Lower Ordovician
preferred label: اردویسین زیرین @fa
type: Concept
related: Lashkarak formation

Alborz Zone
preferred label: زون البرز @fa
type: Concept
related: Lashkarak formation

Lashkarak formation
related: Ordovician
related: Middle Ordovician
related: Lower Ordovician
related: Alborz Zone
related: Paleozoic
preferred label: سازند لشکرک @fa
type: Concept

Paleozoic
preferred label: پالئوزوئیک(دوران) @fa
type: Concept
related: Lashkarak formation

Ordovician
preferred label: اردویسین @fa
type: Concept
related: Lashkarak formation

Middle Ordovician
preferred label: اردویسین میانی @fa
type: Concept
related: Lashkarak formation