Introduction: Yardangs are wind-eroded ridges common in regions of Mars [1] and in the most arid deserts on Earth. Yardangs have also been documented on both Venus [2] and Titan [3]. Throughout the years, studies of yardangs have concentrated on particular field sites, and therefore conclusions relating to the controlling parameters on yardang morphology have been highly divergent. Many variabl...

HiRISE images of the lower member of the Medusae Fossae Formation (MFF) were used to identify characteristics of two specific landforms that are well expressed in this particular geologic unit; yardangs and sinuous ridges. Yardangs are wind-eroded ridges that are usually confined to arid environments where the bedrock materials can be easily eroded by windblown sand. Yardangs are common in the ...

Yardangs are one of the most amazing geomorphic features of Lut desert, Iran developed in alluvial deposits of Pleistocene. They appear as the streamlined hills that are separated by U-shaped troughs with a flat-topped. The study of yardang’s morphometric parameters is important to define their morphological indices. In This study, we describe the morphology of yardangs in the Lut playa, analyz...

[1] Landforms, morphologically similar to aeolian yardangs but formed by erosion of bedrock by currents on an estuarine rock platform, are described for the first time. The geometries of the “yardangs” are described and related to semi-lemniscate shapes that minimize hydraulic drag. The processes of bedrock erosion by the reversing sedimentladen tidal currents are described, and a semi-quantita...

[1] The geologic origin of the Medusae Fossae Formation (MFF) has remained a mystery despite three decades of research. To better constrain its formation, an in-depth analysis of observations made in the literature was combined with a new survey of over 700 Mars Orbiter Camera narrow-angle images of the MFF to identify morphologic characteristics and material properties that define this formati...

Introduction. The Medusae Fossae Formation (MFF) is an enigmatic formation located between 130°-230°E and 12°S-12°N, in the southern parts of the Elysium and Amazonis quadrangles and the northern parts of the Aeolis and Memnonia quadrangles. It covers an area of approximately 2.1 x 10 km and has an estimated volume of 1.4 x 10 km [1]. The formation is composed of highly eroded, finegrained, fri...

Yardangs are streamlined ridges that form in arid environments on Earth and Mars through wind-driven abrasion of consolidated substrates. Currently, there is limited consensus the mechanisms initiate establish patterns yardangs landscape. In this work, we examine spatial organization Campo de Piedra Pómez ignimbrite deposit north-western Argentina identify evidence antecedent controls yardang f...

The morphological characteristics of yardangs are the direct evidence that reveals wind and fluvial erosion for lacustrine sediments in arid areas. These features can be critical indicators reconstructing local directions environment conditions. Thus, fast accurate extraction is key to studying their regional distribution evolution process. However, existing automated methods characterize limit...

AGGREGATE BEDFORMS AND YARDANGS AS SEEN BY THE HIRISE CAMERA N.T. Bridges, L.P. Keszthelyi, B.J. Thomson, J.J. Wray, M.E. Banks, R.A. Beyer, F.C. Chuang, K.E. Herkenhoff, K.E. Fishbaugh, A.S. McEwen, and T.I. Michaels; Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., Pasadena, CA 91109 ([email protected]); U.S. Geological Survey, Flagstaff, AZ 86001;A...