Gigas Sulci
A sulcus (or sulci, plural) is defined as “subparallel furrows and ridges.” This is a purely descriptive term for landforms that could have a variety of origins.
At this location appears to be a graben (which is a fault-bounded valley) on a large scale, and locally (such as in this image) became a vent region for lava flows.
ID: ESP_040661_1890
date: 30 March 2015
altitude: 272 km
https://uahirise.org/hipod/ESP_040661_1890
NASA/JPL-Caltech/University of Arizona
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