Lutite

Lutite refers to a fine-grained sedimentary rock composed primarily of clay minerals and silt-sized particles, typically with a grain size less than 0.0625 mm (62.5 micrometers). It encompasses shale, mudstone, claystone, and siltstone, distinguishing them from coarser-grained sedimentary rocks like sandstone or conglomerate. Lutites often form in low-energy environments like lakes, lagoons, and deep-sea basins, where fine particles settle and accumulate over time. These rocks often exhibit layering (bedding) and may contain fossils or organic matter. The term 'lutite' emphasizes texture and composition, reflecting the fine-grained nature of the rock. They are prone to weathering and erosion, particularly in areas with fluctuating moisture.

Lutite meaning with examples

• Geologists analyzed the core sample, identifying a significant layer of lutite, indicating a past depositional environment of a quiet, shallow lake. The lutite, rich in organic matter, hinted at abundant aquatic life, potentially revealing clues about the ancient ecosystem.
• The quarry revealed a vast deposit of lutite, showcasing distinct bedding planes that highlighted periods of sediment accumulation and varying compositions within the fine-grained rock. The uniform texture suggested a consistent depositional environment over an extended period.
• During the excavation, the workers carefully extracted fragile fossils from the surrounding lutite matrix. The fine-grained nature of the lutite preserved delicate details of the ancient organisms, providing valuable paleontological insights.
• The construction project required stabilization measures due to the presence of lutite in the subsurface. The clay minerals in the lutite could become unstable when exposed to moisture leading to soil expansion and potential settlement, necessitating engineering solutions.