Sentences with phrase «independently dated material»

Data from independently dated material (such as tree rings) indicate 18 periods of sunspot minima in the last 7,800 years.

Not exact matches

However, because we receive many suggestions that duplicate those previously made either by members of our own staff or by others, and because we may independently commence using material similar to yours that we receive or generate after the date of your submission, it has become necessary for us to adopt the general policy of refusing to consider any unsolicited material.