  We examine the distribution of young stars associated with the spiral arms of
a simulated L* cosmological disk galaxy. We find age patterns orthogonal to the
arms which are not inconsistent with the predictions of classical density wave
theory, a view further supported by recent observations of face-on Grand Design
spirals such as M51. The distribution of metals within a simulated ~0.1L* disk
is presented, reinforcing the link between star formation, the age-metallicity
relation, and the metallicity distribution function.
