PSD (Post Strike Damage), also called
PMD (Post Minting Damage).
Think about the minting process - two largely flat surfaces (the dies) press on a small metal disk with tons of force. This cannot raise metal above the flat parts of the dies like the damage near the date has.
But after strike, when there aren't the dies being pushed flat, it's easy to raise metal.
-----Burton
50+ year / Life / Emeritus
ANA member (joined 12/1/1973)
Life member: Numismatics International, CONECA
Member: TNA, FtWCC, NETCC, EveryCountry (online) coin club
Owned by three cats and a wife of 40+ years (joined 1983)
Author: 3rd Edition of the Sample Slabs book,
https://www.sampleslabs.info/