Via several hundred iPhone snapshots, St. Louis-based photographer Jamie Kreher presents a chronicle of a full, lived year. Kreher has arranged the small, square prints in clusters on several tables, where they practically cry out for the viewer to pick them up, leaf through and sort them. Lest that tacit temptation prove insufficient, folding chairs bookend the tables, the better to browse and create one's own sequence of events — or, to borrow from the exhibit's title, equivalencies. There's a flow at work here, too; as one moves from table to table, the dominant hues shift, reflecting the saturated vibrancy of summer, the desiccated tones of winter, etc. Look in on a wedding; chart a road trip along Route 66; pursue an infatuation with auditorium seating, then drop it and move on to another brief, serial fascination; here and there the artist's husband pops up. Eventually you become aware that a strange slippage overtook you, wherein the imagery moved from observed artwork to personal artifact: No longer do the photos reflect Kreher's experiences, but shades of your own. Ah, but isn't that a consequence of our innate affinity for "equivalents"? We take snapshots in order to remember, but also to share, and given time to sink in, those twinned impulses transcend the specifics depicted. (As if to subliminally reinforce that process, Kreher projects a slideshow of selected images onto a gallery wall in an endless loop.) Kreher's is a gaze trained on the ambiguously sharable, the spectacularly mundane — in short, anything but the traditionally photogenic. Accretively ample, cannily presented, this exhibit is a small revelation that taps the vast ocean of our collective unconscious, in which discrete memories blur into the look and feel of memory itself and highlight our peculiar method of storing it, which can perhaps best be characterized as...loosely. Through April 7 at Good Citizen Gallery, 2247 Gravois Avenue; 314-348-4587 or www.goodcitizenstl.com. Hours: noon-5 p.m. Fri.-Sat. and by appointment.