encrustment

encrustment

or

incrustment

n
an outer layer of crust
References in periodicals archive ?
Spawning aggregations of sheepshead are clustered around just about every coastal structure that's hard enough to sport an encrustment of barnacles and oysters.
1999) included soft shell (shell soft and pliable), new hard shell (firm to hard shell that lacked wear or encrustment), old shell (wear and encrustment present) and very old shell (extensive signs of shell wear and encrustment).
The 50th anniversary of the Kindertransport stimulated the inner experience of many Kindertransportees, causing a sort of psychic encrustment to dissolve, allowing them to reflect on their early experiences and face the ways in which it had changed their lives.