en_tn_condensed/job/28/09.md

A man lays his hand on the flinty rock

AT: "A man digs into the flinty rock;" (See: rc://en/ta/man/translate/figs-metonymy)

flinty rock

"hard rock"

he overturns mountains by their roots

The man who digs for valuable rocks exposes the "roots" of the mountain by digging into it.