OB associations are remnants of star formation on a large scale, producing everything from O- and B-type stars, down to the lowest mass brown dwarfs. OB associations represent the typical mode of star formation in the Galaxy. But is this process monolithic? We present the results of a survey for new, solar mass (0.7 - 1.3 Msun) members of Sco-Cen, the nearest OB Association to the Sun. We identify ~150 new members and place the known B/A/F/G/K/M-type members on the Hertzsprung-Russell diagram. From these data, we construct an age map of Sco-Cen, occupying approximately 2,000 square degrees on the sky. These results indicate there is substantial substructure in Sco-Cen, and present the possibility that star formation on the largest scales can be considered a collection of many individual, small-scale star formation events along a giant molecular cloud.