enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. 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.

3. Geode - Wikipedia

   en.wikipedia.org/wiki/Geode

   Geodes can form in any cavity, but the term is usually reserved for more or less rounded formations in igneous and sedimentary rocks. They can form in gas bubbles in igneous rocks, such as vesicles in basaltic lava; or, as in the American Midwest, in rounded cavities in sedimentary formations.

4. Prism (geology) - Wikipedia

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

   These types of sediments are typically formed during orogenic deformation; for example, the arkose detrital sedimentary rock found in fault troughs. [1] Hexagonal aquamarine prism with stubby quartz prisms. In mineralogy, prismatic is also type of mineral habit (appearance of a crystal). Prismatic minerals have crystals that show a uniform ...

5. 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 ...

6. Sandstone - Wikipedia

   en.wikipedia.org/wiki/Sandstone

   Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains, cemented together by another mineral. Sandstones comprise about 20–25% of all sedimentary rocks. [1] Most sandstone is composed of quartz or feldspar, because they are the most resistant minerals to the weathering processes at the Earth's ...

7. Rock (geology) - Wikipedia

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

   Sedimentary rocks often contain fossils. Sedimentary rocks form under the influence of gravity and typically are deposited in horizontal or near horizontal layers or strata, and may be referred to as stratified rocks. [16] Sediment and the particles of clastic sedimentary rocks can be further classified by grain size.

8. Sedimentology - Wikipedia

   en.wikipedia.org/wiki/Sedimentology

   Energy: petroleum geology relies on the capacity of sedimentary rocks to generate deposits of petroleum oils. Coal and oil shale are found in sedimentary rocks. A large proportion of the world's uranium energy resources are hosted within sedimentary successions. Groundwater: sedimentary rocks contain a large proportion of the Earth's ...

9. Clastic rock - Wikipedia

   en.wikipedia.org/wiki/Clastic_rock

   Major minerals can be categorized into subdivisions based on their resistance to chemical decomposition. Those that possess a great resistance to decomposition are categorized as stable, while those that do not are considered less stable. The most common stable mineral in siliciclastic sedimentary rocks is quartz (SiO 2). [3]