It is likely a type of metamorphic rock, such as schist or gneiss, which form under high temperature and pressure conditions leading to the alignment of mineral grains into flat layers.
Sedimentary rocks have flat layers.
schist
Granite, a type of igneous rock, can metamorphose into gneiss when exposed to high temperatures and pressure. Gneiss is a foliated metamorphic rock with distinct layers or banding due to the rearrangement of minerals under heat and pressure.
Schistose Structure metamorphic rocks are known as foliated metamorphic rock.
Foliated rock
It is likely a type of metamorphic rock, such as schist or gneiss, which form under high temperature and pressure conditions leading to the alignment of mineral grains into flat layers.
Foliated rock has parallel layers.
Sedimentary rocks have flat layers.
slateschist
That would be sedimentary rock, and (honorable mention) occasionally metamorphic rock.
Rase
Foliated.
schist
Those would be non-foliated metamorphic rocks, like quartzite and marble.
A metamorphic rock.
Non-foliated metamorphic rock, such as marble or quartzite, is characterized by the absence of visible layering or banding. The mineral grains in these rocks recrystallize and grow in a uniform manner, without forming distinct layers like in foliated rocks. This type of metamorphism typically occurs under conditions of high pressure and temperature without the presence of directed stress.