Clay is a type of fine-grained natural soil material containing clay minerals [1] (hydrous aluminium phyllosilicates, e.g. kaolinite, Al 2 Si 2 O 5 (OH) 4). Most pure clay minerals are white or light …

Apr 10, 2025 · Clay, soil particles the diameters of which are less than 0.005 millimeter; also a rock that is composed essentially of clay particles. Rock in this sense includes soils, ceramic …

Hexagonal sheets of the clay mineral kaolinite (SEM image, 1,340× magnification) Clay is a very fine-grained geologic material that develops plasticity when wet, but becomes hard, brittle and …

clay mineral, any of a group of important hydrous aluminum silicates with a layer (sheetlike) structure and very small particle size. They may contain significant amounts of iron, alkali …

May 1, 2023 · Clay minerals are a group of minerals that are typically found in soils, sediments, and rocks. They are characterized by their small particle size, which is typically less than 2 …

Mar 21, 2024 · Claystone is a sedimentary rock composed primarily of clay-sized particles, which are minerals that are less than 0.004 millimeters in diameter. It belongs to the broader …

Claystone, hardened clay. Some geologists further restrict the term to a sedimentary rock that is composed primarily of clay-sized particles (less than 1256 millimetre in diameter) and is not …

Jan 5, 2023 · The clay is a hard, tough, refractory clay consisting chiefly of the clay mineral kaolinite. Flint clay will not mix with water, and lacks the chief characteristic of clay: plasticity.

Mar 28, 2023 · Claystone is a clastic form of sedimentary rock. It primarily consists of tiny particles cemented into hard rock with a size of less than 1/256 mm. In terms of size, Claystone is …

The types of clay minerals found in weathering rocks strongly control how the weathered rock behaves under various climat-ic conditions (such as humid-tropical, dry-tropical, and …