An outcrop of the Eocene Rockdale formation (Wilcox group) at the Elgin Standard Brick Mfg. Co., in Bastrop County, Texas, contains many angio- sperm leaf and fruit impressions. Twenty-seven species were identified from the site, and an analysis of their relative abundance shows the families Celastraceae, Lauraceae, Magnoliaceae, and Moraceae to be dominant. Generic determinations and leaf margin analyses suggest a paratropical depositional environment for the florule. INTRODUCTION. A new and easily accessible fossil leaf locality, the Elgin Standard site, has been discovered in the Rockdale formation in Bastrop County, Texas. It contains some of the taxa described by Ball (1931), that were known only from the type material, and in- cludes more common forms described by several authors from other Eocene deposits. In contrast to earlier studies, however, several to many specimens of all species have been analyzed (Table 1), which has allowed a better understanding of morphological variation, rela- tive abundance of taxa, and paleoclimate. PREVIOUS STUDIES. Angiosperm leaf impressions were first re- ported for the Rockdale formation of the Wilcox group by Berry (1916), who listed ten species from a site near Earle in Bexar County, Texas. Having investigated two localities in Bastrop County, Texas, Ball (1931) expanded the total species for the Rockdale from ten to 60. Nearly one-third of Ball's forms were new species; the remainder were identified with taxa from the eastern Wilcox and from northern Eocene deposits such as the Raton. The only additional report of leaf impressions from the Rockdale formation is a listing of 35 species from a site in Lytle, Texas, close to the original Earle locality (Kirn and Parks, 1936). Their most important contribution was the report- ing of leaves of Ampelocissites and a new species of Anacardium.