“This mosaic of five Mars pictures shows the eastern part of the Chryse region near the prime Viking 1 landing site. The Viking Orbiter cameras took the pictures from a range of about 1600 kilometers (992 miles) on June 23. Braided channels record water flowing on the planet in the past. Fine grooves and hollows on the upstream side of flow obstacles also are seen. Shore of the channel is at lower right.”
To me, this was the most iconic/memorable early Viking Orbiter image that provided evidence of past flowing water on Mars.
And/or:
"Islands near Chryse Planitia
"Islands" near Chryse Planitia. Teardrop-shaped "islands" are shown at the mouth of Ares Vallis near the southern boundary of Chryse Planitia. Flow was from the south and apparently diverged around obstacles such as craters and low hills to form a sharp prow upstream and an elongate tail downstream. A shallow moat surrounds the entire island. Similar patterns on Earth have been formed by catastrophic floods, wind erosion, and glacial action. From top to bottom, the three large craters are named Lod, Bok, and Gold. [211-4987; 21°N, 31°W]"
Per:
"NASA SP-441: VIKING ORBITER VIEWS OF MARS". At:
history.nasa.gov/SP-441/ch4.htm
Specifically:
history.nasa.gov/SP-441/p37.htm
