Interesting shot, Heath. They resemble electrical junction boxes linked by a piece of flex conduit, however, I don’t think I have ever seen a junction box mounted anywhere without the completely cut-out side exposed (so you have access to the inside of the box when pulling the wiring).
As Mark surmises, the “patina” is probably a combination of guano and sodium chloride, there is more salt concentration in the Salton Sea than there is in the Pacific Ocean. (Wondering how sodium chloride might react with urea).
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