Channels on Titan or just Windstreaks?

Caption NASA originale:"Running across the image (about 300 Km across) are a series of roughly parallel, mostly east-west dark linear features that join and separate, which are not seen in the previous radar images. They may be formed by the action of eastward-flowing winds, or geologic processes acting on the crust itself. In places they cut through adjacent terrain, while elsewhere the lineaments seem to be interrupted by brighter material, appearing again on the other side. Seams between radar segments are visible as horizontal, sawtooth-shaped lines. Bright material in radar images may be rough or sloped toward the radar (which is observing from the top in this frame). Also, some of what is seen may in fact be below the surface, revealed as the radio waves penetrate overlying, radar-transparent material".