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Author Topic: how was this waxy rock formed?  (Read 22405 times)

Offline Bailey

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how was this waxy rock formed?
« on: 11/03/2010 03:27:43 »
it has a very waxy feel to it,is quite heavy and has a round sunken area with a button sized raised bit in the centre..and i cant work out how to insert the image haha


 

Offline Bailey

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how was this waxy rock formed?
« Reply #1 on: 11/03/2010 04:55:08 »
mm..ambergris from a whale?. this rock also appears to have a lighter coloured quartz like rock incorporated in it,and i found it in a dry creekbed.ive got pics but not a clue how to post them.neilep was posting pics for me before,so hopefully he can help me out again.
 

Offline LeeE

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how was this waxy rock formed?
« Reply #2 on: 11/03/2010 16:08:34 »
If it's a white colour it sounds a bit like Alabaster, but I wouldn't expect Alabaster to last very long in a creek[bed] because it's so soft.
 

Offline JimBob

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how was this waxy rock formed?
« Reply #3 on: 12/03/2010 00:14:35 »
How to post pictures

1.) Read Neil's instructions at http://www.thenakedscientists.com/forum/index.php?topic=2893.0

2.) In new topic under the box where you type your question, click on "Additional Options" A magical transformation will occur and suddenly there will appear a box where you can browse on your computer to upload a picture. There is a size limit on this that is less than the size limit on Photobucket.

There are also other services where you can post your own pictures.

A clear picture would stop us from guessing.


 

Offline Bailey

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how was this waxy rock formed?
« Reply #4 on: 12/03/2010 07:41:40 »
thanks jimbob..lee i dont think its alabaster it is too hard,and shiny,almost like its been varnished.the round bit is what i find so interesting..but ill get on to posting a picc for you folks to check out.
 

Offline Bailey

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how was this waxy rock formed?
« Reply #5 on: 12/03/2010 08:20:03 »
..not sure if im doing this correctly.
 

Offline Bailey

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how was this waxy rock formed?
« Reply #6 on: 12/03/2010 08:26:51 »
 

Offline LeeE

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how was this waxy rock formed?
« Reply #7 on: 12/03/2010 17:03:34 »
Oo-err - that's a funny looking thing.  In fact, it looks as though it might be man-made: it seems to have rather a lot of straight sides.

No idea what it is, other than interesting.
 

Offline RD

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how was this waxy rock formed?
« Reply #8 on: 12/03/2010 17:12:30 »
 

Offline JimBob

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how was this waxy rock formed?
« Reply #9 on: 12/03/2010 19:51:09 »
The following assumes that the darker brown part is raised and rounded. If it is sunken, it may still be a speleothem but I kind'a doubt it.

I think it is a tektite from a meteorite impact.

When meteors hit the earth, they dig a blast crater. Material from this impact crater is blasted into the atmosphere as partially or totally liquefied rock. As it is travels through the atmosphere, it cools but it cools in a form shaped by the aerodynamic forces of the atmosphere that the "glass" travels through the air. This results in things such as the rock you picture.

The fact that it has a mottled look is because it was not completely melted.


 

Offline Bass

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how was this waxy rock formed?
« Reply #10 on: 12/03/2010 20:33:41 »
Baily- how hard is the specimen?  Can you scratch it with a knife? 

My first impression was man-made also- but there appears to be  quartz crystal on the bottom of the first photo.
 

Offline Bailey

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how was this waxy rock formed?
« Reply #11 on: 12/03/2010 21:21:25 »
its very hard,i cant scratch it with a knife..and there appears to be quartz like parts (lighter in colour) throughout the rock.im thinking it is a comglomerate of some kind,but not man made.
 

Offline RD

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« Reply #12 on: 12/03/2010 21:28:48 »
Quote
Conulites are the "splash cups" that form on certain cave floors beneath energetic ceiling drip sites. Over time, repeated drips in one location may form a tiny calcified impact crater, or conulite, complete with its own ejecta blanket.
http://www.goodearthgraphics.com/virtcave/conulite/conulite.html
« Last Edit: 12/03/2010 21:31:54 by RD »
 

Offline Geezer

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how was this waxy rock formed?
« Reply #13 on: 12/03/2010 21:36:41 »
In fact, it looks as though it might be man-made:
 

To me, it looks more dog-made than man-made.
 

