by Gelogia Team | Feb 14, 2025 | Physical Geology & Geomorphology
Sphericity measures how closely a particle’s shape resembles a sphere. It helps in understanding grain durability, transport history, and geological processes. A perfect sphere has a sphericity of 1.00, while other shapes have lower values. This concept is crucial in...
by Gelogia Team | Feb 13, 2025 | Economic Geology
Grain size classifies sedimentary particles from coarse gravel to fine clay using scales like Udden’s and Atterberg’s. Analysis methods include direct measurement, sieving, microscopy, and settling tubes, based on particle size. Understanding grain size helps in...
by Gelogia Team | Feb 13, 2025 | Structural Geology
When analyzing sediment, a percentile helps determine the grain size at a specific weight percentage. It’s found by plotting data on a cumulative curve and is essential for understanding sediment distribution. By using histograms, probability curves, and frequency...
by Gelogia Team | Feb 12, 2025 | Petrology
Intergrowth texture forms when two minerals crystallize together or through exsolution in igneous rocks. Common types include graphic, myrmekite, exsolution, cavity, radiate, reaction, and pegmatite textures, each revealing mineral interactions and cooling history....
by Gelogia Team | Feb 11, 2025 | Physical Geology & Geomorphology
The textures of igneous rock define their crystallinity, grain size, and crystal relations, reflecting their cooling history and formation conditions. Various types of textures of igneous rock: (A) Crystallinity: Defines the degree of crystallization. Holocrystalline:...
