Iliamna geologic, topographic, and location maps, as well as references that are classified as maps or that contain maps.

Schaefer, Janet, and Nye, C. J., 2002, Historically active volcanoes of the Aleutian Arc: Alaska Division of Geological & Geophysical Surveys Miscellaneous Publication MP 0123, unpaged, 1 sheet, scale 1:3,000,000.
MrSID map sheet : 3.3 MB
page-size PDF : 700 KB
poster-size PDF : 4.87 MB

"Iliamna Volcano is a 3,053-meter-high, ice- and snow-covered stratovolcano in the southwestern Cook Inlet region about 225 kilometers southwest of Anchorage and about 100 kilometers northwest of Homer. Historical eruptions of Iliamna Volcano have not been positively documented; however, the volcano regularly emits steam and gas, and small, shallow earthquakes are often detected beneath the summit area. The most recent eruptions of the volcano occurred about 300 years ago, and possibly as recently as 90-140 years ago. Prehistoric eruptions have generated plumes of volcanic ash, pyroclastic flows, and lahars that extended to the volcano flanks and beyond. Rock avalanches from the summit area have occurred numerous times in the past. These avalanches flowed several kilometers down the flanks and at least two large avalanches transformed to cohesive lahars. The number and distribution of known volcanic ash deposits from Iliamna Volcano indicate that volcanic ash clouds from prehistoric eruptions were significantly less voluminous and probably less common relative to ash clouds generated by eruptions of other Cook Inlet volcanoes. Plumes of volcanic ash from Iliamna Volcano would be a major hazard to jet aircraft using Anchorage International Airport and other local airports, and depending on wind direction, could drift at least as far as the Kenai Peninsula and beyond. Ashfall from future eruptions could disrupt oil and gas operations and shipping activities in Cook Inlet. Because Iliamna Volcano has not erupted for several hundred years, a future eruption could involve significant amounts of ice and snow that could lead to the formation of large lahars and downstream flooding."

Waythomas, C. F., and Miller, T. P., 1999, Preliminary volcano-hazard assessment for Iliamna Volcano, Alaska: U.S. Geological Survey Open-File Report OF 99-0373, 31 p., 1 sheet, scale unknown.
full-text PDF : 2.84 MB
map sheet plate : 1.0 MB

Nye, C. J., Queen, Katherine, and McCarthy, A. M., 1998, Volcanoes of Alaska: Alaska Division of Geological & Geophysical Surveys Information Circular IC 0038, unpaged, 1 sheet, scale 1:4,000,000, available at http://www.dggs.dnr.state.ak.us/pubs/pubs?reqtype=citation&ID=7043 .
website with links to sheets in MrSID format

"Quaternary Aleutian volcanism extends for over 2,500 km, from Buldir Island on the west to Mount Hayes on the east (fig. 1). This belt of volcanic activity lies immediately north of the Aleutian trench, a convergent boundary between the North American and Pacific lithospheric plates."

Motyka, R. J., Liss, S. A., Nye, C. J., and Moorman, M. A., 1993, Geothermal resources of the Aleutian Arc: Alaska Division of Geological & Geophysical Surveys Professional Report PR 0114, 17 p., 4 sheets, scale 1:1,000,000.
website with links to PDF and MrSID files

Mt. Iliamna volcano lies near the continental end of the 1500 mile long belt of Aleutian volcanos. It erupted near the border of the quartz diorite batholith composing the core of the Alaskan Peninsula. Hypersthene-augite andesite and basaltic andesite flows interbedded with coarse tuff breccias comprise this stratovolcano. Blocky lava fused into a slaggy matrix underlies most flows. These basal breccias seem to originate at the encrusting ends of moving flows which are continually overridden by the still advancing fluid lava.

Juhle, R. W., 1955, Iliamna volcano and its basement: U.S. Geological Survey Open-File Report OF 55-0077, 74 p., 2 plates, scale unknown.

Coats, R. R., 1950, Volcanic activity in the Aleutian Arc: U.S. Geological Survey Bulletin B 0974-B, p. 35-49, 1 sheet, scale unknown.
plate 1 PDF : 819 KB
full-text PDF : 783 KB

"The district considered in these notes includes Chisik Island and an area of about 225 square miles of mainland, approximately square in outline, extending from the south shore of Tuxedni Harbor and Tuxedni Bay southward toward Chinitna Bay, as far as Red Glacier, but it does not include the head of Tuxedni Bay, which was not visited by the field party in 1920. Interest in this area lies chiefly in the relation of its rocks to the oil-bearing sediments of Oil and Iniskin bays, to the south, and the possibility of oil production within it."

Moffit, F. H., 1922, Geology of the vicinity of Tuxedni Bay, Cook Inlet, Alaska: U.S. Geological Survey Bulletin B 0722-D, p. 141-147, 1 plate, scale unknown.
full-text PDF : 482 KB

"It is very certain that volcanic activity has existed at numerous points along the northwestern coast of America from the Golden Gate northward in comparatively recent times. Less certainty exists in this newly settled region as to historical outbursts."

Becker, G. F., 1898, Reconnaissance of the gold fields of southern Alaska with some notes on general geology: U.S. Geological Survey Annual Report 0018, p. 1-86, 6 sheets, scale unknown.
full-text PDF : 1.5 MB