Offline JimBob

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« Reply #14 on: 13/03/2010 01:17:59 »
What about the ablation pits, Bass?
 

Offline Bailey

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how was this waxy rock formed?
« Reply #15 on: 13/03/2010 01:32:16 »
yeah geezer..it was only a matter of time before someone mentioned dog crap..
 

Offline Geezer

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how was this waxy rock formed?
« Reply #16 on: 13/03/2010 04:13:30 »
yeah geezer..it was only a matter of time before someone mentioned dog crap..

LOL - I does look a bit like one of those joke dog poops!
 

Offline Bailey

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how was this waxy rock formed?
« Reply #17 on: 13/03/2010 04:44:29 »
 

Offline Bass

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« Reply #18 on: 13/03/2010 06:17:05 »
jasperoid
 

Offline JimBob

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« Reply #19 on: 13/03/2010 23:38:53 »
thank you, thank you very much

 

Offline Bailey

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how was this waxy rock formed?
« Reply #20 on: 16/03/2010 11:09:57 »
so.. its from some melted form of silica..what about the round bit and its little button centre?
 

Offline JimBob

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« Reply #21 on: 16/03/2010 21:46:32 »
Bass is going to shoot me -

but since I am wearing my bullet proof armor .....

These below are glass tektites from Australia

http://tektiteinc.com/14grams.html

http://tektiteinc.com/56gramsb.html

Frethac has also posted pictures of them - http://www.thenakedscientists.com/forum/index.php?topic=28890.msg300921#msg300921 This plate is reproduced below.

http://www.fas.org/irp/imint/docs/rst/Sect18/tektite1.jpg

As well, a former professor (and a personal hero of mine) wrote an article of ejecta from impact craters


Terrestrial implication of layering, bubble shape and minerals along faults in tektite origin
Virgil E. Barnes
Bureau of Economic Geology, The University of Texas, Austin USA
Received 4 February 1964.
Geochem. Acta

Abstract
Both detrital mineral grains and minerals which crystallized in situ were first found in tektites along faults in Muong Nong-type indochinites from Kan Luang Dong, Thailand. The detrital mineral grains have the optical properties of quartz and are within the size range of quartz abundant in local soil and rock. Such a correspondence in grain size strongly implies that the tektites from Kan Luang Dong are locally derived. Layered tektites are probably the result of the accumulation in puddles of melt from flash fusion of bare patches of soil and rock. The faulting took place while the melt was very hot and the evidence for this is: (1) perfect welding of the fault-fractures with detrital grains equally embedded in the glass on either side of the welds, (2) growth of minerals along the faults, and (3) warping of the fault planes by movement of the melt following faulting.


It is my hypothesis that this is ejecta from an impact site that did not get totally melted, but only mostly melted. This piece is a bit of country rock (surface rock) ejected from the crater that is mostly glass but still retains characteristic of the original rock.

The button is formed (I am finally answering your question) in the same way as the buttons in the bottom part of the black and white picture above - by aerodynamic shaping of the partially melted rock entering the atmosphere. The pits all over it are places where material has ablated from the rock while it was reentering the atmosphere.

The fact that it is so hard, heavy and has aerodynamic shape TO ME indicate only an origin formed in the atmosphere.
« Last Edit: 16/03/2010 21:48:33 by JimBob »
 

Offline Bailey

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how was this waxy rock formed?
« Reply #22 on: 20/03/2010 03:50:27 »
jb..would you be interested in having a closer look at this..ill send it to you if you like so you can have a closer look.if this was formed in the atmosphere when it was still'semi molten' i cant see how it has its current shape.
 

Offline JimBob

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« Reply #23 on: 20/03/2010 15:43:10 »
Baily,

Please consider this move carefully. If you know of a friend or family member in one of university cities of Oz, they could take it to the geology department for an opinion. If you do wish to send it to me that would be wonderful. But please consider that move very carefully before you do it. There are many things that could go wrong.

 

Offline LeeE

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« Reply #24 on: 20/03/2010 15:52:31 »
Hmm... I'm beginning to wonder if this might be a tektite fragment from an iron meteorite.  Those straight edges still bother me a bit though.
 

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