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Sample: 81ARJ70E

Sample ID: 81ARJ70E [1]
Station ID: 81ARJ70
AT Num:
Volcano: Edgecumbe
Possible source: Edgecumbe
Eruption:
Collector: Riehle, J. R.
Date sampled: 1981-08-25
Sample type 1: Tephra Fall
Color:
Final unit:
Text Description: Handpicked composite of medium gray-brown scoriaceous lapilli from one of several airfall deposits of lapilli and ash | (Riehle) WALL OF BORROW PIT. 8cm: org soil. 1-2cm: fine, light grey ash, grades down. | 4 cm: org soil. 10cm ash & fine lapilli; pale honey, weather light gy; SAMP A. | 50cm: "salt and pepper" pale yell w/ dark grey solid lava; internally strat; coarse sand & fine pebs; SAMP B. | 50cm crs sand to 5cm, angluar yell pumiceous lapilli. Alters or coats to dark red-bn. Breaks down to water-soaked, 'spongy' feel SAMP C. | 6cm yell-orange, f pebs grading up to grey-yell, crs sand. Pumice. SAMP D. | 25cm loose red pumiceous lapilli, rare vesic black lapilli, up 2cm. Grades up to coherent dull grey SAMP E. | 6cm: 'diamiction.' Dk gy matrix, underlying lapilli. Soil? SAMP F. | 15m exposed: alternating 4-10cm layers of red, black highly vesic lapilli. crs sand to 2-3cm SAMP G = composite of uppermost 3-4 beds. | All observed layers are horizontal
Sample Location:

References Cited

[1] Pyroclastic deposits of the Mount Edgecumbe volcanic field, Southeast Alaska: eruptions of a stratified magma chamber, 1992

Riehle, J. R., Champion, D. E., Brew, D. A., and Lanphere, M. A., 1992, Pyroclastic deposits of the Mount Edgecumbe volcanic field, Southeast Alaska: eruptions of a stratified magma chamber: Journal of Volcanology and Geothermal Research, v. 53, n. 1, p. 117-144.