Here's a
decoding of the crop formation, showing a couple of Mesoamerican
symbols compared to the formation:
the Maya symbol for jaguar snouts, which indicates the entrance
to the underworld:

The symbol for the sun:

The circles appear to be all eclipsed which seems to indicate
the narrative is the passing away of the fifth sun into the
underworld. Which is Mayan terms refers to the birth of the 6th
Sun. Note how the poles of each sun are connected to the
Circle-dot in the centre = God force or source
UPDATE:- 31/07/2010
.
I
wonder if you would like to add this (compelling) additional
piece of information to my previously submitted comments as
it now completes the puzzle as the reported date of the
formation is:
Xul marks the end of the seasonal year when
the sun finished its journey southward and 13 the last
month.
Interestingly, according to
Dr. José Argüelles:
"July 25, the Gregorian Calendar date of the
Day Out of Time, is the 365th day of the year of the
Thirteen Moon Calendar. This harmonic timing standard
measures the year in thirteen even months of 28 days each, a
perpetual calendar of 52 perfect weeks, making a total of
364 days."
I feel confident that the message being conveyed in the
field is very clear the passing away of the 5th Sun.