太空地质学家猜测这些陡坡可能类似于葡萄干上的皱纹，是在几十亿年前当行星表面冷却收缩时开始形成的。
Astrogeologists suspect these scarps may be analogous to the wrinkles on a raisin, having formed billions of years ago as the planet's surface cooled and shrank.
这样导致皮肤表面皱纹的形成。
穿越表面的一条线，如窄缝、裂缝或皱纹。
外观：表面应平整光滑，无皱纹和裂纹，适量避免其它缺陷，如擦伤、压痕等，允许有少量斑点。
Requirement Appearance: surface should be flat and velvet, without wrinkle and crack, avoid other disfigurement, such as scratch, impress, a few spot is available.
表面为浅棕黄色或浅棕色，有不规则纵皱纹和众多横长皮孔样突起，栓皮易剥落而露出黄白色皮部，有时可见网状纤维束。
Externally pale brownish-yellow or pale brown, with irregular, longitudinal wrinkles, cork easily exfoliated, exposing yellowish-white cortex, sometimes showing reticulated fibre bundles.
表面为浅棕黄色或浅棕色，有不规则纵皱纹和众多横长皮孔样突起，栓皮易剥落而露出黄白色皮部，有时可见网状纤维束。
Externally pale brownish-yellow or pale brown, with irregular, longitudinal wrinkles, cork easily exfoliated, exposing yellowish-white cortex, sometimes showing reticulated fibre bundles.
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