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  2. Blowhole (geology) - Wikipedia

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

    The formation of a blowhole system begins as a littoral cave is formed. The main factors that contribute to littoral caves formation are wave dynamics and the parent material’s rock property. A parent material property such as susceptibility or resistance to weathering plays a major role in the development of caves.

  3. Hālona Blowhole - Wikipedia

    en.wikipedia.org/wiki/Hālona_Blowhole

    On windy days when the tide is high, the ocean breeze sends the waves rolling on to the shore where the rock formation then shoots sea spray high into the air through the cave acting like a geyser. The blowhole is most active when the tide is high and the winds are strong, [3] and it can shoot sea spray up to thirty feet high in the air. [4]

  4. Formation of rocks - Wikipedia

    en.wikipedia.org/wiki/Formation_of_rocks

    This article discusses how rocks are formed. There are also articles on physical rock formations, rock layerings , and the formal naming of geologic formations. Terrestrial rocks are formed by three main mechanisms: Sedimentary rocks are formed through the gradual accumulation of sediments: for example, sand on a beach or mud on a river bed. As ...

  5. Geological formation - Wikipedia

    en.wikipedia.org/wiki/Geological_formation

    A geological formation, or simply formation, is a body of rock having a consistent set of physical characteristics that distinguishes it from adjacent bodies of rock, and which occupies a particular position in the layers of rock exposed in a geographical region (the stratigraphic column).

  6. Metamorphic facies - Wikipedia

    en.wikipedia.org/wiki/Metamorphic_facies

    Triangular diagrams showing the aluminium (A), calcium (C) and iron (F) content of the main phases (dark dots) in metamorphic rocks in various facies. Thin grey lines are stable phase equilibria. Triangular diagrams showing the aluminium (A), iron (F) and magnesium (M) content of the main phases (dark dots and, when the composition can vary ...

  7. Rock cycle - Wikipedia

    en.wikipedia.org/wiki/Rock_cycle

    This diamond is a mineral from within an igneous or metamorphic rock that formed at high temperature and pressure. The rock cycle is a basic concept in geology that describes transitions through geologic time among the three main rock types: sedimentary, metamorphic, and igneous. Each rock type is altered when it is forced out of its ...

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  9. Fractional crystallization (geology) - Wikipedia

    en.wikipedia.org/wiki/Fractional_crystallization...

    Cumulate rock – Igneous rocks formed by the accumulation of crystals from a magma either by settling or floating. Flow banding – Bands or layers that can sometimes be seen in rock that formed from magma; Fractional crystallization (chemistry) – Method for refining substances based on differences in their solubility

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