What is "hauerland"

Hauerland (also called Kremnitz-Deutschprobener Sprachinsel) is the German name for a region presently located in central Slovakia once inhabited by Carpathian Germans. Arisen from medieval Ostsiedlung population movements, it belonged to three German language islands within a greater Slovakian-speaking area. The other two were situated in Bratislava (Pressburg) and the Spiš (Zips) region.