The centerpiece of this show is “Fatigues,” a 2012 series of mural-size chalk-on-blackboard pieces that fill the gallery’s two largest spaces. The works depict the Hindu Kush mountain range and glaciers that feed the Kabul River, with the peaks and crags highlighted in white chalk. Aided by brief, cursive chalk inscriptions scattered across the surfaces, a narrative appears to unfold but is never quite realized. And while the renderings are convincing, the geopolitical implications and texts remove these scenes from any conventional landscape genre. Rounding out the show is the English-born artist’s meditation on drawing and perception, The Friar’s Doodle, a 16mm film from 2010. This mesmerizing projection demonstrates the rigorous conceptual core of Dean’s work.