Archaeologists vs. The National Geographic Channel

I watched part–(life intervened) of an episode of the American series to see how the elements were translated to the demands of US television (albeit public tv). I had seen a dozen episodes or so of the Channel 4 production-- from many different seasons.

My first thought?

Oh yeah… Archeologists sift the soil through screens.

And yet somehow, I don’t recall seeing this sort of procedure on Time Team UK. What gives?