What is the name for the calcareous marlstone soil particularly esteemed in Collio and Colli Orientali del Friuli?

Answer

ponca

The *ponca* soil, which is a calcareous marlstone found prominently in areas like Collio, is highly esteemed because it imparts complexity and structure to the white wines grown there.

What is the name for the calcareous marlstone soil particularly esteemed in Collio and Colli Orientali del Friuli?
beverageWineFriuliviticulture