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  2. Stack (geology) - Wikipedia

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

    A stack or sea stack is a geological landform consisting of a steep and often vertical column or columns of rock in the sea near a coast, formed by wave erosion. [1] Stacks are formed over time by wind and water, processes of coastal geomorphology. [2] They are formed when part of a headland is eroded by hydraulic action, which is the force of ...

  3. Deposition (geology) - Wikipedia

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

    The secondary principle to the creation of seaward sediment fining is known as the hypothesis of asymmetrical thresholds under waves; this describes the interaction between the oscillatory flow of waves and tides flowing over the wave ripple bedforms in an asymmetric pattern. [4] "The relatively strong onshore stroke of the waveforms an eddy or ...

  4. Ripple marks - Wikipedia

    en.wikipedia.org/wiki/Ripple_marks

    Ripple cross-laminae forms when deposition takes place during migration of current or wave ripples. A series of cross-laminae are produced by superimposing migrating ripples. The ripples form lateral to one another, such that the crests of vertically succeeding laminae are out of phase and appear to be advancing upslope.

  5. Glossary of landforms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_landforms

    Tombolo – Deposition landform in which an island is connected to the mainland by a sandy isthmus; Volcanic arc – Chain of volcanoes formed above a subducting plate; Wave-cut platform – Narrow flat area created by erosion

  6. 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]

  7. Spit (landform) - Wikipedia

    en.wikipedia.org/wiki/Spit_(landform)

    Wave refraction can occur at the end of a spit, carrying sediment around the end to form a hook or recurved spit. [4] Refraction in multiple directions may create a complex spit. Waves that arrive in a direction other than obliquely along the spit will halt the growth of the spit, shorten it, or eventually destroy it entirely. [4]

  8. Longshore drift - Wikipedia

    en.wikipedia.org/wiki/Longshore_drift

    It explained how beaches get to form as a result of prevailing wind and wave directions and that on one side of the beach deposition takes place, while on the other side, erosion does. While the mechanics were becoming more apparent, the interrelationship of the forces in play still proved quite problematic for those trying to manage coasts.

  9. Depositional environment - Wikipedia

    en.wikipedia.org/wiki/Depositional_environment

    A diagram of various depositional environments. In geology, depositional environment or sedimentary environment describes the combination of physical, chemical, and biological processes associated with the deposition of a particular type of sediment and, therefore, the rock types that will be formed after lithification, if the sediment is preserved in the rock record.