A few canals might presumably be so situated that their flow could, by inequality of Terrane, lie equatorward, but not all....
"Is Mars Habitable?"
Alfred Russel Wallace
Read Dr. Walcott's monograph from the fourteenth report of the United States Geological Survey, Volume No. 2, entitled "Pre-Cambrian Igneous Rocks of the Unkar Terrane."
"The-Grand-Canyon-of-Arizona-how-to-see-it"
James, George Wharton