type site

noun2

1. •
   An archaeological site considered the representative example of a particular culture, frequently its first discovery and frequently used as its eponym

   • The Late Bronze Age assemblage to which the type site offers no significant parallel. — 1935
2. •
   A geologic site considered the representative example or first discovery of a stratographic level or other feature

   • Each interglacial is named after a type site or area where deposits of that stage occur. — 1975