[meteorite-list] RE: Moqui Marbles

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From: Rob and Colleen <iguana_at_meteoritecentral.com>
Date: Thu Apr 22 09:44:35 2004
Message-ID: <3A9E9C53.C5910620_at_pcez.com>

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Moqui Marbles aka Ohio Meteorites. Get yours on eBay now.

http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=564933699
Rob Wesel

Matt Morgan wrote:

> Hi Robert:
> I've collected Mogui Marbles myself in Utah a few years back. Your
> explanantion of them as concretions is the one that I've always heard, and
> never had reason to doubt it. As far as an impact explanation goes, I am
> highly suspect. I did have a thin section made of a couple of them at the
> time. No evidence of impact was found, and I would have found it if the
> silica or any mineral for that matter appeared to have been "molten". I
> could see that one would think this since the grains are coated, usually by
> calcite which acts as the bonding agent. Occasionally, at the center of a
> concretion, there may be a small piece of organic detritus. This was the
> substrate that the other grains adhered to. Anyway, the area didn't look
> like an impact site, nor was there any evidence in the marbles themself.
> Thanks for bringing this up!
>
> Matt
>
> ----------
> Matt Morgan
> Mile High Meteorites
> http://www.mhmeteorites.com
> P.O. Box 151293
> Lakewood, CO 80215 USA
>
> -----Original Message-----
> From: Robert Verish [mailto:bolidechaser_at_yahoo.com]
> Sent: Wednesday, February 28, 2001 8:07 PM
> To: mmorgan_at_mhmeteorites.com
> Cc: meteorite-list_at_meteoritecentral.com
> Subject: Moqui Marbles
>
> REF: http://www.rocksnstuff.com/specimens/moqui.htm
>
> Hello Matt,
>
> Last weekend I had a display case at the San Fernando
> Gem Fair in which I would show a meteorite, and then
> right beside it, a look-a-like meteor-wrong. One of
> these meteor-wrongs that I had displayed was a "Moqui
> Marble", which I had labeled as a "limonite/hematite
> concretion in sandstone". My explanation for how
> these stones were formed started a lively debate among
> the rockhounds in attendance at the show.
>
> What I would like to ask you is what do you know about
> the origins of these remarkably similar-shaped stones?
> I know Dave Freeman has a comment or two that he
> could make about these stones, but since you have been
> doing impact-related field work close to this area, I
> thought I would give you first crack at this topic.
>
> It just so happens that one of our own brethren
> [geologist] has muddied the waters, regarding the
> origins of these stones. ("My sediments exactly."
> said another geologist friend of mine.;-)
>
> Here is what he had to say regarding these stones, at
> this URL:
>
> http://www.rocksnstuff.com/specimens/moqui.htm
>
> "This material was formed in an impact site 12 miles
> east of Escalante UT in an area known as 'Big Spencer
> Flat'. The 'marbles' are composed of millions of
> molten spheres condensing on sand grains that bumped
> into and joined with other grains to form small
> spheres that joined with others to become even larger,
> with the hematite/silica coating always moving to the
> outside, but leaving a thin coat on most sand grains
> inside.
>
> "Some larger spheres cooled below the melting point
> during this process, so all steps of it can be seen.
> Some 'marbles' landed in sand, others in limestone,
> and
> some have joined in almost every way imaginable. Most
> of the crater has eroded away, but the remnants of
> dikes created in the impact are still visible.
>
> "The principle collecting area is in the new Escalante
> Monument, but material was deposited on top of eroded
> Navajo Sandstone as far as Lake Powell. I have yet to
> determine if reports from Scofield Reservoir could be
> the same formation, or a different impact. I am sure
> the same process has produced 'Indian Paint Pots' in
> sandstones from many time frames all around the world,
> and are much like 'tektites.'"
>
> The above quote is from Dave Cosby, a geologist who
> has been doing some research on the Utah area where
> Moqui Marbles are found. Dave believes that the
> uniformly shaped stones were the result of a meteorite
> impact in that area.
>
> While we're on this subject, here is a "heads-up" for
> the members of our eBay "Wrong Squad" - at these URLs:
>
> <http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=564933699>
>
> and
>
> <http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=564933715>
>
> __________________________________________________
> Do You Yahoo!?
> Get email at your own domain with Yahoo! Mail.
> http://personal.mail.yahoo.com/
>
> _______________________________________________
> Meteorite-list mailing list
> Meteorite-list_at_meteoritecentral.com
> http://www.pairlist.net/mailman/listinfo/meteorite-list

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<HTML>
Moqui Marbles aka Ohio Meteorites. Get yours on eBay now.

