Tracking the Ancient Elephant
When
Master's student Will Higgs first saw Lord of the Rings there was one
particular on-screen creation which caught his eye.
The giant multi-tusked Mumakil
in the film's battle scenes would have looked very much like the ancient
elephants that Will has been studying.
Will Higgs
examines the dried-up remains of a camel on a road in Abu Dhabi.
"When I saw the film, I said
'those are our Gomphotheres' - the elephants in the film had multiple
pairs of tusks - just like the fossil ones had. They must have looked
amazing," said Will.
Will is hoping to return later
this year to the western region of Abu Dhabi in the Middle East, where
he has been studying the fossilised footprints of a species of Gomphothere
called Stegotetrabelodon syrticus.
"Mammoths are actually relatively
modern elephants - what we are looking at are the ancestors of the mammoth.
"A young United Arab Emirates
national familiar with this region drew our attention to the footprints
- he noted that his father had once told him that they were dinosaur tracks.
"We
think there were about 14 of these animals walking side-by-side but it
is difficult to sort out the individual tracks until we get a chance to
make a better survey".
Will Higgs' wife Alison
(kneeling) and two staff at Blackpool Zoo measuring an elephant
The footprints are thought
to be six to eight million years old and belong to the late Miocene period
when human ancestors first appeared.
"People often think that footprints
are just impressions of feet, but actually they are not. They are an expression
of the forces that act through the foot."
By taking measurements of the
spaces in between the prints, you can estimate pace and stride. Will believes
that Gomphotheres would have been much bigger than the modern-day Asian
elephants, which he studied at Blackpool Zoo as part of his research.
From the combined evidence
of footprints and fossil bones found nearby Will explained that there
is much that you could reconstruct about how this giant land mammal might
have looked and moved.
"When you study fossil bones,
you must remember that all sorts of things could have happened to the
bones before they were fossilised. They could have been gnawed, weathered,
carried by animals or swept away down a river. They are unlikely to be
in the place where the animals actually lived.
"But with the footprints,
you have evidence of the animals in the exact spot where they lived, and
doing what they would normally be doing - these footprints are a great
source of complementary evidence and when you put them together with the
fossils, the information from each adds up to more than the sum of the
parts".
Will explained that there are
a number of methods that can be combined to date the geological formations
containing the footprints. One is analysing the properties of the rocks
in which the footprints are found, while another is identification of
fossil species also found in other rocks of a known date.
"It becomes more and more
exciting as you study past environments - you start to realise just how
much reconstruction is possible."
Head of the University's Department
of Archaeological Sciences and Senior Lecturer
in Archaeology and Anthropology Dr Randolph Donahue said: "The Mleisa
site in the Western Region of Abu Dhabi adds to our understanding of the
expanse of the savannah grasslands that extended from East Africa, across
the Arabian Peninsula and west Asia to India during the Pliocene and much
of the Pleistocene.
"It has major implications
for the evolution and dispersal of animals adapted to this habitat including
our early hominoid ancestors."
16 April
2004
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