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  2. List of rock types - Wikipedia

    en.wikipedia.org/wiki/List_of_rock_types

    List of rocks on Mars – Alphabetical list of named rocks and meteorites found on Mars; Rock cycle – Transitional concept of geologic time; List of rock formations: for a list of unusual or culturally significant rock outcrops; Leaverite – Rock in the field that looks interesting but is actually not

  3. Bed (geology) - Wikipedia

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

    In geology, a bed is a layer of sediment, sedimentary rock, or volcanic rock "bounded above and below by more or less well-defined bedding surfaces". [1] A bedding surface or bedding plane is respectively a curved surface or plane that visibly separates each successive bed (of the same or different lithology ) from the preceding or following bed.

  4. List of rock formations - Wikipedia

    en.wikipedia.org/wiki/List_of_rock_formations

    Rocks formations and the Dedo de Deus (God's Finger) peak in the background, Serra dos Órgãos National Park, Rio de Janeiro state, Brazil Raouché or Pigeons' Rock in Beirut, Lebanon Druid Arch, Canyonlands National Park, Utah, US View of Meteora, Greece Rock formations in Ongamira Valley, Sierras de Córdoba, Argentina Belogradchik Rocks, Balkan Mountains, Bulgaria "Jaws", an erosional fin ...

  5. Lameta Formation - Wikipedia

    en.wikipedia.org/wiki/Lameta_Formation

    The first fossils found in the Lameta Formation were discovered between 1917 and 1919. [2]The Lameta Formation was first identified in 1981 by geologists working for the Geological Survey of India (GSI), G. N. Dwivedi and Dhananjay Mahendrakumar Mohabey, after being given limestone structures–later recognised as dinosaur eggs–by workers of the ACC Cement Quarry in the village of Rahioli ...

  6. Lamproite - Wikipedia

    en.wikipedia.org/wiki/Lamproite

    Sample of lamproite [1]. Lamproite is an ultrapotassic mantle-derived volcanic or subvolcanic rock.It has low CaO, Al 2 O 3, Na 2 O, high K 2 O/Al 2 O 3, a relatively high MgO content and extreme enrichment in incompatible elements.

  7. Lamella (materials) - Wikipedia

    en.wikipedia.org/wiki/Lamella_(materials)

    A lamella (pl.: lamellae) is a small plate or flake, from the Latin, and may also refer to collections of fine sheets of material held adjacent to one another in a gill-shaped structure, often with fluid in between though sometimes simply a set of "welded" plates.

  8. Formation of rocks - Wikipedia

    en.wikipedia.org/wiki/Formation_of_rocks

    Primitive rocks are common on the surfaces of many asteroids, and the majority of meteorites are primitive rocks." [1]: 145 Widmanstätten pattern in an iron-rich meteorite. An example of a primitive rock is the achondritic iron-nickel octahedrite mineral seen in the Widmanstätten pattern that is found in a number of iron-rich meteorites.

  9. Sedimentary structures - Wikipedia

    en.wikipedia.org/wiki/Sedimentary_structures

    Sedimentary structures include all kinds of features in sediments and sedimentary rocks, formed at the time of deposition.. Sediments and sedimentary rocks are characterized by bedding, which occurs when layers of sediment, with different particle sizes are deposited on top of each other. [1]

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