Metamorphic rock derived from contact metamorphism of argillaceous or siliceous rocks often exhibits a distinctive, fine-grained texture and may possess enhanced hardness and durability. For instance, the alteration of shale or chert in proximity to an igneous intrusion can result in such transformations, influencing its suitability for various applications.
The resulting characteristics of these transformed rocks can be significant in several fields. Historically, these materials have been utilized for toolmaking due to their toughness. Furthermore, their resistance to weathering and erosion makes them suitable for building materials and in modern applications for specialized industrial processes. Understanding the geological processes involved in their formation is crucial for predicting their occurrence and effectively utilizing their unique attributes.
