Glacier Peak, Washington simplified hazards map showing potential impact area for ground-based hazards during a volcanic event.
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Glacier Peak, WA simplified hazards map
Glacier Peak, Washington simplified hazards map showing potential impact area for ground-based hazards during a volcanic event.
Map showing one-year probability of accumulation of 1 centimeter
Map showing one-year probability of accumulation of 1 centimeter (0.4 inch) or more of tephra from eruptions of volcanoes in the Cascade Range.
By
Natural Hazards Mission Area, Volcano Hazards Program, California Volcano Observatory, Cascades Volcano Observatory, Crater Lake, Glacier Peak, Lassen Volcanic Center, Medicine Lake, Mount Adams, Mount Baker, Mount Hood, Mount Jefferson, Mount Rainier, Mount Shasta, Mount St. Helens, Newberry, Three Sisters
Map showing one-year probability of accumulation of 1 centimeter (0.4 inch) or more of tephra from eruptions of volcanoes in the Cascade Range.
By
Natural Hazards Mission Area, Volcano Hazards Program, California Volcano Observatory, Cascades Volcano Observatory, Crater Lake, Glacier Peak, Lassen Volcanic Center, Medicine Lake, Mount Adams, Mount Baker, Mount Hood, Mount Jefferson, Mount Rainier, Mount Shasta, Mount St. Helens, Newberry, Three Sisters
Glacier Peak volcano viewed from the west, WA.
Glacier Peak volcano viewed from the west, Washington.
Glacier Peak volcano viewed from the west, Washington.
Geologists examining ash layers associated with the Dusty assemblag...
The orange layer just below geologist's hiking pole is the Mazama ash (about 7700 ybp). Below that are glacial deposits. Above the Mazama is about a meter consisting mostly of fine-grained tephras from Glacier Peak, capped by soil and plants. That the tephras sit directly on top of the Mazama indicates that "Dusty" eruptions commenced about 7,000 years ago.
The orange layer just below geologist's hiking pole is the Mazama ash (about 7700 ybp). Below that are glacial deposits. Above the Mazama is about a meter consisting mostly of fine-grained tephras from Glacier Peak, capped by soil and plants. That the tephras sit directly on top of the Mazama indicates that "Dusty" eruptions commenced about 7,000 years ago.
Ice-chilled lava columns at the end of a Glacier Peak lava flow, WA.
Impressive columns like these form along the margins of ice-confined lava flows but usually are eroded off the sides due to continued glacial movement after an eruption ceases. Columns are better preserved at the ends of the flows (this photo) where they are protected somewhat from the ice.
Impressive columns like these form along the margins of ice-confined lava flows but usually are eroded off the sides due to continued glacial movement after an eruption ceases. Columns are better preserved at the ends of the flows (this photo) where they are protected somewhat from the ice.
Eruptions in the Cascade Range during the past 4000 years. USGS GIP 64
Eruptions in the Cascade Range during the past 4000 years. USGS GIP 64
Eruptions in the Cascade Range during the past 4000 years. USGS GIP 64
Glacier Peak volcano, WA, viewed from the east.
Glacier Peak volcano, Washington, viewed from the east.
Glacier Peak volcano, Washington, viewed from the east.
Glacier Peak volcano, WA, viewed from the east.
Glacier Peak volcano, Washington, viewed from the east.
Glacier Peak volcano, Washington, viewed from the east.
Glacier Peak volcano, WA, viewed from the east.
Glacier Peak volcano, Washington, viewed from the east.
Glacier Peak volcano, Washington, viewed from the east.
Summit of Glacier Peak, WA, view toward the east.
Summit of Glacier Peak, Washington, view toward the east.
Summit of Glacier Peak, Washington, view toward the east.
Glacier Peak, northern WA
Glacier Peak is the tallest peak amongst a sea of many mountains in northern Washington.
Glacier Peak is the tallest peak amongst a sea of many mountains in northern Washington.
Upper west face of Glacier Peak, WA.
Upper west face of Glacier Peak, Washington.
Upper west face of Glacier Peak, Washington.
Upper slopes of Glacier Peak, WA.
Upper slopes of Glacier Peak, Washington.
Upper slopes of Glacier Peak, Washington.
Glacier Peak, WA, in prime of summer when much of snow has melted
Glacier Peak, Washington, in the prime of summer when much of the snow has melted from its flanks.
Glacier Peak, Washington, in the prime of summer when much of the snow has melted from its flanks.
Exposed rock ridges are thick Pleistocene lava flows that were conf...
Exposed rock ridges are thick Pleistocene lava flows that were confined between large glaciers. Glacier Peak, Washington, view north.
Exposed rock ridges are thick Pleistocene lava flows that were confined between large glaciers. Glacier Peak, Washington, view north.
Glacier Peak volcano, WA reflected in pond below the Whitechuck Gla...
Glacier Peak volcano, Washington reflected in pond below the Whitechuck Glacier, view from the south in late summer.
Glacier Peak volcano, Washington reflected in pond below the Whitechuck Glacier, view from the south in late summer.
Stratified 275-m (900-ft) thick mid-Holocene pyroclastic flow and l...
Visible relief in the hillside exposure is about 800-900 ft. Dusty assemblage deposit occurred approximately between 5100 and 5500 yr B.P. Magma volume of >5 km3, which is a lot for what was probably one eruptive stage. The source lava dome is gone, apparently having disintegrated entirely during extrusion and subsequent glacial interaction.
Visible relief in the hillside exposure is about 800-900 ft. Dusty assemblage deposit occurred approximately between 5100 and 5500 yr B.P. Magma volume of >5 km3, which is a lot for what was probably one eruptive stage. The source lava dome is gone, apparently having disintegrated entirely during extrusion and subsequent glacial interaction.
Dusty Creek drainage experiences regular lahars. Gamma Ridge Format...
Non-volcanic peaks of the North Cascades lie in the background. Dusty Creek drainage experiences regular lahars. Gamma Ridge Formation are hydrothermally altered rocks on left ridge. Loose pyroclastic fill deposits cap right ridge; Eastern view, Glacier Peak, Washington.
Non-volcanic peaks of the North Cascades lie in the background. Dusty Creek drainage experiences regular lahars. Gamma Ridge Formation are hydrothermally altered rocks on left ridge. Loose pyroclastic fill deposits cap right ridge; Eastern view, Glacier Peak, Washington.