Argillaceous Rocks

Argillaceous rocks are sedimentary rocks primarily composed of clay-sized particles, which are very fine-grained minerals like clay and silt. These rocks form from the accumulation of mud and clay in calm environments such as lakes, lagoons, or deep seas. Common examples include shale, mudstone, and claystone. They are often layered and can become shale when compressed over time. These rocks are important in geology and resource industries because they can contain fossils, serve as natural barriers for oil and gas, and are used in construction materials like bricks and tiles.