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" <[EMAIL PROTECTED]> To: "Michel Franco" <[EMAIL PROTECTED]>; "Meteorite List" <[EMAIL PROTECTED]> 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" <[EMAIL PROTECTED]> > To: "Meteorite List" <[EMAIL PROTECTED]> > 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 > > > > > > ______________________________________________ > > Meteorite-list mailing list > > [EMAIL PROTECTED] > > http://www.pairlist.net/mailman/listinfo/meteorite-list > > > > > ______________________________________________ > Meteorite-list mailing list > [EMAIL PROTECTED] > http://www.pairlist.net/mailman/listinfo/meteorite-list > ______________________________________________ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
