In June-July 1997, two ice cores to bedrock were recovered from the summit of 
the extinct Sajama volcano, Bolivia (18S, 69W, elevation 6540 m) and were 
subsequently transported back in a frozen state to the cold room facility at the Byrd Polar 
Research Center (BPRC).  Core 1 (SjC1, 132.4 m) was sectioned in the BPRC laboratory 
into 5063 samples decreasing in thickness from ~15 cm at the top to ~1-2 cm at the base.
Core 2 (SjC2, 132.8 m), drilled just 3m from the SjC1 site, was sampled more coarsely, only
803 samples collected from its length.  Borehole temperatures ranged from -11.3 to -9.5C
and indicate that the glacier remains frozen to the bed.
	Each ice sample from SjC1 and SjC2 were prepared in a Class 100 clean room 
environment, and analyzed for major anion concentrations (Cl-, NO3-, and SO42-) on a 
Dionex DX-500 ion chromatograph, d18O on a Finnigan Mat mass spectrometer (Craig, 
Geochim. Cosmochim. Acta, v. 12, 1957, p. 133-149), and for particulate concentration 
and size distribution using a Coulter TA-II particle counter (Thompson, OSU IPS Report 
46, 1973).
	For display purposes, variable averaging on the core depth scale was utilized to 
show the major large-scale events in the record without the confusion of the large annual 
variations superimposed upon the upper portion.  Hence, for SjC1, 5-m integrated 
averages were calculated for between the surface and 75 meters depth and then 3-m 
averages were generated between 75 and 105 meters, and finally 50-cm averages were 
generated between 105 m and the bottom.  The identical scheme was used for SjC2, and 
all of these data are included in sc12-5m.txt in this data archive, and the graph can be 
seen in Thompson et al., Science, v. 282, 1998, p. 1858-1864 (Fig. 3).  This figure is 
included in this archive as fig3.jpg.