Two premises taken as fact by YECs:
1. All rocks are either hardened lava or hardened mud.
2. Rock cannot be bent and shaped by great pressure over time.
Both premises are false. The entire island on which I live is evidence against both.
Limestone, granite, marble, jade--you don't get these things in a year from hardened mud. These are formed by certain processes involving heat and pressure and time. Rock can be, and has been, observably bent and shaped by such processes.
Creationists have yet to run an experiment in which jade is produced in a year from 'flood-like processes.' But if their scenario had any connection with reality they should be able to do this without much trouble. Where is the jade?