Hertzian cone
cone of material removed by impact force propagating through a brittle, amorphous or cryptocrystalline solid material
en-US/ˈhɛɹtsiən ˈkoʊn/
en-GB/ˈhɜːtsɪən ˈkəʊn/
cone of material removed by impact force propagating through a brittle, amorphous or cryptocrystalline solid material