continued our trip up the Quebrada de los Conchas toward Salta.
The photos below are what we saw.
locals call this structure "El Obelisco". This is a
siltstone structure produced by erosion.
tilted strata produced interesting shapes when eroded.
curtains that have evolved due to soft strata and intense rain.
across Rio del Conchas to cliffs on the other side of the river.
cliffs were visible across the river.
shapes evolve in soft mudstone.
the mudstone was exposed resulted in deep slots in the strata.
red rock reminded us of southern Utah and western Colorado.
areas, the sandstone was capped by harder rock resulting in more
complex shapes. Note the warping of the strata in the
center of the photo above.
canyons opened up to yield beautiful panoramas.
hoodoos carved from soft stone.
uplift that produced the Quebrada also exposed large slabs of
rock producing deep canyons between the layers of rock.
right next to the roadway. These also produce hazards due
to falling rocks.
warping in the bedding. The forces required to do this are
field of hoodoos.
Quebrada area was crossed by faults resulting in deep canyons
and heavily distorted zones in the strata. At least three
different blocks of material are visible in the photo above.
higher areas were softer material than the lower producing
curtains on the high cliffs.
river valley was quite broad in this area of the Quebrada.
sections of cliffs were visible in some of the side canyons.
nearly missed this iconic feature called "Gargantua del Diablo"
(Throat of the Devil). This is a narrow side canyon
created by the erosive power of fast-moving water.
after seeing it many times, I am still surprised by epiphytes
living in the desert. These epiphytes were spotted high up
on a dead tree trunk in the arid side canyon.
violent nature of running water has reshaped the road system
through the Quebrada multiple times. In many places we saw
evidence of the original road, a newer road and, of course, the
current road. The stone bridge in the photo above was the
newer road, but this section of road was isolated due to land
slides resulting in a change in the path of the road.
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Photos and Text Copyright Bill Caid 2018, all rights
For your enjoyment only, not for commercial use.