Slate forms from shale under pressure.
Slate is formed from the metamorphism of shale or mudstone. This process involves intense heat and pressure which causes the shale to recrystallize into a fine-grained, foliated rock with excellent cleavage properties.
Slate is the metamorphic rock formed from shale. A pile of mud can turn into shale (a fine-grained sedimentary rock) with relatively low pressure, about 3 mi (5 km) down into the earth. With more pressure and some heat, shale can transform into slate. Metamorphic rock found closer to Earth's surface, or produced by low pressure, characteristically splits or flakes into layers of varying thickness. This is called foliation. Slate is often used as roofing tiles and paving stones.
Heat and pressure change shale into metamorphic rock, specifically slate when exposed to low to moderate levels of heat and pressure, and then further into phyllite, schist, and gneiss as the intensity of heat and pressure increases.
Gneiss is a metamorphic rock. It is formed form another metamorphic rock called schist (sh-ist). Schist is formed form fine grained sedimentary rock (often shale). While gneiss is formed by great pressure from moving plates of the earth's crust.
A nonfoliated rock formed by contact metamorphism of a shale or mudstone is called hornfels. It usually has a fine-grained texture and lacks the layering characteristic of foliated rocks. Hornfels forms when the parent rock is subjected to high temperatures and pressures near a magma intrusion.
gneiss
Slate is the metamorphic rock that forms from shale after it is exposed to heat and pressure for a llllloooooonnnnnnnggggg time.
Shale can metamorphose through heat and pressure into slate.
Slate is the metamorphic rock, formed from regional (heat and pressure applied) metamorphism on shale.
Shale that is exposed to high temperature and pressure and turned to slate is an example of the metamorphic process.
Slate is formed from the metamorphism of shale or mudstone. This process involves intense heat and pressure which causes the shale to recrystallize into a fine-grained, foliated rock with excellent cleavage properties.
Slate and shale have the same make-up. Slate is formed from sedimentary shale by pressure and heat. Wet shale has the same smell that wet slate has.
Slate is the metamorphic rock formed from shale. A pile of mud can turn into shale (a fine-grained sedimentary rock) with relatively low pressure, about 3 mi (5 km) down into the earth. With more pressure and some heat, shale can transform into slate. Metamorphic rock found closer to Earth's surface, or produced by low pressure, characteristically splits or flakes into layers of varying thickness. This is called foliation. Slate is often used as roofing tiles and paving stones.
Slate is metamorphosed shale.
Mud came first, as it is the raw material from which shale is formed. Shale is a sedimentary rock that forms from compacted and hardened mud over time due to pressure and heat.
When shale and basalt are subjected to low-grade metamorphism, the mineral formed is typically clay minerals, particularly illite or chlorite. In the case of basalt, the alteration can lead to the formation of minerals like zeolites as well. The metamorphic process involves the recrystallization of existing minerals under heat and pressure, resulting in these secondary minerals.
Yes, compaction is a key process in the formation of shale. Shale is typically formed from the compaction of fine-grained sedimentary particles, such as clay and silt, over time. The pressure from the overlying layers compacts these particles into a solid rock, creating shale.