To take your logic a bit further both remains and documents are made
up of atoms thus archaeology is a sub-set of atomic physics.
There is also Insurance archaeology to quote from a web site
"originally developed as an asset recovery tool for companies caught
up in two huge waves of retroactive liability claims: asbestos
contamination and environmental cleanup imposed by Superfund
legislation. Companies faced with liability for actions that took
place decades ago discovered that old Comprehensive General Liability
(CGL) policies were applicable if damage occurred within the policy
period. Necessity spurred treasure hunts for the valuable old
policies, and insurance archaeologists developed a specialized set of
tools to aid this search."