THE AGE OF THESE ARTIFACTS
The final report from the University of Washington Thermoluminescence Dating Lab is:
UW3512 - Sandstone with glyphs
UW3513 - Pyroclastic material with bones and beads
UW3514 - Ceramic partially covered with pyroclastic material
UW3515 - Glass pieces
UW3571 - Hard ceramic or rock
CALENDAR DATE (years AD/BC)
UW3512 - BC 5110 ± 2300 =7,100 years old
UW3513 - AD 1420 ± 60 = 600 years old
UW3514 - AD 1580 ± 300 = 440 years old /Last Eruption
UW3515 - BC 3490 ± 820 = 5,500 years old
UW3571 - AD 230 ± 130 = 1,900 years old/Previous eruption
