They look like they could be oak leaves, which are full of tannins.
That would stain the concrete and eventually be weathered away.
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 :-)
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