<A HREF="http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem">http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem</A>&item=564933699
 Rob Wesel
  

Matt Morgan wrote: 
<BLOCKQUOTE TYPE=CITE>Hi Robert:
 I've collected Mogui Marbles myself in Utah a few years back. 
Your
 explanantion of them as concretions is the one that I've always heard,
and
 never had reason to doubt it. As far as an impact explanation goes,
I am
 highly suspect.  I did have a thin section made of a couple of
them at the
 time. No evidence of impact was found, and I would have found it if
the
 silica or any mineral for that matter appeared to have been "molten". 
I
 could see that one would think this since the grains are coated, usually
by
 calcite which acts as the bonding agent. Occasionally, at the center
of a
 concretion, there may be a small piece of organic detritus.  This
was the
 substrate that the other grains adhered to.  Anyway, the area
didn't look
 like an impact site, nor was there any evidence in the marbles themself.
 Thanks for bringing this up!

Matt

----------
 Matt Morgan
 Mile High Meteorites
 <A HREF="http://www.mhmeteorites.com">http://www.mhmeteorites.com</A>
 P.O. Box 151293
 Lakewood, CO 80215 USA

-----Original Message-----
 From: Robert Verish [<A HREF="mailto:bolidechaser_at_yahoo.com">mailto:bolidechaser@yahoo.com</A>]
 Sent: Wednesday, February 28, 2001 8:07 PM
 To: mmorgan_at_mhmeteorites.com
 Cc: meteorite-list_at_meteoritecentral.com
 Subject: Moqui Marbles

REF:  <A HREF="http://www.rocksnstuff.com/specimens/moqui.htm">http://www.rocksnstuff.com/specimens/moqui.htm</A>

Hello Matt,

Last weekend I had a display case at the San Fernando
 Gem Fair in which I would show a meteorite, and then
 right beside it, a look-a-like meteor-wrong. One of
 these meteor-wrongs that I had displayed was a "Moqui
 Marble", which I had labeled as a "limonite/hematite
 concretion in sandstone".  My explanation for how
 these stones were formed started a lively debate among
 the rockhounds in attendance at the show.

What I would like to ask you is what do you know about
 the origins of these remarkably similar-shaped stones?
  I know Dave Freeman has a comment or two that he
 could make about these stones, but since you have been
 doing impact-related field work close to this area, I
 thought I would give you first crack at this topic.

It just so happens that one of our own brethren
 [geologist] has muddied the waters, regarding the
 origins of these stones.  ("My sediments exactly."
 said another geologist friend of mine.;-)

Here is what he had to say regarding these stones, at
 this URL:

<A HREF="http://www.rocksnstuff.com/specimens/moqui.htm">http://www.rocksnstuff.com/specimens/moqui.htm</A>

"This material was formed in an impact site 12 miles
 east of Escalante UT in an area known as 'Big Spencer
 Flat'. The 'marbles' are composed of millions of
 molten spheres condensing on sand grains that bumped
 into and joined with other grains to form small
 spheres that joined with others to become even larger,
 with the hematite/silica coating always moving to the
 outside, but leaving a thin coat on most sand grains
 inside.

"Some larger spheres cooled below the melting point
 during this process, so all steps of it can be seen.
 Some 'marbles' landed in sand, others in limestone,
 and
 some have joined in almost every way imaginable. Most
 of the crater has eroded away, but the remnants of
 dikes created in the impact are still visible.

"The principle collecting area is in the new Escalante
 Monument, but material was deposited on top of eroded
 Navajo Sandstone as far as Lake Powell. I have yet to
 determine if reports from Scofield Reservoir could be
 the same formation, or a different impact. I am sure
 the same process has produced 'Indian Paint Pots' in
 sandstones from many time frames all around the world,
 and are much like 'tektites.'"

The above quote is from Dave Cosby, a geologist who
 has been doing some research on the Utah area where
 Moqui Marbles are found.  Dave believes that the
 uniformly shaped stones were the result of a meteorite
 impact in that area.

While we're on this subject, here is a "heads-up" for
 the members of our eBay "Wrong Squad" - at these URLs:

<<A HREF="http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=564933699">http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=564933699</A>>

and

<<A HREF="http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=564933715">http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=564933715</A>>

__________________________________________________
 Do You Yahoo!?
 Get email at your own domain with Yahoo! Mail.
 <A HREF="http://personal.mail.yahoo.com/">http://personal.mail.yahoo.com/</A>

_______________________________________________
 Meteorite-list mailing list
 Meteorite-list_at_meteoritecentral.com
 <A HREF="http://www.pairlist.net/mailman/listinfo/meteorite-list">http://www.pairlist.net/mailman/listinfo/meteorite-list</A></BLOCKQUOTE>
 </HTML>

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Received on Thu 01 Mar 2001 02:00:35 PM PST

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