[muawiyah]

http://www.physorg.com/news198905435.html ~ Should get you started. These were grave sites considerably different from what American Indians were doing.

[blam]

Pre-Columbian Burial Ground Unearthed In Costa Rica

Thanks. I'm reminded of this book (more Japanese) and, the timing is close to the Costa Rico site:

The Zuni Enigma

BTW, a decent book.