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2. Texture (geology) - Wikipedia

   en.wikipedia.org/wiki/Texture_(geology)

   In geology, texture or rock microstructure [1] refers to the relationship between the materials of which a rock is composed. [2] The broadest textural classes are crystalline (in which the components are intergrown and interlocking crystals), fragmental (in which there is an accumulation of fragments by some physical process), aphanitic (in which crystals are not visible to the unaided eye ...

3. Sedimentary rock - Wikipedia

   en.wikipedia.org/wiki/Sedimentary_rock

   Uluru (Ayers Rock) is a large sandstone formation in Northern Territory, Australia.. Sedimentary rocks can be subdivided into four groups based on the processes responsible for their formation: clastic sedimentary rocks, biochemical (biogenic) sedimentary rocks, chemical sedimentary rocks, and a fourth category for "other" sedimentary rocks formed by impacts, volcanism, and other minor processes.

4. List of rock textures - Wikipedia

   en.wikipedia.org/wiki/List_of_rock_textures

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5. Clastic rock - Wikipedia

   en.wikipedia.org/wiki/Clastic_rock

   Claystone from Montana. Clastic sedimentary rocks are rocks composed predominantly of broken pieces or clasts of older weathered and eroded rocks. Clastic sediments or sedimentary rocks are classified based on grain size, clast and cementing material composition, and texture.

6. List of rock types - Wikipedia

   en.wikipedia.org/wiki/List_of_rock_types

   Claystone – Clastic sedimentary rock composed primarily of clay-sized particles; Coal – Combustible sedimentary rock composed primarily of carbon; Conglomerate – Sedimentary rock composed of smaller rock fragments; Coquina – Sedimentary rock that is composed mostly of fragments of shells; Diamictite – Type of sedimentary rock

7. Lithology - Wikipedia

   en.wikipedia.org/wiki/Lithology

   The three major rock types are igneous, sedimentary, and metamorphic. Igneous rocks are formed directly from magma, which is a mixture of molten rock, dissolved gases, and solid crystals. Sedimentary rock is formed from mineral or organic particles that collect at the Earth's surface and become lithified. Metamorphic rock forms by ...

8. Matrix (geology) - Wikipedia

   en.wikipedia.org/wiki/Matrix_(geology)

   The matrix or groundmass of a rock is the finer-grained mass of material in which larger grains, crystals, or clasts are embedded. The matrix of an igneous rock consists of finer-grained, often microscopic, crystals in which larger crystals, called phenocrysts, are embedded. This porphyritic texture is indicative of multi-stage cooling of magma.

9. Maturity (sedimentology) - Wikipedia

   en.wikipedia.org/wiki/Maturity_(sedimentology)

   In sedimentary geology, maturity describes the composition and texture of grains in clastic rocks, most typically sandstones, resulting from different amounts of sediment transportation. A sediment is mature when the grains in a sediment become well-sorted and well-rounded due to weathering or abrasion of the grains during transport.