Cinmar etc 

Using newspaper reports, especially those several years old, is usually not a good idea with articles like that. We need to see what the professionals have said about these. The decades old mastodon/tool find is a good example, see. Does anyone disagree that to use this we need to report what peer reviewed studies say?  This mentions the Delmarva claims but not Solutrean, do Bradford etc discuss it in a source we can use? 
Also WP:LEAD makes it clear that the lead is a summary of the article, it shouldn't contain anything significant not discussed in the article.