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Sailing stones (also called sliding rocks, walking rocks, rolling stones, and moving rocks) are part of the geological phenomenon in which rocks move and inscribe long tracks along a smooth valley floor without animal intervention. The movement of the rocks occurs when large, thin sheets of ice floating on an ephemeral winter pond move and ...
Evaporite – Water-soluble mineral deposit formed by evaporation from an aqueous solution; Flint – Cryptocrystalline form of the mineral quartz; Geyserite – Form of opaline silica often found around hot springs and geysers; Greywacke – Sandstone with angular grains in a clay-fine matrix; Gritstone – Hard, coarse-grained, siliceous ...
Commonly, these crests can be truncated by subsequent flows. Their wavelength (periodicity) depends on the sediment grain size, water depth and water-particle orbits in the waves. On tidal flats the pattern of wave-formed ripples may be complicated, as a product of changing depth and wind and tidal runoff directions. [1]
The term rock formation can also refer to specific sedimentary strata or other rock unit in stratigraphic and petrologic studies. A rock structure can be created in any rock type or combination: Igneous rocks are created when molten rock cools and solidifies, with or without crystallisation. They may be either plutonic bodies or volcanic ...
Water on Mars - sedimentary ripple marks show indirect evidence of ancient water flows on our neighbor planet; Transverse aeolian ridges - mysterious fossilized features on Mars that resemble giant ripples; Washboarding - ripples on dirt roads formed by the interaction of vehicle wheels with the gravel and sediment
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 the sea or water crashing against the rock. The force of the water weakens cracks in the headland, causing them to later collapse, forming free-standing stacks and ...
The reef is divided into four rocks above water which, however, are joined below; it is separated from the continent by a narrow channel filled with many stones, by which as by a staircase one can cross the channel with dry feet when the sea is calm; but when the sea is rough, waves surround the four rocks into which I said the reef is divided.
Near Lugar in the Parish of Auchinleck in Ayrshire, Scotland, is the Lamargle or Lamargee rocking stone in a hollow by the Bello or Bellow Water near its junction with the Glenmore Water from which point the name Lugar Water is applied. It is made of two vertical stones, and a horizontal stone about 6 ft long, 3 ft broad, and 4 ft high.