WebDefinition of fine-grained i. Said of a crystalline rock, and of its texture, in which the individual minerals are relatively small; specif. said of an igneous rock whose particles … WebDefinition: A phenocryst is visible large crystal embedded within a fine-grained matrix of smaller crystals. This combination of matrix and phenocrysts forms a porphyritic rock texture. Shape: euhedral forms: Minimum Size: 0.5 millimeter to be considered a phenocryst, i.e. visibly discernable: Term For Large Phenocrysts: megaphenocrysts: …

Pictures and Descriptions of Igneous Rock Types

WebPumice is produced in two forms: rock pumice and pumicite. "Pumicite" is a name given to very fine-grained pumice (less than 4 millimeters in diameter down to submillimeter sizes). The word can be used … WebClastic rocks are composed of fragments, or clasts, of pre-existing minerals and rock. A clast is a fragment of geological detritus, chunks, and smaller grains of rock broken off other rocks by physical weathering. Geologists use the term clastic to refer to sedimentary rocks and particles in sediment transport, whether in suspension or as bed load, and in sediment … cecilya \\u0026 the candy kings

Quia - Chapter 5: Rocks

Webclassification, a silt is a fine-grained soil, or the fine-grained portion of a soil, with a plasticity index less than 4 or the plot of plasticity index versus liquid limit falls below the "A"-line (figure 3-5). Organic clay —clay with sufficient organic content to in-fluence the soil properties is an organic clay. For classifi- WebGrain Size. Detrital rock is classified according to sediment grain size, which is graded from large to small on the Wentworth scale (see figure).Grain size is the average diameter of sediment fragments in … WebSep 25, 2012 · Fine-grained definition, being of fine grain or texture, as certain types of wood, leather, etc. See more. cecily art