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  2. Turquoise - Wikipedia

    en.wikipedia.org/wiki/Turquoise

    The turquoise is also a stone in the Jewish High Priest's breastplate, described in Exodus chapter 28. The stone is also considered sacred to the indigenous Zuni and Pueblo peoples of the American Southwest. [34] [35] The pre-Columbian Aztec and Maya also considered it to be a valuable and culturally important stone. [36]

  3. Lithic fragment (geology) - Wikipedia

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

    Lithic fragments, or lithics, are pieces of other rocks that have been eroded down to sand size and now are sand grains in a sedimentary rock.They were first described and named (in their modern definitions) by Bill Dickinson in 1970. [1]

  4. Lithic sandstone - Wikipedia

    en.wikipedia.org/wiki/Lithic_sandstone

    Lithic sandstones can have a speckled (salt and pepper) or gray color, and are usually associated with one specific type of lithic fragment (i.e., igneous, sedimentary, or metamorphic). [ 1 ] Tectonically, lithic sandstones often form in a wide variety sedimentary depositional environments (including fluvial , deltaic , and alluvial sediments ...

  5. List of sandstones - Wikipedia

    en.wikipedia.org/wiki/List_of_sandstones

    This is a list of types of sandstone that have been or are used economically as natural stone for building and other commercial or artistic purposes. Trans-regional [ edit ]

  6. Sandstone - Wikipedia

    en.wikipedia.org/wiki/Sandstone

    Feldspathic sandstones are commonly immature or sub-mature. [1] These sandstones occur in association with cratonic or stable shelf settings. [1] Feldspathic sandstones are derived from granitic-type, primary crystalline, rocks. [1] If the sandstone is dominantly plagioclase, then it is igneous in origin. [1]

  7. Conglomerate (geology) - Wikipedia

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

    They are closely related to sandstones in origin, and exhibit many of the same types of sedimentary structures, such as tabular and trough cross-bedding and graded bedding. [ 1 ] [ 2 ] [ 3 ] Fanglomerates are poorly sorted, matrix-rich conglomerates that originated as debris flows on alluvial fans and likely contain the largest accumulations of ...

  8. QFL diagram - Wikipedia

    en.wikipedia.org/wiki/Qfl_diagram

    A QFL diagram or QFL triangle is a type of ternary diagram that shows compositional data from sandstones and modern sands, point counted using the Gazzi-Dickinson method. The abbreviations used are as follows: Q – quartz; F – feldspar; L – lithic fragments

  9. Tonto Group - Wikipedia

    en.wikipedia.org/wiki/Tonto_Group

    Figure 1. A geologic cross section of the Grand Canyon. [5]The Tonto Group is a name for an assemblage of related sedimentary strata, collectively known by geologists as a Group, that comprises the basal sequence Paleozoic strata exposed in the sides of the Grand Canyon.

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    related to: turquoise sandstones meaning stone in history facts and statistics