Imuruk Lake
Volcanic field · United States · 610m
- Type
- Volcanic field
- Country
- United States
- Region
- North America Volcanic Regions / Northern Alaska-Bering Sea Volcanic Province
- Elevation
- 610m
- Coordinates
- 65.517, -163.450
- Last eruption
- 300
- Tectonic setting
- Intraplate / Continental crust (> 25 km)
- Landform
- Cluster
- Major rock type
- Basalt / Picro-Basalt
Geological summary
The Oligocene-to-Holocene Imuruk monogenetic volcanic field in the central Seward Peninsula north of the Bendeleben Mountains contains around 75 small basaltic vents surrounded by voluminous lava flows. The largest and most recent vent is the Lost Jim cone, a 30-m-high cinder cone near Imuruk Lake that produced the only Holocene lava flow in the field. The massive Lost Jim lava flow, erupted about 1,655 years ago, extends 35 km W and 9 km N of the vent, and covers about 230 km2. The next youngest flow, the late-Pleistocene Camille lava flow, traveled 39 km from its vent.
From Wikipedia
Imuruk Lake is the largest body of fresh water in Seward Peninsula in the U.S. state of Alaska. It measures 31 square miles (80 km2) and has a drainage basin of 102 square miles (260 km2), It lies on top of a lava plateau at an elevation of 960 feet (290 m). The drainage basin is relatively flat, as the maximum elevation is only about 1,600 feet (490 m). A low gap in the divide between the lake and the head of the right fork of Goodhope River rises only a few feet above the lake. The Fairhaven Ditch takes practically all its water from the lake. Serpentine Hot Springs flow to the Serpentine River, 47 miles (76 km) northwest of Imuruk Lake.
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Eruption history
Detailed timeline
- 300VEI ?Geological estimate300 – OngoingLost Jim Cone
External links
⚠ For reference only. Not for emergency response.