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Exhibitions > underworld by John Jackson 210511



Risk





        
Risk

“RISK” is a painting depicting the ghost of a missing and now eroded mountain range whose remnants are covered by sands and clays. The sands and clays have trapped Australia’s first commercial oil field at Moonie where earth movements have thrust sheets of rock upwards along the Goondawindi- Moonie Thrust Fault.

 

In the bottom third of the painting rusty brown to red rocks are Palaeozoic metasediments that form part of the buried basement rocks beneath the Bowen and Surat Basins. These metasediments once formed a deep sea floor and were made up of thin-bedded clays and some jaspers. They have now been cooked under high temperatures and pressures and thrust over each other from right to left.

 

The blue to grey horizontal “lens” in the centre represents a deep sea fan, deposited by a tsunami during the deposition of the rusty brown to red rocks but now thrust over the rusty brown to red rocks.

 

The folded yellow to orange brown rocks in the top two thirds of the painting belongs to the same deep-sea sequence as the blue to grey and rusty brown to red rocks. However, they represent a mountain “ghost” as they no longer exist due to extensive erosion. Hence they have been depicted as unstable with black to purple holes and seem to be close to collapse.

 

All the rocks described so far were once part of the “Great Southern Gondwanan Mountain Range” that existed before Australia parted from Antarctica, India, Africa and South America.

 

On the right are two wiggly vertical lines that represent high technological data sets from Australia’s first commercial oil discovery, Moonie. Large sized yellow sand grains, medium sized yellow silt grains and small yellow clay particles can be seen between the wiggly lines. Artistic licence has been taken to restrict the sand, silt and clay only between the wiggly lines. In life they cover the whole painting. However, the dark green between the sand and silt is oil and is restricted to a small area around Moonie. The dark blue between the grains is moveable water and the pale blue is immovable water.

 

There was “RISK” when the tsunami speed across the deep sea floor. There was “RISK” when the rocks were thrust over each other to form a giant mountain range. There was “RISK” when the mountain range was extensively eroded resulting in widespread floods of sand, silt and clay. There was “RISK” involved in finding Australia’s first commercial oil. There remains “RISK” in the stories yet to be told.

 

The original painting now belongs to a private collection in Brisbane.




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