[meteorite-list] Chelyabinsk - slickensides or shock planes?
From: Anne Black <impactika_at_meteoritecentral.com>
Date: Tue, 21 May 2013 17:02:34 -0400 (EDT)
Does this help Jim?
To me, slickensides look almost like streaks, and yes, shiny.
Like my cat scratched it! ;-)
Anne M. Black
IMPACTIKA at aol.com
From: Jim Wooddell <jim.wooddell at suddenlink.net>
To: meteorite-list <meteorite-list at meteoritecentral.com>
Sent: Tue, May 21, 2013 2:08 pm
Subject: Re: [meteorite-list] Chelyabinsk - slickensides or shock
Welp, I just need to see one up close. But in the mean time here is a
paper on the subject that may be of interest...
On 5/21/2013 10:26 AM, Michael Farmer wrote:
> Jim, there are shock veins and slickensides. They are not the same
are result of shock but not melting like the full melt veins are.
> I have hundreds of pieces with slickensides. I am traveling so I
> Perhaps later.
> Michael Farmer
> Sent from my iPhone
> On May 21, 2013, at 12:19 PM, Jim Wooddell
<jim.wooddell at suddenlink.net>
>> Hi Jim Baxter,
>> And, that is what I am not seeing. I'am going to be a very hard
sell on the
term slickensides until I see something that scientifically supports it
it is there. Do the threads actually appear and are they threads??
>> In my mind, the coming apart part would not create a slickenside
where as the coming together with great pressure and time would. Just
out loud, not qualified to say one way or the other!
>> I also see where this appearance is shown lower in topography in
which, to me, would be odd for slickenside.
>> Jim Wooddell
>> On 5/21/2013 9:18 AM, Jim Baxter wrote:
>>> Slickensides are polished surfaces caused by lateral movement along
plane. In hand specimens they feel rough when you rub your finger in
direction and smooth when you rub it in the other. Not sure that test
feasible on the size specimens most of us own. In theory if the fault
represent planes of weakness along which breaks occur then you could be
both things - slickensides that formed by lateral movement along the
when the stone fractured.
>>> Jim Baxter
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Received on Tue 21 May 2013 05:02:34 PM PDT