would love to excavate something older than 150 years old, and more substantial than broken dart points and ochre.
I've done the concrete desert digging in New Mexico, and I can't tell which is worse, the gravel pit or the caliche. Both are probably better than one job where I worked outside in 5 degree weather, on the shore, with a wind chill around -20.
Yikes black soil gumbo sounds pretty nasty. I did work on an 18th-19th century cemetery that had some pretty nasty (and greasy) soil. That was ... err ... not fun. It also had a 'vampire' associated with it, which made it a lot more interesting.
http://users.net1plus.com/vyrdolak/NEfolkbelief.htm