Yardang!

[h1]YARDANG[h1]

It is a wind-abraded ridge found in cohesive material. The word is derived from turkish meaning, 'steep bank'. Some are found in dried-up river beds. These are elongate features typically 3 or more times longer than they are wide, when viewed from above , resemble the hull of a boat.

TYPES:
a) Mega-yardang : can be several kilometers long & hundreds of meters high.

b) Meso-yardang : these are generally a few meters high & 10-15 meters long.

c) Micro-yardang : these are only few centimeters high.

Yardang form in environment where water is scarce. The prevailing winds are strong, unidirectional & carry an abrasive sediment load. A large concentration of mega are found near the tibesti mountains in the central sahara. There is a famous yardang are 'hole in the rock' in papayo parla in phoenix, arzona , a rock formation with a roughly another yardang arizona is window rock, near the town of window rock. It is a 200 feet sandstorm hill with a very large circular rock in the middle of it.