Alaska Volcano Observatory

Pumiceous lapillus handpicked from white pumice and trace porphyry. Sample is heterogeneous and the analysis may not accurately reflect a magmatic composition.

Sample Location:

Great Sitkin

Spurr

+−

The National Map (Topo) The National Map (Imagery) The National Map (Topo + Imagery) The National Map (Shaded Relief)

Elevated Volcanoes Instrumented Volcanoes Uninstrumented Volcanoes Communities Webcams Instruments Earthquakes Geologic Sites

Legend

	Red (Warning)
	Orange (Watch)
	Yellow (Advisory)
	Green (Normal)
	Uninstrumented

30 km

20 mi

Leaflet | U.S. Department of the Interior | U.S. Geological Survey | Policies

References Cited

[1] Heterogeneity, correlatives, and proposed stratigraphic nomenclature of Hayes tephra set H, Alaska, 1994

Riehle, J. R., 1994, Heterogeneity, correlatives, and proposed stratigraphic nomenclature of Hayes tephra set H, Alaska: Quaternary Research, v. 41, n. 3, p. 285-288.

[2] A reconnaissance of the major Holocene tephra deposits in the upper Cook Inlet region, Alaska, 1985

Riehle, J. R., 1985, A reconnaissance of the major Holocene tephra deposits in the upper Cook Inlet region, Alaska: Journal of Volcanology and Geothermal Research, v. 26, n. 1-2, p. 37-74.

USGS Volcano Notification Service
Contact AVO
Privacy
Accessibility
Information Quality
FOIA

This website is supported by the U.S. Geological Survey under Cooperative Agreement Grant G22AC00137 and G23AC00070.

Mention of trade names or commercial products does not constitute their endorsement by the U.S. Geological Survey.