03-22-2023, 09:46 PM
Interesting guesses Michael; so sorry but neither is correct.
Don't blame me - I didn't vote for him!
Nikon D7500 with Nikkor 18-300 mm; PSE2021, PSCS5
Ny Flickr Albums
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WhatIzIt ???
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 Don't blame me - I didn't vote for him! Nikon D7500 with Nikkor 18-300 mm; PSE2021, PSCS5 Ny Flickr Albums
03-23-2023, 12:31 AM
Some sort of sensor?
03-23-2023, 12:36 AM
No, not any kind of sensor. In fact not any kind of man-made item.
Don't blame me - I didn't vote for him! Nikon D7500 with Nikkor 18-300 mm; PSE2021, PSCS5 Ny Flickr Albums 
03-23-2023, 11:19 AM
Well, I was going to guess a tire rubbing protector but guess not.
03-23-2023, 12:10 PM
Where is Natalie when we need her?
I am stumped, Dave. 
03-23-2023, 01:51 PM
Some sort of deposit at a high water line. Perhaps alkaline?
03-23-2023, 04:00 PM
You are very close, Quint.
Yes, water did transport the yellow stuff which was left behind when the water evaporated. I don't know about the chemical composition, so I can't say if it's an alkaline substance. But can anyone guess, in general terms, just what the yellow stuff is? Don't blame me - I didn't vote for him! Nikon D7500 with Nikkor 18-300 mm; PSE2021, PSCS5 Ny Flickr Albums
Salt ? wheat? Soy bean?
03-23-2023, 07:17 PM
I'm afraid even I don't have a clue......some kind of glow in the dark line embedded in curb to make it more visible? I just reread the other guesses. The line does not look yellow to me. However I am going to guess very heavy pollen.
03-23-2023, 11:32 PM
Yellow? Some sort of CAT wire then?
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