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The
Giant Pebble
In
the writings of early European explorers, Uluru was often
described as a giant pebble. While this is the impression
it gives, it does not just sit on the desert surface. The
rock is the exposed tip of an almost vertical slab of sedimentary
sandstone. Just how far down it goes is still unknown, perhaps
six kilometers. The
rock was recorded in 1872 when Ernest Giles saw it from
the northern side of Lake Amadeus. He reached it the following
year, only to find that William Gosse had just departed
after examining it and naming it in honor of Sir Henry Ayers,
premier of south Australia. Gosse wrote in his journal that
it was “certainly the most wonderful natural feature I have
ever seen.”
What
Gosse saw was a rock measuring over two miles from side
to side and a mile from front to back. The parallel ribbing
across the surface of Uluru, which is so clearly seen from
the air, is a product of the original layering of sediments.
These layers were once horizontal, but tilting of the entire
rock stratum has brought them into an almost vertical alignment.
This is the more scientific interpretation; the Tjukurpa
stories are far more poetic.
-
P.H.
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