Feb 7, 2017 · Also called linear dunes, longitudinal dunes look like large, parallel needle-esque features on the landscape. They are straight, and long, unlike the typical dune that people imagine. This dune type forms when sand is not in excess, …

Linear dunes may occur as isolated ridges, but they generally form sets of parallel ridges separated by miles of sand, gravel, or rocky interdune corridors. Some linear dunes merge to form Y-shaped compound dunes.

Jul 6, 2000 · Here we present images produced by ground penetrating radar showing the three-dimensional sedimentary structure of a linear dune in the Namib sand sea, where some of the world's largest...

Feb 28, 2024 · Linear dunes form broadly parallel to the resultant vector of sand-shifting winds, and can vary in length from several hundred metres to several hundred kilometres in length. Several models exist for linear dune formation at large scales.

Jul 12, 2023 · Linear, also known as longitudinal or seif dunes, are long, straight dunes aligned with the dominant wind direction. Linear dune formation typically occurs in desert regions where winds blow from two directions.

Linear dunes are elongated, parallel ridges of sand that form in arid or semi-arid regions as a result of wind activity. These dunes often stretch for long distances and can vary in height and width, reflecting the wind direction and intensity that shaped them.

Dec 1, 1982 · Linear dunes are the most widespread of all dune types. This paper reviews their geomorphic and sedimentary characteristics and the wind regimes in which they are found, and compares the...

Jan 1, 2014 · The term “linear dune” refers to the group of straight and sinuous longitudinal dunes. However, straight longitudinal dunes are generally referred to as “linear dunes.” Less frequently, they are referred to as “linear ridges” (not recommended) or “sand ridges” to distinguish them from sinuous seif dunes.

Aug 16, 2009 · Linear dunes have also been identified on Titan, where they are thought to form in loose sand. Here we present evidence that in the Qaidam Basin, China, linear dunes are found downwind of...

Dec 8, 2016 · An astronaut aboard the International Space Station (ISS) used a long lens to document what crews have termed one of the most spectacular features of the planet: the dunes of the Namib Sand Sea. Looking inland (from an ISS position over the South Atlantic) near sunset, the highest linear dunes show smaller linear dunes riding along their crests.