Wiktionary
crustlike
a. Resembling or characteristic of a crust.
WordNet
Usage examples of "crustlike".
With her open palm she slapped at the surface of the lens—and her hand broke through a crustlike surface and sank into a thick, moldering mess.
The blood over Yeager's left eye had been baked into a crustlike shield.
Squinting in the bruised light, Molly saw patches of a blackish thallus, flecked with green, growing on the trunk in crustlike forms.