"... it turned out to be from a can of expansion foam the builders had left in the yard. water got to the can which rusted and leaked, causing the foam to reach the surface."
Technically a buried can of expansion foam, these are quick fillers while we wait for the next pic, did I break the rules?
They are objects of interest, I have no personal care who photographed them or how, and I personally find it more stimulating trying to work out what something is when it's not an abstract image.
Name the item in the photo, whoever gets it right posts one of their close-up items up and so on..
First time I won anything! Yay!
I'll get something sorted this evening. Sorry, work...