tectonic tectonic /tɛkˈtɑːnɪk/

adjective

1. Of or pertaining to construction or architecture  ( architectonic , tectonic )
   of or pertaining to construction or architecture
   
2. (geology) pertaining to the structure or movement of the earth's crust  ( tectonic )
   (geology) pertaining to the structure or movement of the earth's crust
    Tectonic plates
   tectonic plates
    Tectonic valleys
   tectonic valleys