Note that patterns from the exposed rocks in
the Shield can be followed below the sedimentary cover.
Let’s remember how units on the western side of the Trans-Hudson
orogen dip into the Alberta Basement transect area. The geological
cross section we just looked at runs about east to west near the
southern edge of THOT. Follow this westward across the AB transect
and we cover about 1,000 km as we cross the STZ. Within this distance
we have two huge, once mighty and now eroded, mountain chains which
comprise the THO and the Alberta orogen, which still is unnamed;
its discovery is that new. By the way, what would YOU call the mountain
chain in the Alberta Basement? Any suggestions? Think about it as
we look the Alberta Basement over .