https://github.com/davepinch/pinchy.cc/blob/master/content/topics/geology/landforms/fluvial-landform/fluvial-landform.md
Earth in the early Hadean had a very thick carbon dioxide- and methane-rich prebiotic atmosphere, but eventually oceans made of liquid water were formed.
Fluvial landform (Wikipedia) Landforms related to rivers and other watercourses include channel (geography), confluence, cut bank, …