[meteorite-list] Slikensides ?

From: John Divelbiss <j.divelbiss_at_meteoritecentral.com>
Date: Thu Apr 22 10:18:29 2004
Message-ID: <000d01c2d95f$940e97a0$180a5a0c_at_0m824>

Bill,

Thank you for this informative response. I have a nice chunk of Zag that has
one surface that looked like a slickenslide...but I've had doubts because it
looked smooth/polished, and I was thinking these subtle striations should be
grooves with edges. Not the case by your answer.

If I can get a good picture of it this weekend, I'll send it to Jeff in
Australia and see if he'll put on his site. Thanks again for clarification
for all of us.

John

----- Original Message -----
From: "Bill Mason III" <bmason3_at_attbi.com>
To: "Michel Franco" <michel_at_caillou-noir.com>; "Meteorite List"
<meteorite-list_at_meteoritecentral.com>
Sent: Friday, February 21, 2003 12:29 AM
Subject: Re: [meteorite-list] Slikensides ?


> Michel,
> Perhaps I can give you an insight into just what "slickensides" are
all
> about. A slickenside is a fault surface or fault-plane which exhibits
> movement and dislocation,frequently warped,broken,and frequently offset.
> When you see a true slickensides it is polished because the sliding
surfaces
> are under great pressure as they move slowly, opposing surfaces are
polished
> and often striated grooved.
> If you are thinking of impact structure you will most likely find
> evidence of directional striations as in a dynamite exposition but you
will
> not see the polishing as evidenced in slickenside.
> Bill Mason
>
> ----- Original Message -----
> From: "Michel Franco" <michel_at_caillou-noir.com>
> To: "Meteorite List" <meteorite-list_at_meteoritecentral.com>
> Sent: Thursday, February 20, 2003 1:00 AM
> Subject: [meteorite-list] Slikensides ?
>
>
> > Dear list
> >
> > I am looking for information about SLIKENSIDE formation.
> >
> > Does they come from a shock in the cosmos or do they form when landing
on
> > Earth ?
> >
> > Any detail will be appreciated.
> >
> > Thank's in advance.
> >
> > Best regards
> >
> > Michel FRANCO
> >
> >
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> >
>
>
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Received on Thu 20 Feb 2003 11:13:22 PM PST