'Human face with prominent brow ridge'
David Von Canon finds, west Missouri and Arkansas border area
These are candidates for petrological examination for evidence of Stone Age human modification. If Archaeology operated as a science, it would direct fair evaluation of finds such as these rather than summarily dismissing them. If people were modifying stones to create human face likenesses, the next questions are "who?" and "when?" and "why?"
The anecdotal density of the number of people in the Arkansas/Missouri area who report suspected portable rock art finds more likely reflects a regional pattern of a set of pre-historic culturally mediated art behaviors than a modern day regional propensity toward pareidolia.