Beardstown, Glasford, Havana, and Vermont Quadrangles, Bulletin 82, $1.00. Buda Quadrangle, Circular 275, no charge. Carlinville Quadrangle, Bulletin 77, $1.00 Chicago Region, Bulletin 65, Part 1, 50 cents. Marseilles, Ottawa, and Streator Quadrangles, Bulletin 66, $1.00. “Mineral Production in Illinois in 1959,” Circular 300 (no charge), is one of a series of annual economic summaries. “Caves of Illinois,” Report of Investigations 215, price 50 cents, will be available by September 1961. Illinois State Geological Survey Educational Series 7 24 pages, 1 plate, 12 figures, 1961 [Illustration: Illinois State Geological Survey, Urbana Educational Series 7—Plate 1—North] [Illustration: Illinois State Geological Survey, Urbana Educational Series 7—Plate 1—Central] [Illustration: Illinois State Geological Survey, Urbana Educational Series 7—Plate 1—South] GEOLOGIC MAP OF ILLINOIS showing BEDROCK BELOW THE GLACIAL DRIFT 1961 KEY T Tertiary (Pliocene omitted) K Cretaceous P² Pennsylvanian (Above No. 6 Coal) P¹ Pennsylvanian (Below No. 6 Coal) P³ Pennsylvanian (Above No. 6 Coal) M² Mississippian (Upper) M¹ Mississippian (Middle and Lower) D Devonian SD Silurian and Devonian S Silurian O Ordovician C Cambrian F Fault OSDM Complex faulted area Physiographic base map by James A. Bier Price, 25 cents [Illustration: PENNSYLVANIAN COAL-BEARING ROCKS] Transcriber’s Notes —Silently corrected a few typos. —Retained publication information from the printed edition: this eBook is public-domain in the country of publication. —In the text versions only, text in italics is delimited by _underscores_.