This kind of surface is common in Western Europe , but is rare in North America and Eastern Europe . This type of surface is common in Western Europe , but is considered rare in North America and Eastern Europe .
Permukaan seperti ini biasa di Eropah Barat, tetapi jarang berlaku di Amerika Utara dan Eropah Timur. Jenis permukaan ini biasa di Eropah Barat, tetapi dianggap jarang berlaku di Amerika Utara dan Eropah Timur.