What is argilacious rock?

Argilaceous rock is a type of sedimentary rock that is primarily composed of clay minerals. These rocks typically form from the accumulation and compaction of fine-grained sediments, often in marine or freshwater environments. Examples of argilaceous rocks include shale and mudstone, which can exhibit distinct layering and may contain fossils or other organic material. Due to their fine texture, these rocks are often used in the production of ceramics and bricks.