Microtopography

Very small scale (roughly, 'organism-sized') variations in the height and roughness of the ground surface.
Found on http://www.blackwellpublishing.com/Townsend/Glossary/GlossaryM.html

microtopography

microtopography, microtopographic, microtopographical The surface features of a material, or of the earth or other body, on a small or microscopic scale.
Found on http://www.wordinfo.info/words/index/info/view_unit/2724/42

Microtopography

topography on a smaller scale
Found on http://imnh.isu.edu/digitalatlas/bio/glsry.htm
No exact match found