Dinosaur`s
Tracks
- occur on the
farm Otjihaenamaparero
The tracks occur
in sandstones of the 190 million
years old Etjo Formation.
The sands formed these sandstones
accumulated under increasingly
arid conditions as wind blown
dunes similar to the Namib Desert
today.
Numerous reptiles
lived in the interdune areas,
but as the climate became drier,
these animals were forced to concentrate
near waterholes, small lakes and
rivers fed by occasional rainfalls
and thunderstorms. Inevitably,
their feet left imprints in the
wet sediment around the water.
Later these imprints were covered
by other layers of wind blown
sand, and were preserved as trace
fossils when the sand solidified
into rock due to the pressure
that built up as they were buried
deeper and deeper.
At Otjihaenamaparero,
two crossing tracks consist of
more than 30 imprints with a size
of approximately 45 by 35 cm.
The longer tracks can be followed
for about 28 meters. There is
a distance of some 70 to 90 cm
between individual imprints as
well as some tracks comprising
smaller imprints of about 7 cm
length and spaced about 28 to
33 cm apart (Gührich, 1926).
All tracks show the form of a
three toed, clawed foot very well,
and from their arrangement it
can be deducted that they were
made by the hind feet of a bipedal
animal.
There are a number
of localities in the Etjo Sandstone
that contain dinosaur footprints,
however, Otjihaenamaparero is
the most impressive one. The site
has been declared a National Monument
, and the footprints are protected
by law.
Age of the Dino-Tracks approx.
219 million years.
Big Tracks: > CERATOSAURIA
<
Small Tracks: > SYNTARSUS <
Gührich,
G. (1926): Über Saurier-Fährten
aus dem Etjo – Sandstein,
vom Südafrika. Palänt.
z., 8(1), 112-120
Lockley, M. (1991):
Tracking Dinosaurs. 238 pp, Cambridge
University Press, Cambridge. |