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Photo ID: hi4opc	Subject: Volcanoes	Description
	Active Volcanoes; Cascade Range; Gases; Geologic Hazards; Measurements; Natural Hazards; Sampling; Stratovolcanoes; Volcanic Features; Volcanic Vents; Volcanism; Volcanology	In this image United States Geological Survey geologists collect gas samples from Mount Saint Helens. Samples were gathered from vents on the dome and crater floor, and were used to monitor changes in chemical composition. Additionally, sulfur dioxide gas was measured from a specially-equipped airplane before, during, and after eruptions to determine "emission rates" for the volcano. During eruptions, emission rates typically increased to 5 to 10 times their pre-eruptive value.
	Photographer	Location
	USGS Credit Line: Courtesy United States Geological Survey	North America; United States; Hawaii; Kilauea Latitude: 0 / Longitude: 0
Photo Quality \| Large	Available for Commercial Use

Photo ID: h57q6f	Subject: Volcanoes	Description
	Composite Volcanoes; Deltas; Deposition; Geologic Hazards; Lakes; Mountains; Plate Tectonics; Snow; Stratovolcanoes; Tectonics; Volcanic Features; Volcanics; Volcanology	Mt. St. Helens and a newly formed delta into Coldwater Lake.
	Photographer	Location
	Marli Miller Credit Line: Copyright © Marli Miller, University of Oregon	North America; United States; Washington; Mount Saint Helens Latitude: 46.18 / Longitude: -122.18
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Photo ID: h57pzt	Subject: Volcanoes	Description
	Active Volcanoes; Calderas; Cascade Range; Craters; Mountains; Plate Tectonics; Stratovolcanoes; Tectonics; Volcanic Features; Volcanology	Cascade volcanoes: Mt. Hood in front, Mt. Adams and Mt. Rainier in the background.
	Photographer	Location
	Marli Miller Credit Line: Copyright © Marli Miller, University of Oregon	North America; United States; Oregon; Mount Hood Latitude: 45.37 / Longitude: -121.69
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Photo ID: h57q42	Subject: Volcanoes	Description
	Composite Volcanoes; Geologic Hazards; Mountains; Plate Tectonics; Snow; Stratovolcanoes; Tectonics; Volcanic Features; Volcanics; Volcanology	View of Mt. Shasta in California.
	Photographer	Location
	Marli Miller Credit Line: Copyright © Marli Miller, University of Oregon	North America; United States; California; Siskiyou County; Mount Shasta Latitude: 41.41 / Longitude: -122.99
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Photo ID: h57q1q	Subject: Volcanoes	Description
	Composite Volcanoes; Geologic Hazards; Mountains; Plate Tectonics; Snow; Stratovolcanoes; Tectonics; Volcanic Features; Volcanics; Volcanology	View of Mount Shasta in California.
	Photographer	Location
	Marli Miller Credit Line: Copyright © Marli Miller, University of Oregon	North America; United States; California; Siskiyou County; Mount Shasta Latitude: 41.41 / Longitude: -122.99
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Photo ID: h57pwa	Subject: Volcanoes	Description
	Calderas; Craters; Dacite; Domes; Geologic Hazards; Igneous Rocks; Intrusions; Mountains; Peaks; Pipes; Plate Tectonics; Plugs; Plutonic Rocks; Rhyolite; Tectonics; Volcanic Features; Volcanic Necks; Volcanic Rocks; Volcanics; Volcanology	Rhyolitic plug dome (dacite) at Lassen Peak.
	Photographer	Location
	Marli Miller Credit Line: Copyright © Marli Miller, University of Oregon	North America; United States; California; Lassen Peak Latitude: 40.48 / Longitude: -121.51
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Photo ID: h57q8c	Subject: Volcanoes	Description
	Active Volcanoes; Calderas; Cascade Range; Composite Volcanoes; Crater; Crater Walls; Geologic Hazards; Stratovolcanoes; Volcanism; Volcanology	Collapsing walls of the crater at Mt. St. Helens
	Photographer	Location
	Marli Miller Credit Line: Copyright © Marli Miller, University of Oregon	North America; United States; Washington; Mount Saint Helens Latitude: 46.18 / Longitude: -122.18
Photo Quality \| Large	Available for Commercial Use

Photo ID: h57qah	Subject: Volcanoes	Description
	Composite Volcanoes; Domes; Geologic Hazards; Lava; Lava Dome; Mountains; Plate Tectonics; Snow; Stratovolcanoes; Tectonics; Volcanic Features; Volcanics; Volcanology	Lava dome at Mt. St. Helens.
	Photographer	Location
	Marli Miller Credit Line: Copyright © Marli Miller, University of Oregon	North America; United States; Washington; Mount Saint Helens Latitude: 46.18 / Longitude: -122.18
Photo Quality \| Large	Available for Commercial Use

Photo ID: h57qce	Subject: Volcanoes	Description
	Caldera; Composite Volcanoes; Crater; Domes; Geologic Hazards; Lava; Lava Dome; Mountains; Plate Tectonics; Stratovolcanoes; Tectonics; Volcanic Features; Volcanics; Volcanology	Mt. St. Helens crater and dome.
	Photographer	Location
	Marli Miller Credit Line: Copyright © Marli Miller, University of Oregon	North America; United States; Washington; Mount Saint Helens Latitude: 46.18 / Longitude: -122.18
Photo Quality \| Large	Available for Commercial Use

Photo ID: h57qed	Subject: Volcanoes	Description
	Caldera; Caldera; Composite Volcanoes; Crater; Crater; Domes; Geologic Hazards; Lava; Lava Dome; Mountains; Plate Tectonics; Stratovolcanoes; Tectonics; Volcanic Features; Volcanics; Volcanology	Mt. St. Helens crater, dome is in the center.
	Photographer	Location
	Marli Miller Credit Line: Copyright © Marli Miller, University of Oregon	North America; United States; Washington; Mount Saint Helens Latitude: 46.18 / Longitude: -122.18
Photo Quality \| Large	Available for Commercial Use

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