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  2. Amethyst - Wikipedia

    en.wikipedia.org/wiki/Amethyst

    The color of amethyst has been demonstrated to result from substitution by irradiation of trivalent iron (Fe 3+) for silicon in the structure, [4] [12] in the presence of trace elements of large ionic radius, [3] and to a certain extent, the amethyst color can naturally result from displacement of transition elements even if the iron ...

  3. Lake Superior agate - Wikipedia

    en.wikipedia.org/wiki/Lake_Superior_agate

    The Lake Superior agate is noted for its rich red, orange, and yellow coloring. This color scheme is caused by the oxidation of iron. Iron leached from rocks provides the pigment that gives the gemstone its beautiful array of colors. The concentration of iron and the amount of oxidation determine the color within or between an agate's bands.

  4. Water park - Wikipedia

    en.wikipedia.org/wiki/Water_park

    Typhoon Lagoon at Walt Disney World is the most visited water park in North America, and the second most visited in the world. A water park (also waterpark, water world, or aquapark) is an amusement park that features water play areas such as swimming pools, water slides, splash pads, water playgrounds, and lazy rivers, as well as areas for floating, bathing, swimming, and other barefoot ...

  5. Ore genesis - Wikipedia

    en.wikipedia.org/wiki/Ore_genesis

    Chromite and magnetite are ore minerals that form in this way. [1] Liquid immiscibility: sulfide ores containing copper, nickel, or platinum may form from this process. As a magma changes, parts of it may separate from the main body of magma. Two liquids that will not mix are called immiscible; oil and water are an example.

  6. Devil's Punchbowl (Angeles National Forest) - Wikipedia

    en.wikipedia.org/wiki/Devil's_Punchbowl_(Angeles...

    The mountain peaks above the park are 8,000 feet in elevation, compared to the park's Nature Center at 4,740 feet above sea level. The Punchbowl Canyon is 300 feet deep at the vista point. The peculiar uptilted rock formations found in the area are layers of sedimentary rocks formed long ago by water depositing loose material in horizontal layers.

  7. Water World, Colorado - Wikipedia

    en.wikipedia.org/wiki/Water_World,_Colorado

    Water World was an inspiration for the South Park episode "Pee", which features a water park named Pi Pi's Splashtown. Many of the water parks rides appeared in the episode under slightly different names, including its most notable attraction Voyage to the Center of the Earth (retitled "Journey to the Center of the Earth").

  8. Malachite - Wikipedia

    en.wikipedia.org/wiki/Malachite

    Malachite is a copper carbonate hydroxide mineral, with the formula Cu 2 CO 3 (OH) 2.This opaque, green-banded mineral crystallizes in the monoclinic crystal system, and most often forms botryoidal, fibrous, or stalagmitic masses, in fractures and deep, underground spaces, where the water table and hydrothermal fluids provide the means for chemical precipitation.

  9. Monterey Formation - Wikipedia

    en.wikipedia.org/wiki/Monterey_Formation

    Upper Miocene Migeulito member exposed at Hazard Reef, Montana de Oro State Park. This is the first onshore outcrop of the Monterey Formation south of the Monterey Peninsula. Large exposures continue south along the coast, often associated with important oilfields. Tar "volcano" in the old Carpinteria Asphalt mine. Heavy oil exudes from joint ...