Actually this was on a History Channel show.
America Unearthed a pretty bogus show by a so called ‘forensic geologist’ Scott Wolter. 1 step above ancient aliens. Though some of the episodes including this one is ok
Saw that show. Was very UNimpressed.
I like America Unearthed, its host Scott Wolter seems blissfully unaware of any work done on some of the artifacts. Most recently I watched the episode about those lead crosses in the caliche’, which were examined in the 1970s by Barry Fell. Fell’s conclusion (it’s around here somewhere, in a written reply he very kindly sent) was that the “Latin” (he also put it in quotes) was made up of snippets of the Latin mottos (including the abbreviations) of various noble families of Europe, and translated into gibberish. Clearly they are some kookiness, even if not a hoax.