How does strontium help us know where the logs in Chaco Canyon came from? GIVING BRAINLIEST

Because strontium from local dust, water, and underlying bedrock is incorporated by trees, specific logging sites can be identified by comparing 87Sr/86Sr ratios in construction beams from different ruins and building periods to ratios in living trees from the surrounding mountains.

Explanation:

that is because lower interest rates allowed people to work harder to make money. it multiplied like that and now the uno(not the game) is very strong.

i like trains

the correct answer is ''the programs costs have risen dramatically in the recent past'' hope this !