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- https://geo.libretexts.org/Courses/SUNY_Potsdam/Sedimentary_Geology%3A_Rocks_Environments_and_Stratigraphy/03%3A_Describing_Sediment_and_Sedimentary_Rocks/3.01%3A_Grain_SizeThe size of the particles that make up clastic sediment and sedimentary rocks is an important characteristic. The size of the particles can be measured in a variety of ways and those measurements are...The size of the particles that make up clastic sediment and sedimentary rocks is an important characteristic. The size of the particles can be measured in a variety of ways and those measurements are the basis for descriptive terms. Sorting describes the uniformity of grain size in a specimen.
- https://geo.libretexts.org/Courses/SUNY_Potsdam/Sedimentary_Geology%3A_Rocks_Environments_and_Stratigraphy/05%3A_Siliciclastic_Sedimentary_Rocks/5.01%3A_SandstonesSandstones are made largely of sand-sized grains between 1/16 and 2 mm. They are composed of framework grains and have interstitial matrix, cement, and or pore space between these grains. They are c...Sandstones are made largely of sand-sized grains between 1/16 and 2 mm. They are composed of framework grains and have interstitial matrix, cement, and or pore space between these grains. They are classified based on the relative abundance of quartz, feldspar, and lithic grains and the nature of the interstitial materials.
- https://geo.libretexts.org/Courses/SUNY_Potsdam/Sedimentary_Geology%3A_Rocks_Environments_and_Stratigraphy/08%3A_Diagenesis/8.02%3A_Diagenetic_StructuresA variety of distinctive structures form in association with diagenesis. Beyond being potentially visually striking features, these structures record processes such as the precipitation of minerals, ...A variety of distinctive structures form in association with diagenesis. Beyond being potentially visually striking features, these structures record processes such as the precipitation of minerals, dissolution, surface processes, and bioturbation.
- https://geo.libretexts.org/Courses/University_of_California_Davis/GEL_056%3A_Introduction_to_Geophysics/Geophysics_is_everywhere_in_geology.../02%3A_Diffusion_and_Darcy's_Law/2.05%3A_Darcy's_Law_-_Flow_in_a_Porous_MediumDarcy's law is crucial to understanding many branches of geology, especially hydrogeology. Before we look at the law and what it can tell us, let's look at how it was developed. Darcy's law is named a...Darcy's law is crucial to understanding many branches of geology, especially hydrogeology. Before we look at the law and what it can tell us, let's look at how it was developed. Darcy's law is named after Henry Darcy, a 19th century French engineer who developed an underground pressurized pipe system to deliver water around the city of Dijon. The system, which also provided water to the famous Dijon fountains, revolutionized city water and sewage systems and was driven purely by gravity.
