Macnaha qaamuuska ee ereyga "dhibcaha" waa bar yar ama midab midab ah oo ka duwan agagaarka agagaarka. Waxa kale oo ay tilmaami kartaa qayb yar ama laalaab yar oo ka muuqata dusha sare. Erayga waxaa inta badan loo adeegsadaa in lagu qeexo muuqaalka kore ee leh dhibco yaryar oo aan joogto ahayn ama baro midab ama midab kale leh, sida xadhkaha goosashada ee ukunta shimbiraha ama xadhkaha goosashada ee dusha sare ee granite. Falka "dhibcaha" macnihiisu waa in lagu calaamadiyo ama lagu daboolo dhibco yaryar, ama in la sameeyo qaab baro yaryar ama laalaabyo.