The Uruk Sulcus quadrangle lies along the south margin of Galileo Regio, a large area of ancient cratered terrain, part of which appears in the northeast corner of the map area. Galileo Regio is separated from Marius Regio, another region of ancient terrain to the southwest, by a swath of grooved terrain known as Uruk Sulcus. Marius Regio is in turn broken by bands of grooved terrain, including Tiamat Sulcus, which cut across the southwestern part of the map area. Each of these major terrains is probably of roughly uniform lithology, but they may be divided into smaller units of stratigraphic or tectonic significance or both.
Line geometry is topologically clean.
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