A favorite loop trail brings visitors into the sanctuary past the power lines to heron rookery and then toward
the exposed rock outcrops where porcupine live.
Tao Su, lead author on the paper and associate professor at Xishuangbanna Tropical Garden, discovered the fossils near his home in Kunming in southwest China when some road construction
exposed a rock outcrop from the late Pliocene.
Not exact matches
They examined 130
outcrops on the flanks of the volcano,
exposing sequences of pumice — ash hardened into
rock — and other pyroclastic material.
Over time, as wind blows sand against the small cliffs, or scarps, that bound the Yellowknife
outcrop, the scarps erode back, revealing new
rock that previously was not
exposed to cosmic rays.
But internal features of the slide,
exposed in
outcrops, yielded evidence such as jigsaw puzzle
rock fractures and shear zones, along with the pseudotachylytes.
Many of the flow systems seem to start in the Antarctic mountains, near
outcrops of
exposed rock, or in places where fierce winds have scoured snow off the ice beneath.