> > From: PN Stenquist <[EMAIL PROTECTED]> > Date: 2008/11/27 Thu PM 01:45:43 GMT > To: Pentax-Discuss Mail List <[email protected]> > Subject: Re: GESO: Autumn Memories > > I believe that the leaves are from sycamore tree. Other leaves don't > seem to leave such a distinct impression. > Paul
This seems to be the best answer I can find online. http://biojournalism.com/95-leaf-shadows-stained-concrete.html > On Nov 27, 2008, at 3:42 AM, mike wilson wrote: > > > > >> > >> From: "P. J. Alling" <[EMAIL PROTECTED]> > >> Date: 2008/11/25 Tue PM 04:06:37 GMT > >> To: Pentax-Discuss Mail List <[email protected]> > >> Subject: Re: GESO: Autumn Memories > >> > >> They look like they could be oak leaves, which are full of tannins. > >> That would stain the concrete and eventually be weathered away. > > > > What I find odd is that they are (presumably) quite water soluble, > > to be leached out of the leaf into the concrete by rain or dew but > > then they are not washed away from there. Very, very intriquing. > > The other possibility is that it is a wax covering that is somehow > > being transferred to the concrete and then resisting removal. Plant > > waxes are rather persistent chemicals - carnauba wax, found in many > > polishes until the advent of modern polymers, is/was extracted from > > the surface of leaves. > > > >> > >> mike wilson wrote: > >>>> From: PN Stenquist <[EMAIL PROTECTED]> > >>>> Date: 2008/11/24 Mon PM 06:51:42 GMT > >>>> To: Pentax-Discuss Mail List <[email protected]> > >>>> Subject: Re: GESO: Autumn Memories > >>>> > >>>> Thanks Marnie. I've never seen this kind of impression anywhere > >>>> other > >>>> than the location where I shot these pics. At least I finally got > >>>> around to shooting them:-). BTW, I used the venerable Vivitar > >>>> Series 1 > >>>> 90/2.5 at f4. > >>>> > >>> > >>> Do you know what sort of tree it is? It looks as if there is some > >>> residual resin being leached out and leaving the impression. > >>> > >>> > >>>> On Nov 24, 2008, at 12:58 PM, [EMAIL PROTECTED] wrote: > >>>> > >>>> > >>>>> In a message dated 11/23/2008 5:20:53 P.M. Pacific Standard Time, > >>>>> [EMAIL PROTECTED] writes: > >>>>> Last year, I noticed a strange phenomenon on my morning runs. It > >>>>> seemed that on one short stretch of new concrete, fallen leaves > >>>>> would > >>>>> leave an image that lasted for months after the leaves had blown > >>>>> away. > >>>>> On adjacent surfaces, no images were created. And it seemed > >>>>> that only > >>>>> one type of leaf created these impressions. I was amazed to see > >>>>> that > >>>>> they endured for months, through rain, snow, salting and plowing. > >>>>> This > >>>>> year the process was repeated, and I decided to photograph some > >>>>> of > >>>>> these "autumn memories." > >>>>> Paul > >>>>> > >>>>> http://photo.net/photodb/folder?folder_id=878138 > >>>>> > >>>>> ============== > >>>>> Way cool. I like the two leaves the best (one up, one down). > >>>>> Easier > >>>>> to see > >>>>> what they are. Interesting. Never noticed that anywhere around > >>>>> here. > >>>>> > >>>>> Marnie aka Doe :-) > >>>>> > >>>>> --------------------------------------------- > >>>>> Warning: I am now filtering my email, so you may be censored. > >>>>> > >>>>> **************One site has it all. Your email accounts, your > >>>>> social > >>>>> networks, > >>>>> and the things you love. 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