Wind waves on Earth range in size from small ripples, to waves over high. Wind caused ripples and eddies form waves that gradually gain speed and distance (fetch). Because of the water beneath, the muskeg surface sometimes ripples underfoot. Wind-deposited sand bodies occur as sand sheets, ripples, and dunes. This process results in the formation of ripples and sand dunes. In wavy bedding the ripples are laterally discontinuous. Conchoidal fracture breakage that resembles the concentric ripples of a mussel shell. Water is simulated using glass or plexiglass with ripples carved on the surface. This effect is the cause of the circular ripples around the impurity. Fast ripples are a pathologic pattern that emerges from the physiologic ripples. Environments where the current is in one direction, such as rivers, produce asymmetric ripples. Tabular cross-bedding is formed mainly by migration of large-scale, straight-crested ripples and dunes. These were big, reckless, high-spirited guys that were unaware of the ripples they caused. This is also a distinguishing feature between water laid ripples and aeolian ripples. Males predominantly produce these ripples in the water.