Unidentify rock found in northern part of Canada

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Offline jcdostie

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Unidentify rock found in northern part of Canada
« on: 09/02/2016 00:36:00 »
Hello,
I'm new here and french speaking, most of the time ;-)
Look at those pictures, we have found this rock at those coordinates, about 20' from the shoreline of the Rupert River
51 21.919'N
77 46.903'W







And we made a video of the discovery

Any help would be appreciate

Thanks
JC

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Offline Atomic-S

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Re: Unidentify rock found in northern part of Canada
« Reply #1 on: 09/02/2016 06:49:15 »
I have no idea. The depth of carving suggests this is not the work of a weekend graffitist. It should be looked at by someone learned in indigenous artifacts.
 

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Offline RD

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Re: Unidentify rock found in northern part of Canada
« Reply #2 on: 17/02/2016 07:53:46 »
It's a fossil rather than an artefact.

Cross-section of tubular sponge ?


http://www.kgs.ku.edu/Extension/fossils/sponge.html



Try ... http://www.thefossilforum.com/index.php?/forum/14-fossil-id/
« Last Edit: 17/02/2016 08:07:26 by RD »

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Offline Colin2B

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Re: Unidentify rock found in northern part of Canada
« Reply #3 on: 17/02/2016 09:02:56 »
Neat, it really did look carved.
Thanks for the link
and the misguided shall lead the gullible,
the feebleminded have inherited the earth.

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Offline Ophiolite

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Re: Unidentify rock found in northern part of Canada
« Reply #4 on: 18/02/2016 11:19:42 »
While I don't rule out the possibility that RD's explanation is correct, I have serious doubts. The rock appears to be a basic igneous rock, possibly a basalt - not the normal environment for tubular sponges! Now it could be a medium grained sandstone, but without a much closer view I should not like to give a definitive answer.
Observe; collate; conjecture; analyse; hypothesise; test; validate; theorise. Repeat until complete.

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Offline jcdostie

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Re: Unidentify rock found in northern part of Canada
« Reply #5 on: 18/02/2016 12:46:56 »
Thanks all for the replies.
I spoke with a geologist and he told me it might be a Stromatolite

I think the tubular sponge is much more similar from what I can see

The rock appears to be a basic igneous rock, possibly a basalt - not the normal environment for tubular sponges! Now it could be a medium grained sandstone, but without a much closer view I should not like to give a definitive answer.
I don't think it's a sandstone. It's very hard. What other pictures do you need ?

JC



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Offline RD

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Re: Unidentify rock found in northern part of Canada
« Reply #6 on: 18/02/2016 12:47:34 »
I have serious doubts. The rock appears to be a basic igneous rock, possibly a basalt ...

How about a thin [grey] coating of basalt on sandstone ? , ( coating is weathering-off ) ...

[attachment=20979]
[ Contrast & saturation increased ].
« Last Edit: 18/02/2016 12:54:25 by RD »

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Offline jcdostie

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Re: Unidentify rock found in northern part of Canada
« Reply #7 on: 18/02/2016 12:56:11 »
HUM !!! Very interesting.
I will have a closer look this week-end.
The rock is at my friend's house now and it's cover with snow.

JC

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Offline RD

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Offline Bass

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Re: Unidentify rock found in northern part of Canada
« Reply #9 on: 02/03/2016 21:27:46 »
Try putting some hydrochloric acid on the rock- it may well be limestone (you'll get fizzy bubbles).
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