Hello Forrester 2,
Yes, there are limitations to the types of sites on TMA. The submission guidelines
http://www.themodernantiquarian.com/submission_guidelines/
say:
"The Modern Antiquarian focuses on megalithic sites and the ancient (i.e. prehistoric) landscape. This means we are not interested in Roman sites, Dark Ages sites, churches etc. unless they have clear prehistoric provenances (and you are prepared to tell us about them)."
There may be some "rogue" sites but we try to eliminate these when they're spotted.
thanks,
TMA Ed.