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  2. List of rock formations - Wikipedia

    en.wikipedia.org/wiki/List_of_rock_formations

    A rock formation is an isolated, scenic, or spectacular surface rock outcrop. Rock formations are usually the result of weathering and erosion sculpting the existing rock. The term rock formation can also refer to specific sedimentary strata or other rock unit in stratigraphic and petrologic studies.

  3. Hierve el Agua - Wikipedia

    en.wikipedia.org/wiki/Hierve_el_Agua

    Hierve el Agua (Spanish for "the water boils") is a set of natural travertine rock formations in San Lorenzo Albarradas, Oaxaca, Mexico that resemble cascades of water. [1] [2] The site is located about 70 km east of Oaxaca City, [3] and consists of two rock shelves or cliffs which rise between fifty and ninety metres from the valley below, from which extend nearly white rock formations which ...

  4. Groundwater - Wikipedia

    en.wikipedia.org/wiki/Groundwater

    Groundwater is the water present beneath Earth's surface in rock and soil pore spaces and in the fractures of rock formations. About 30 percent of all readily available fresh water in the world is groundwater. [1] A unit of rock or an unconsolidated deposit is called an aquifer when it can yield a usable quantity

  5. Aquifer - Wikipedia

    en.wikipedia.org/wiki/Aquifer

    An aquifer is an underground layer of water-bearing material, consisting of permeable or fractured rock, or of unconsolidated materials (gravel, sand, or silt). Aquifers vary greatly in their characteristics. The study of water flow in aquifers and the characterization of aquifers is called hydrogeology.

  6. Natural arch - Wikipedia

    en.wikipedia.org/wiki/Natural_arch

    The formations become narrower due to erosion over geologic time scales. The softer rock stratum erodes away creating rock shelters, or alcoves, on opposite sides of the formation beneath the relatively harder stratum, or caprock, above it. The alcoves erode further into the formation eventually meeting underneath the harder caprock layer, thus ...

  7. 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 ...

  8. Stack (geology) - Wikipedia

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

    (Cliffs with weaker rock, such as claystone or highly jointed rock, tend to slump and erode too quickly to form stacks, while harder rocks such as granite erode in different ways.) [4] The formation process usually begins when the sea attacks lines of weakness, such as steep joints or small fault zones in a cliff face. These cracks then ...

  9. Arch of Cabo San Lucas - Wikipedia

    en.wikipedia.org/wiki/Arch_of_Cabo_San_Lucas

    The arch of Cabo San Lucas is a distinctive granitic rock formation at the southern tip of Cabo San Lucas, which is itself the extreme southern end of Mexico's Baja California Peninsula. [1] The arch is locally known as "El Arco," which means "the arch" in Spanish, or "Land's End." [2] It is here that the Pacific Ocean becomes the Gulf of ...