[Coyoteman]

"Good post."

Thanks. I thought this would be one that no-one read, lol.

Stable isotopes are good for establishing prehistoric diets.

On the west coast, we know of one early individual who had a high N15 to C13 ratio, suggesting an amazing 92.5% marine diet; and not just marine, but sea mammals!

In late prehistoric times the marine portion of the diet in this same area had dropped to about 10%.

Science has given us some wonderful tools for studying the past.

[Ernest_at_the_Beach]

Stable isotopes are good for establishing prehistoric diets.

I am uneducated in this knowlege....how is it possible ?

[blam]

"On the west coast, we know of one early individual who had a high N15 to C13 ratio, suggesting an amazing 92.5% marine diet; and not just marine, but sea mammals!"

"In late prehistoric times the marine portion of the diet in this same area had dropped to about 10%."

Any idea why?