In a manner relating to geomorphology; from the perspective or using the methods of geomorphology.
From geomorphological plus the -ly adverb-forming suffix. This creates an adverb allowing description of how something is viewed or done through a geomorphological lens.
When scientists describe something 'geomorphologically,' they're essentially reading the landscape as a historical document written by natural forces—each erosion pattern, each rock formation, each curve of a valley is a sentence telling the story of Earth's past.
Complete word intelligence in one call. Free tier — 50 lookups/day.