Guess what? Even "answersingenesis" says metamorphic rocks were once sedimentary!
http://www.answersingenesis.org/creation/v27/i3/canyon.asp
"Clearly visible in the walls of the Inner Gorge are spectacular light-coloured rocks, such as the pink granites,1 which stand out starkly against the darker, metamorphic rocks2 (figures 1 and 2). The latter are former sedimentary and volcanic layers that have been transformed (metamorphosed) by heat and pressure during intense geologic upheavals in the past."
;-)
(Of course, they misrepresent the ages, but that is to be expected...)
In the past six thousand years, that is. People who think the world is only 6K years old actually believe in very fast transformations. Geologic processes have to happen very fast to get to the Earth we have, in this model. The ark animals have to evolve very quickly to get the Earth we have, in this model.
This model doesn't work, I'd say.