hk ILLINOIS STATE GEOLOGICAL SURVEY CIRCULAR 500 



Kidston, Robert, 1923, Fossil plants of the Carboniferous rocks of Great Britain: 



Memoirs of the Geological Survey of Great Britain, Palaeontology, v. 2, pt. 

 1-1+ , p. 1-375, 91 pis. 



Leary, R. L. , 1973, Lacoea, a Lower Pennsylvanian Noeggerathialian cone from Illi- 

 nois: Review of Palaeobotany and Palynology, v. 15, p. 1+3-50, 7 figs. 



Leary, R. L. , 197^-a, Stratigraphy and floral characteristics of the basal Pennsylvanian 

 strata in west central Illinois: Compte Rendu Septieme Congres International 

 de Stratigraphie et de Ge"ologie du Carbonifere, Krefeld 1971, v. 3, p. 3l+l- 

 350, 8 figs. 



Leary, R. L. , 197^+b, Reconstruction of the coal age uplands: The Explorer, v. 16, 

 no. k, p. 27-29, k figs. 



Leckwijck, W. van, Francois Stockmans , and Yvonne Willi^re, 1955, Sur l'age, la flore 

 et la fauna des formations Namuriennes affaisse*es dans les poches de dissol- 

 ution du Vise'en^de la region de Samson (Meuse Namuroise): Bruxelles, Asso- 

 ciation pour L' Etude de la Pale"ontologie et de la Stratigraphie Houill^ras, 

 no. 21, p. 267-275, h pis. 



Leggewie, Wilhelm, 1966, Uber Palaeopteridium sessilis (Potonie* 1896): Fortschritte 

 in der Geologic von Rheinland und Westfalen, v. 13, no. 1, p. 297-302, h pis. 



Leggewie, Wilhelm, and W. Schonefeld, 196l, Die Calamariaceen der Westfal-Schichten 

 im Ruhrkarbon: Palaeontographica B, v. 109, p« 1-1+1+, 3 figs., 29 pis. 



Lesquereux, Leo, 1879-1881+, Description of the coal flora of the Carboniferous forma- 

 tion in Pennsylvania and throughout the United States : Second Geological Sur- 

 vey of Pennsylvania, Report of Progress P: Atlas 1879; v. 1, p. 1-35*+, 1880; 

 v. 2, p. 355-69*+, 1880; vol. 3, p. 695-975, 1881+. 



McGinnis, L. D. , and P. C. Heigold, 197*+, A seismic refraction survey of the Meredosia 

 Channel area of northwestern Illinois: Illinois State Geological Survey Cir- 

 cular 1+88, 19 p. 



Mamay, S. H., and C. B. Read, 1956, Addition to the flora of the Spotted Ridge Forma- 

 tion in Central Oregon: U.S. Geological Survey Professional Paper 27I+-I, 

 p. 211-226, 1+ pis. 



Nemejc, Frantisek, 1928, A revision of the Carboniferous and Permian flora of the 

 coal districts in central Bohemia. I. Noeggerathiae and Archaeopterides : 

 Palaeontographica Bohemiae, v. 7, p. 1+7-82, 2 figs., 10 pis. (Praha, Ceska 

 Akademie ved a umeni ) . 



Nemejc, Frantisek, 191+1, Weitere Fruktifikationen vom Typus Discinites nebst einigen 

 Bemerkungen uber die Archaeopteriden der mittelbShmischen Kohlenbecken: 

 Mitteilungen der Tschechischen Akademie der Wissenschaften 19 1+1, 15 p. , 2 

 pis. (Auszug aus dem tschechischen in der Zeitschrift "Rozpravy II. tridy 

 Ceske* akademie" v. 51, no. 19.) 



Newberry, J. S., 1873, Description of fossil plants from the Coal Measures of Ohio: 

 Report of the Geological Survey of Ohio, v. 1, pt. 2, p. 359-385, pi. 1+1-1+8. 



No£, A. C, 1925, Pennsylvanian flora of northern Illinois: Illinois State Geological 

 Survey Bulletin 52, 18 p., 1+5 pis. 



Peppers, R. A., and H. W. Pfefferkorn, 1970, A comparison of the floras of the Col- 

 chester (No. 2) Coal and Francis Creek Shale, in Smith, W. H., et al., 1970, 

 Depositional environments in parts of the Carbondale Formation — western and 

 northern Illinois: Francis Creek Shale and associated strata and Mazon 

 Creek biota: Illinois State Geological Survey Guidebook Series 8, p. 61-7*+, 

 :■ t'i ry, . , ', t,.-i.h I 1 ■:; . 



Pfefferkorn, II. W. , ilakam Mustafa, and Hagen Hass, 1975, Quantitative Charakterisierung 

 ober-karboner Abdruckfloren: Neues Jahrbuch fur Geologie und Palaontologie, 

 Abhandlungen, v. 150, no. 3, p. 253-269, 1 fig., 8 tables. 



