, Ga. The U.S. Geological Survey drilled this test well in the early 1970's and at the time it was on the edge of the marsh at Andrews Island. It is now only accessible by boat or canoe at high tide. Despite being surrounded by saltwater the artesian well flows very fresh water from the Upper Floridan Aquifer.
USGS test well 10 34h363 in the East River, Brunswick, Ga. The U.S. Geological Survey drilled this test well in the early 1970's and at the time it was on the edge of the marsh at Andrews Island. It is now only accessible by boat or canoe at high tide. Despite being surrounded by saltwater the artesian well flows very fresh water from the Upper Floridan Aquifer.
Kelp Greenling Among Seafloor Cover of Mixed Composition
Digital still photograph offshore of Half Moon Bay, California, showing a kelp greenling, encrusting sponges, red algae, cup coral, in mixed gravel, cobbles, and rugose rock outcrop with scattered shells at a depth of 9 meters.
Digital still photograph offshore of Half Moon Bay, California, showing a kelp greenling, encrusting sponges, red algae, cup coral, in mixed gravel, cobbles, and rugose rock outcrop with scattered shells at a depth of 9 meters.
Slicing a core of lake sediment
Sediment cores from lakes and reservoirs can be used to reconstruct contaminant histories in watersheds. Sediment-core analyses indicate that concentrations of PAHs in many U.S. urban lakes are increasing, and multiple lines of evidence indicate that the source of the PAHs in coal-tar-based pavement sealants.
Sediment cores from lakes and reservoirs can be used to reconstruct contaminant histories in watersheds. Sediment-core analyses indicate that concentrations of PAHs in many U.S. urban lakes are increasing, and multiple lines of evidence indicate that the source of the PAHs in coal-tar-based pavement sealants.
Chesapeake Bay coast at St. Michaels, Maryland
Chesapeake Bay coast at St. Michaels, Maryland
Chesapeake Bay coast at St. Michaels, Maryland
Driveway with black sealcoat
Many homeowners have their driveway sealcoat to protect and beautify the underlying asphalt. Coal-tar-based sealcoat, predominantly used east of the Continental Divide, is a potent source of polycyclic aromatic hydrocarbons (PAHs). Read more about coal-tar-based sealcoat and PAHs here.
Many homeowners have their driveway sealcoat to protect and beautify the underlying asphalt. Coal-tar-based sealcoat, predominantly used east of the Continental Divide, is a potent source of polycyclic aromatic hydrocarbons (PAHs). Read more about coal-tar-based sealcoat and PAHs here.
Dust swept from coal-tar-sealed parking lot pavement
Dust swept from parking lots sealed with coal-tar-based sealant contains concentrations of polycyclic aromatic hydrocarbons (PAHs) about 1,000 higher than dust from parking lots with other surface types (concrete, unsealed asphalt, asphalt-based sealcoat).
Dust swept from parking lots sealed with coal-tar-based sealant contains concentrations of polycyclic aromatic hydrocarbons (PAHs) about 1,000 higher than dust from parking lots with other surface types (concrete, unsealed asphalt, asphalt-based sealcoat).
Glacier Peak volcano, WA, viewed from the east.
Glacier Peak volcano, Washington, viewed from the east.
Glacier Peak volcano, Washington, viewed from the east.
Great Egret Fishing
Birds found in and around the Salton Sea, California.
Birds found in and around the Salton Sea, California.
PubTalk 7/2007 — Plate Tectonics in Action
Exploring the Earth with the new edition of This Dynamic Planet map and Web site
By Robert Tilling, Volcanologist, and Stephen Kirby, Earthquake Geophysicist
Exploring the Earth with the new edition of This Dynamic Planet map and Web site
By Robert Tilling, Volcanologist, and Stephen Kirby, Earthquake Geophysicist
Solar-Powered Streamgage
Solar-powered streamage on Lackawaxen River, PA supports Lake Wallenpaupack hydropower facility.
Solar-powered streamage on Lackawaxen River, PA supports Lake Wallenpaupack hydropower facility.
Collapse and refilling of Pu‘u ‘Ō‘ō crater
(June 10 to July 25, 2007) During June 17–19, 2007, an intrusion into Kīlauea's upper east rift zone (Episode 56) led to the cessation of eruptive activity at Pu‘u ‘Ō‘ō and the collapse of the Pu‘u ‘Ō‘ō crater floor (Poland and others, 2008).
(June 10 to July 25, 2007) During June 17–19, 2007, an intrusion into Kīlauea's upper east rift zone (Episode 56) led to the cessation of eruptive activity at Pu‘u ‘Ō‘ō and the collapse of the Pu‘u ‘Ō‘ō crater floor (Poland and others, 2008).
Wood Storks
Birds found in and around the Salton Sea, California.
Birds found in and around the Salton Sea, California.
Wood Storks
Birds found in and around the Salton Sea, California.
Birds found in and around the Salton Sea, California.
Wood Storks
Birds found in and around the Salton Sea, California.
Birds found in and around the Salton Sea, California.
Palila opens māmane pods with its strong bill
Palila possess large, strong bills which help them crush open māmane seed pods, their diet of choice. One of the many threats to palila was loss of habitat and their number one food source, māmane.
Palila possess large, strong bills which help them crush open māmane seed pods, their diet of choice. One of the many threats to palila was loss of habitat and their number one food source, māmane.
Center pivot irrigation system watering a cornfield in Arizona
Center pivot irrigation system watering a cornfield in Arizona
Center pivot irrigation system watering a cornfield in Arizona
Eroding bluffs along Alaska’s Arctic coast
Eroding bluffs along Alaska’s Arctic coast. Note light permafrost in bluff face, below top few feet of soil and vegetation.
Eroding bluffs along Alaska’s Arctic coast. Note light permafrost in bluff face, below top few feet of soil and vegetation.
Black Skimmer
Birds found in and around the Salton Sea, California.
Birds found in and around the Salton Sea, California.
Black Skimmer
Birds found in and around the Salton Sea, California.
Birds found in and around the Salton Sea, California.