Querstreifung

Querstreifung, also known as cross-bedding or cross-stratification, is a geological term that describes the deposition of sedimentary layers at an angle to the main bedding planes. This phenomenon occurs when the direction of sediment transport changes, often due to variations in flow velocity or direction. The resulting layers are inclined and can be observed in various sedimentary environments, such as riverbeds, deltas, and marine settings.

Cross-bedding is characterized by its distinctive, inclined layers that are often visible in outcrops and can be identified by their cross-cutting relationships with the main bedding planes. The angle of inclination can vary widely, from a few degrees to nearly vertical, and the thickness of the cross-beds can range from millimeters to meters. The size and shape of the cross-beds can provide valuable information about the depositional environment and the conditions under which the sediments were deposited.

Querstreifung is an important indicator of ancient sedimentary processes and can help geologists reconstruct past environments and interpret the history of sedimentary basins. It is commonly used in the study of fluvial, deltaic, and shallow marine sediments, and its presence can provide insights into the dynamics of sediment transport and deposition in these settings.