Hornfels is a fine-grained, non-foliated metamorphic rock formed by the contact metamorphism of clay-rich sedimentary rocks, typically exhibiting a dense, hard texture. It is characterized by its resistance to weathering and erosion, making it useful in construction and as a dimension stone.

Hornfels

Fine-grained metamorphic rock

non-foliated metamorphic rock

Contact metamorphism occurs when rocks are heated by proximity to magma or lava, resulting in mineralogical and textural changes. This process typically affects a localized area and leads to the formation of non-foliated metamorphic rocks such as hornfels and marble.

contact metamorphism

clay-rich sedimentary rocks

Dense hard texture

resistance to weathering

Resistance to erosion

useful in construction

dimension stone

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