MEMOIR 6 Cretaceous -Tertiary Palynology, Eastern Side of the San Juan Basin, New Mexico By ROGER Y. ANDERSON 1 9 6 0 STATE BUREAU OF MINES AND MINERAL RESOURCES NEW MEXICO INSTITUTE OF MINING AND TECHNOLOGY CAMPUS STATION SOCORRO, NEW MEXICO NEW MEXICO INSTITUTE OF MINING & TECHNOLOGY E. J. Workman, President STATE BUREAU OF MINES AND MINERAL RESOURCES Alvin J. Thompson, Director THE REGENTS MEMBERS EX OFFICIO The Honorable John Burroughs ............................................................. Governor of New Mexico Tom Wiley ................................................................................. Superintendent of Public Instruction APPOINTED MEMBERS Holm 0. Bursum, Jr. .......................................................................................................... Socorro Thomas M. Cramer ......................................................................................................... Carlsbad Frank C. DiLuzio ..................................................................................................... Albuquerque John N. Mathews, Jr. ........................................................................................................ Socorro Richard A. Matuszeski ............................................................................................. Albuquerque For Sale by the New Mexico Bureau of Mines & Mineral Resources Campus Station, Socorro, N. Mex.—$3.50. Contents Page ABSTRACT ......................................................... INTRODUCTION .......................................................................................................... ACKNOWLEDGMENTS .................................................................................................... GEOLOGIC HISTORY, ENVIRONMENT, AND AGE OF STRATIGRAPHIC UNITS . .......... 3 CHARACTER OF POLLEN AND SPORE FLORULES .................................................................. 5 Kirtland shale florule ....................................................................................................................... 5 Ojo Alamo i florule ......................................................................................................................... 5 Ojo Alamo 2 florule ......................................................................................................................... 5 Nacimiento florule ........................................................................................................................... 8 Nacimiento 2 florule ........................................................................................................................ 8 Lewis shale florule and faunule ....................................................................................................... 8 CRETACEOUS-TERTIARY BOUNDARY ....................................................................................... 9 Paleobotanical evidence .................................................................................................................. 9 Vertebrate evidence ......................................................................................................................... 9 Marine invertebrate evidence ........................................................................................................ 10 METHOD OF CLASSIFICATION .......................................................................................... REVISION OF MONOSULCATE GENERA .................................................................................... 12 TECHNIQUE ..................................................................................................................................... 13 CONCLUSIONS ................................................................................................................................ 13 SYSTEMATIC DESCRIPTIONS ..................................................................................................... 14 Genus SPHAGNUM Linné ............................................................................................................ 14 Sphagnum sp. ............................................................................................................................... 14 Genus LYGODIOSPORITES R. Potonié, 1951 14 Lygodiosporites adriennis (R. Potonié and Gelletich, 1933) ........................................................... 14 Lygodiosporites? sp. ...................................................................................................................... 14 Genus GLEICHENIIDITES (Ross) Delcourt and Sprumont, 1955 .............................................. 14 Gleicheniidites senonicus Ross, 1949 .............................................................................................. 14 Genus POLYPODIIDITES Ross, 1949 .......................................................................................... 14 Polypodiidites spp. ........................................................................................................................ 14 Genus LYCOPODIUM Linné ........................................................................................................ 14 Lycopodium novomexicanum n. sp. .................................................................................................. 14 Genus CINGULATISPORITES Thompson, 1953 ........................................................................ 15 Cingulatisporites lancei n. sp. ........................................................................................................ 15 Genus CONCAVISPORITES Pflug, 1953 .................................................................................... 15 Concavisporites sp. .................................................................................................................................... 15 Genus FOVEOTRILETES (Van der Hammen) R. Potonié, 1956 ................................................ 15 Foveotriletes scrobicularis (Ross) R. Potonié, 1956 ....................................................................... 15 Genus INTERTRILETES n. gen. .................................................................................................. 15 Intertriletes scrobiculatus n. sp. ..................................................................................................... 15 Genus LAEVIGATISPORITES (Bennie and Kidston) Ibrahim, 1933 ......................................... 15 Laevigatisporites percrassus n. sp. ................................................................................................. 15 Page Genus LAEVIGATOSPORITES Ibrahim, 1953 .................................................................................. 16 Laevigatosporites sp. ............................................................................................................................... 16 Genus PUNCTATOSPORITES Ibrahim, 1933 .................................................................................... 16 Punctatosporites reginensis n. sp. .......................................................................................................... 16 Genus RUGULATISPORITES Pflug, 1953 ........................................................................................... i6 Rugulatisporites sp. ................................................................................................................................. 16 Genus PODOCARPUS L'Heritier .......................................................................................................... 16 Podocarpus northropi n. sp. ................................................................................................................... 16 Podocarpus sellowiformis Zaklinskaja, 1957 ......................................................................................... 16 Podocarpus zuniensis n. sp. .................................................................................................................... 17 Genus ABIETIPITES Wodehouse, 1933 .............................................................................................. 17 Abietipites spp. ......................................................................................................................................... 17 Genus PINUS Linné .................................................................................................................................. 17 "Pinus haploxylon type" of Rudolph, 5935 .......................................................................................... 17 "Pinus sylvestris type" of Rudolph, 1935 ............................................................................................. 17 Pinus minima (Couper, 1958) ................................................................................................................ 17 Genus EPHEDRA Linné .......................................................................................................................... 17 Ephedra notensis Cookson, 1956 .......................................................................................................... 17 Genus ARECIPITES (Wodehouse, 1933) ............................................................................................. 18 Arecipites microreticulatus n. sp. ........................................................................................................... 18 Arecipites reticulatus (Van der Hammen, 1954) ................................................................................. 18 Genus