Hydraulic action

Hydraulic action

Hydraulic action is a form of mechanical weathering caused by the force of moving water currents rushing into a crack in the rockface. The water compresses the air in the crack, pushing it right to the back. As the wave retreats, the highly pressurised air is suddenly released with explosive force, capable of chipping away the rockface over time. Thus, the crack is gradually widened so the amount of compressed air increases like a balloon, and hence the explosive force of its release increases. Thus, the problem intensifies (a 'positive feedback' system).


Wikimedia Foundation. 2010.

Игры ⚽ Поможем сделать НИР

Look at other dictionaries:

  • hydraulic action —   lit. due to the action of water. In geography, a process of erosion whereby flowing water moves unconsolidated material due to forces of drag …   Geography glossary

  • hydraulic wedge — A hydraulic jack with ends designed to reach behind dented double panels and to press them back into shape by the hydraulic action of the wedge shaped ends …   Dictionary of automotive terms

  • Hydraulic jack — Jack Jack (j[a^]k), n. [F. Jacques James, L. Jacobus, Gr. ?, Heb. Ya aq[=o]b Jacob; prop., seizing by the heel; hence, a supplanter. Cf. {Jacobite}, {Jockey}.] [1913 Webster] 1. A familiar nickname of, or substitute for, John. [1913 Webster] You… …   The Collaborative International Dictionary of English

  • hydraulic mining — noun : mining by the action of powerful jets of water compare placer mining * * * placer mining using a pressurized stream of water. Also called hydraulicking /huy draw li king, drol i king/. [1855 60, Amer.] * * * hydraulic mining noun… …   Useful english dictionary

  • Hydraulic governor — Governor Gov ern*or, n. [OE. governor, governour, OF. governeor, F. gouverneur, fr. L. gubernator steersman, ruler, governor. See {Govern}.] 1. One who governs; especially, one who is invested with the supreme executive authority in a State; a… …   The Collaborative International Dictionary of English

  • hydraulic —   a. pertaining to moving fluids; pertaining to mechanical action of water; conveyed or worked by water.    ♦ hydraulics, n. study of fluids in motion …   Dictionary of difficult words

  • hydraulic packing — noun : packing made of a material that is highly resistant to the action of water especially under high pressure …   Useful english dictionary

  • Tracker action — is a term used in reference to pipe organs to indicate a mechanical linkage between keys or pedals pressed by the organist and the valve that allows air to flow into pipe(s) of the corresponding note. This is in contrast to electrical or electro… …   Wikipedia

  • Space Force (Action Force) — Logo of Space Force In story information Type of organization Special space based military unit Space Force is a fictional space military unit that features in the …   Wikipedia

  • split hydraulic brake system — Service brake system with two separate hydraulic circuits to provide braking action in one circuit if other one fails …   Dictionary of automotive terms

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”