In the basin ring just at the E point, was a medium-sized elliptical basin containing an otherwise unmodified rough stone cobble.  This appears at bottom central portion of the picture.  This was dubbed early-on as the “Eyeball Stone” by the site surveyor, and soon took on a life of its own as a “key” element in promoting the “Maya Observatory Thesis” which did so much (IMO) to obscure the nature of this site, and eventual resolutions about it.  Its supporters further likened it to the Maya glyph for zero; the “Eye-of-Day” greeting the eastern sun, etc etc.  And it was a key feature in the abortive “astronomical sighting” lines thesis.  Writers unfamiliar with the site soon endowed it with an iris, etc. etc.  It has its “believers” still, I suppose, but none have ever demonstrated their assertions at all.  The backhoe trench cuts through left to right just above the “Eyeball Stone” and further on can be seen a very rough natural karstic opening into the limestone bed.  This is just this side of a remnant building footer wall, left intact during excavation.  Atop the footer lies a painted scale board which provided a scale register in helicopter and  overhead shots from cranes.  The alternate b&w  rectangles are 1ft. markers; toward the N end (right) they become .5 ft. markers.