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flint

Jurassic Jumper
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Reply with quote  #1 
hi, fellow rock hounds!

in my hometown of mount morgan queensland, we have dino prints displayed, in a man made fire brick cave. the prints are located where the kaolin stops and the overlying sandstone begins. this jurrasic sandstone pops up in queensland over a very large area and reminds me a bit of hastings sussex.
at one other location this sandstone has produced as well a dino footprint, but its location is held a secret, but we know it's located in carnavon gorge national park, an area proudly held by the indigenous traditional owners!!

back to mount morgan, not far from where the dino prints are located and some dino fossils have been found, is an other mountaineous area which is capped with Jurassic sandstone, and this was my search area (precise location I would reveal to experts).

the area was much steeper than expected, and very dangerous (loose and very steep scree and boulder fields and steep sandstone cliffs). at one stage I climbed up a sandstone face, but once on top, panicked for a while, because I overlooked the fact that climbing down the same way, was impossible, because the foot holds can't be spotted from the top. after talking myself down (I hate hights) I spotted an animal track not far from where I was resting, and I knew this track (probably invisible for newcomers) was my ticket out of this miserable situation.

I collected and brought home 3 specimens:
one jurrasic sandstone trace fossil id unknown
a gabbro/granite rock sample with pyrite (probably contains gold)
quartz/hematite?/ peacock ore? rock sample

I also took a few photos of rocks too big to carry home for me, which all show nice, to me unknown trace fossils.
last as well a pic of, something which can be found in a large area here (including the Stanwell quarry)
but so far nobody could id. some local collectors, call them dino bones, but I think they have a plant origin.
next post I will try to upload the pics.


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flint

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Reply with quote  #2 
SAM_3367.JPG  ups, I clicked the wrong pic, but leave it, it shows swirl holes in jurrasic sandstone.

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flint

Jurassic Jumper
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Reply with quote  #3 
SAM_3376.JPG  can the trace fossil experts here, id this please?

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flint

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Reply with quote  #4 
SAM_3374.JPG  I like this find, because it poofs how and where the trace fossils are formed. the white stuff is kaolin and the bottom part the jurrasic sandstone. the only dino fossil ever found (a plesio) was found in a kaolin type strata. I am hopefull this area could produce more than just those trace fossils. but I am getting a bit too old, for this dangerous and strenuous work...



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flint

Jurassic Jumper
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Reply with quote  #5 
SAM_3370.JPG  unindentified jurrassic fossil, this are common in my area, please id. plant origin?

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flint

Jurassic Jumper
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Reply with quote  #6 
SAM_3377.JPG  yep, and on the way back to the car (concluding a 5h hike!!) I discovered a small copper deposit!!
pic shows gabbro laced with malachite.


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Reply with quote  #7 
Hello, your tracefossils(2nd photo) are casts of tunnels made in the sediment by shrimplike lobsters and is known as "Thalassinoides".
The fossil ont the 4th photo is most probable a piece of fossilized wood.

greetings, Bert
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Elbert

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Reply with quote  #8 
Hello, your tracefossils are not at all boring, but borings! ; casts of tunnels dug by prawn/lobsterlike creatures...called Thalassinoides.
And on the other photo I see some fossilized wood.

greetings, Bert

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flint

Jurassic Jumper
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Reply with quote  #9 
thank you for the id bert!

I never saw those at the other locations, which though share the same geology. I wonder if those trace fossils, can shine some light, onto the question, what type of environment this place featured during the jurrassic periode. it say's they inhabited deep and shallow water...

in short does this mean, dino footprints are unlikely to be found in this area, but maybe they are associated with other fossils.
 http://cretaceous.ru/files/pub/temp/yanin_ea_2013_nory_thalassinoides_draft_en.pdf

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Elbert

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Reply with quote  #10 
Hello, sandstone is mostly formed in shallow seas, not to far from land.
The fossilized wood also tells land was near.
Do you know if it is lower, middle or upper Jurassic?

Plesiosaurs were sea-saurians, decendents of land animals, but not dinosaurs...

Happy (fossil)hunting!

greetings, Bert

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Reply with quote  #11 
Hi Jurassic jumper, good to see another Queenslander on the site. I am assuming the sandstone you refer to is Precipice sandstone?, I do not have reference material at hand. I will disagree about the crustacean burrows, pic 2 and 4 are fossil wood, limonite replacing siderite, representing a confusion of sticks and stems. Pic 3 is probably a depositional feature showing Load casts, likewise limonite. Dino fossils, always worth looking as the Precipice was deposited in an active fluvial basin. Hope this is helpful. Coprolite.
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