Strontium isotopes reveal distant sources of architectural timber in Chaco Canyon, New Mexico
Bibliographic Data
Between A.D. 900 and 1150, more than 200,000 conifer trees were used to build the prehistoric great houses of Chaco Canyon, New Mexico, in what is now a treeless landscape. More than one-fifth of these timbers were spruce ( Picea ) or fir ( Abies ) that were hand-carried from isolated mountaintops 75–100 km away. Because strontium from local dust, water, and underlying bedrock is incorporated by trees, specific logging sites can be identified by comparing 87 Sr/ 86 Sr ratios in construction beams from different ruins and building periods to ratios in living trees from the surrounding mountains. 87 Sr/ 86 Sr ratios show that the beams came from both the Chuska and San Mateo (Mount Taylor) mountains, but not from the San Pedro Mountains, which are equally close. Incorporation of logs from two sources in the same room, great house, and year suggest stockpiling and intercommunity collaboration at Chaco Canyon. The use of trees from both the Chuska and San Mateo mountains, but not from the San Pedro Mountains, as early as A.D. 974 suggests that selection of timber sources was driven more by regional socioeconomic ties than by a simple model of resource depletion with distance and time.
Archaeology · Bedrock · Canyon · Geography · Geomorphology · Physical geography · Prehistory · Archaeology and ancient environmental studies · Forestry · Geology · Geology and Paleoclimatology Research · Paleontology · Tree-ring climate responses
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Going against the Grain
| Unique citing works | 75 |
|---|---|
| Citations per year | 3,13 |
| Citation span | 2002 - 2026 (25) |
| Citation velocity | current |
| Highly cited | No |
| Citation types | Neutral: 67 |