As words composed of rocks, petriverse refers to petric texts inscribed in a landscape-oriented-page-space for perusal by a perambulatory public.

Petriverse is a highly constrained genre.

MATERIALS: Over the years, Pierre Jardin has amassed a collection of 'signifier stones,' pebbles suitable for forming letters. The bulk of the stock of these rocks are Palos Verdes beach cobble, ranging from cylindrical to squat or squarish in shape, and from six inches to an inch in size.They are predominantly blueish gray or beigeish brown in color.

There are smaller collections, or limited editions, of other 'fonts': sharp, polished black volcanic shards from the Yuha desert; brown