AVO Logo
Site Map | FAQ |
Alaska Volcano Observatory
 
You are here: Home > Samples > K-2500-M

SAMPLE INFO : K-2500-M
Sample ID:K-2500-M
Station ID:K-2500
Latitude:58.24
Longitude:-155.45
Datum:NAD83
Sample Type 1:Tephra Fall
Sample Type 2:Bulk
Text Description:
0.8-cm-thick tephra layer that is 32 cm from the base of the 1912 Novarupta fallout layer. Pl>opx>cpx+/-tr hb; opx:cpx = 5:1. Median diameter is 0.35 mm and maximum pumice length is 8 mm. Persistant layer that stands out prominently in the section; poorly sorted and contains a distinctive assemblage of abundant yellowed plagioclase and slightly greenish mica, some soapy green amphibole, oxidized magnetite, subequal proportions of opx and cpx, and a small fraction of frothy glass shards. Dark-brown, crystal-rich, and loosely consolidated tuffaceous-looking lithic clasts also present.

References:
Explosive eruptive record in the Katmai region, Alaska Peninsula: an overview

SAMPLE LOCATION

Contact AVO Privacy Accessibility Information Quality FOIA
URL: avo.alaska.edu/samples/sample_info.php
Page modified: August 1, 2017 15:29
Contact Information: AVO Web Team

twitter @alaska_avo
facebook alaska.avo
email Receive volcano updates by email: USGS VNS

This website is supported by the U.S. Geological Survey under Cooperative Agreement Grant G19AC00060 and G19AC00171.

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