AVO Sample Information

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SAMPLE INFO : 81Rj084C

Sample ID:	81Rj084C
Station ID:	81ARJ84
Latitude:	57.015837
Longitude:	-135.683322
Datum:	NAD83
Date Sampled:	1981-08-27
Sample Type 1:	Tephra Fall
Sample Type 2:	Bulk

Text Description:
Handpicked composite of subangular to subround yellow to white highly pumiceous lapilli from lithic-bearing ash-flow tuff | (Riehle) 81ARj084: 15m high sea cliff. Top pockets of lt grey ash & pumiceous lapilli to 1cm involved with massive modern tree roots (Samp A). | Entire cliff: Overlies ash-and-white, buff, yell pumice lapilli deposit. Lapilli mainly <2cm, vary 25-50%, in variable sandy matrix. Tough. Matrix mostly pale tan, but local discont lenses to 10, 20cm thick of pale grey sand. | Near top 2-3 horizons of organic-rich (ash?); resembles bedding, but could be secondary as along latter minor faults in slump block. Radioactive Samp B. | Believe a-f tuff. Samp C just below Samp B. | What crude bedding there is seems to parallel organic horizons, which are N45-50E 55NW. Plot.

References:

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

GEOCHEM DATA

StationID	Latitude	Longitude	Geologist	DateVisited	Age Info	Volcano	Eruption	Location Description	Text Description	Sample ID	Sample Type 1	Sample Type 2	Final Unit	Material	SiO2	TiO2	Al2O3	FeOT	MnO	MgO	CaO	Na2O	K2O	P2O5	Total-majors	REF majors	METH majors	Fe2O3/Fe203T orig	FeO/FeOT orig	Volatiles csv	METH volatiles	Cs	Rb	Ba	Sr	La	Ce	Pr	Nd	Sm	Eu	Gd	Tb	Dy	Ho	Er	Tm	Yb	Lu	Y	Zr	Nb	Hf	Ta	Pb	Th	U	Sc	V	Cr	Fe	Co	Ni	Cu	Zn	Ga	Mo	As	Na	K	Ref trace1	METH trace1	Rb	Ba	Sr	La	Ce	Nd	Sm	Eu	Gd	Dy	Er	Yb	Lu	Y	Zr	Nb	Pb	Th	U	Sc	Ti	V	Cr	Ni	Cu	Zn	Ga	Ref trace2	METH trace2	Light csv	Halogen csv	other major csv	other lile csv	other ree csv	other hfse csv	other hpe csv	other tm csv	other misc csv
81ARJ84	57.015837	-135.683322	Riehle, J. R.	1981-08-27		Edgecumbe		15m high sea cliff	Handpicked composite of subangular to subround yellow to white highly pumiceous lapilli from lithic-bearing ash-flow tuff \| (Riehle) 81ARj084: 15m high sea cliff. Top pockets of lt grey ash & pumiceous lapilli to 1cm involved with massive modern tree roots (Samp A). \| Entire cliff: Overlies ash-and-white, buff, yell pumice lapilli deposit. Lapilli mainly <2cm, vary 25-50%, in variable sandy matrix. Tough. Matrix mostly pale tan, but local discont lenses to 10, 20cm thick of pale grey sand. \| Near top 2-3 horizons of organic-rich (ash?); resembles bedding, but could be secondary as along latter minor faults in slump block. Radioactive Samp B. \| Believe a-f tuff. Samp C just below Samp B. \| What crude bedding there is seems to parallel organic horizons, which are N45-50E 55NW. Plot.	81Rj084C	Tephra Fall	Cumulate		Whole-rock	68	0.39	15	3.16	0.05	0.53	2.15	4.28	2.01	0.11	99.3	161	XRF	0.97	2.26	LOI=4.16	XRF

SAMPLE LOCATION

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