a word for footprints in rocks it has 11 letters i believe like this.
i- - - - p - - o - m
the study of them is called ichnology
try
http://www.wordinfo.info/words/index/info/view_unit/1033/1/?spage=&letter=
i- - - - p - - o - m
try
http://www.wordinfo.info/words/index/info/view_unit/1033/1/?spage=&letter=