[blam]

"like 'Tells' in the Middle East?"

I think Tells are different than the pyramids at Caral. The Tells have several distinct levels of occupation...I think Caral shows only one level of occupation.

[Fred Nerks]

I meant in appearance...covered in (alluvial?) material...

Tell Ubaid, for example.

http://oi.uchicago.edu/OI/IS/SANDERS/PHOTOS/meso_map.html