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Buzzard Creek description and information

BUZZARD CREEK LINKS

SAMPLES
LOCATION
FACTS
Type:Tuff rings
Most Recent Activity:
Seismically Monitored: No
Elevation: 2723 ft (830 m)
Latitude: 64.061082° N
Longitude:148.431932° W
Quadrangle:Fairbanks
CAVW Number:315001
Pronunciation: Sound file
Nearby towns:Ferry 16 mi (25 km) SW
Denali Borough 22 mi (35 km) SW
Healy 22 mi (35 km) SW
McKinley Park 27 mi (43 km) SW
Anchorage 202 mi (325 km) SW
DESCRIPTION
From Wood and Kienle (1990): "The Buzzard Creek craters are two tuff rings at the headwaters of Buzzard Creek, a tributary of the Totatlanika River, near Healy at the northern foot of the central Alaska Range. The two craters are shallow and contain small lakes. Rim ejecta contain 80% country rock fragments and 20% juvenile basaltic material, suggesting a phreatomagmatic origin. The basalt rests on the youngest glacial terraces on Buzzard Creek, which are correlated with the Riley Creek glaciation that ended ~10,000 yr BP. Three C14 dates from charcoal samples above and below the basaltic ejecta give an age of eruption of ~3,000 yr BP, in agreement with stratigraphic evidence of a Holocene age. A 300-m-wide ejecta blanket associated with the larger crater can be traced 1.6 km from the vent. The total volume of the ejecta probably does not exceed 1 million cubic m, of which only 20% is volcanic, consisting of vesicular basalt lapilli and small bombs.

"The Buzzard Creek craters, though insignificant in the volume of ejecta, are of regional tectonic interest because they occur on trend with the Aleutian arc structure and are situated directly over the northernmost corner of the subducting Pacific plate. The easternmost known volcano of the Aleutian arc is Hayes volcano, 320 km southwest of the Buzzard Creek craters. Whether the craters are tectonically linked to the Aleutian subduction zone is not clear."

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Page modified: June 12, 2014 07:20
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