[AndrewC]

So what was your point again?

Archie is older than sino by at least 15 million years. Archie has impressions of advanced feathers of a type associated with flight. Sino has "fuzzy" impressions. This chart shows Sino (among other feathered creatures) as older than Archie.

[gomaaa]

Absolutely right. The chart can't be right. I think the author was trying to point out a variety of ways in which birdlike features arose in dinosaurs and didn't care too much which came first. As to the variation in feather impression quality, Archie apparently left better fossils. Whatever.

Your point?

[Junior]

I read the chart as archy being younger than sino (it comes after the latter on the chart). 'Course, it would be nice if there were dates there, but the number sequence seems to bear me out.