Lamination errors are the result of minor impurities in the blanking strip, which spread out within the strip when it is rolled to thickness.
It's a bit like putting a soft blob of butter between two slices of bread, and rolling those together with a rolling pin. The butter spreads out between them.
Lamination errors can express themselves in two ways:
1. Surface peeling, as you see here, and
2. Complete flan splitting, which in the worst cases, results in the coin splitting into halves, each half carrying a complete obverse or reverse design.