Rhythmite

A rhythmite consists of layers of sediment or sedimentary rock which are laid down with an obvious periodicity and regularity.

Of the many rhythmites found in the geological record, varves are among the most important and illuminating to studies of past climate change.

Geologic tidal rhythmites display layered Carboniferous Period beds which record tidal cyclical events such as semi-diurnal, diurnal or neap tide, spring tide cycle that demonstrate marine influence in sediments that were previously interpreted as purely continental.

[4] The Storm Mountain area of Big Cottonwood Canyon, Utah, has rhythmites which record sea-level sedimentary deposit fluctuations consistent with the cycle of the tides.

The regression and transgression of the sea level from waxing and waning glaciers have been identified in the rhythmites of the Pennsylvanian and Permian periods.

A brown rock or sediment face with horizontal layers, 18 of which are clearly visible. Some of the layers are obviously thicker than others - presumably the result of differences in annual deposition rates due to seasonal variations.
Pleistocene age varves at Scarborough Bluffs , Toronto , Ontario, Canada. The thickest varves are close to 2 cm thick.
This photo shows a canyon cut into the surrounding flat soil with 32 distinct horizontal layers of soil, each clearly demarked from the layer below. Above the canyon a farm house can be seen in the distance - the farm house provide the perspective that helps the viewer establish that the cut is over 40 deep. The bottom of the cut is filled with tumble weeds.
Distinct layers of Touchet beds in the "Little Grand Canyon" near Lowden, Washington in the Walla Walla valley