Geology Word of the Week: Y is for Yardang

Yardangs 1. Photo courtesy of Michael Welland.

Cross-posted at Through the Sandglass. 

def. Yardang (also sometimes: jardang):
An elongated erosional landform, commonly found in deserts, resembling the hull of an inverted boat. Similar to sand dunes, yardangs typically have a tall, steep side facing the prevailing wind direction and slope gently down away from the wind. Yardangs are formed when looser material is eroded away (primarily by the wind and particle abrasion), leaving behind more consolidated material that is then sculpted into strange, ship-like shapes by further erosion. Yardangs most commonly form in soft rocks such as siltstone and sandstone (rocks commonly found in deserts) but can also form in harder rocks in places where the wind is the primary erosional force. The word yardang is of Turkish origin coming from the word "yar" which means "steep bank or precipice." According to the Oxford English Dictionary, the word yardang was first introduced to the English language in 1904 by the Swedish explorer Sven Anders Hendin.