"Growing up in the Colorado Rockies, we called the small loose sharp stones scree. Larger stones that still can shift pretty easily we called talus. Areas of bigger stuff that mostly stayed put were called boulder fields."
Agree. But whatever you call it, maybe "shale" scree or shale talus, next to wet mossy tread with no traction whatsoever, is what I dread most. Because the flat pieces of shale slide over each other, and it makes no difference how well your footwear holds to the rock. This is found in the Gore Range in CO, which explains why many of the routes near the Gore peaks are left to climbers.
Also found some steep shale in the Collegiates, further south in CO. Went up Frenchman Creek, just a little NE of Mount Columbia. All nice grassy terrain until over the pass, where a 'trail' on the map descended North toward Pine Creek. Nothing but steep shale. Before this hike, had used only walking sticks, but had decided to bring along and try out a Leki hiking pole bought cheap at the local Bean's outlet. Thank goodness. Was able to poke around with the pole for a solid spot, move one foot onto it, then poke around for another solid spot, and so on, always keeping two points of contact with the shale. Still, could not negotiate down the slope, and had to contour way out of my way to get down. So submit that poles have their place in the heights, albeit not amongst the boulders as stated.
"A lot of times that is just normal hiking in NH ;"
That's because the AMC throws rocks into the middle of the treadway.