MEMOIR 8 Stratigraphy and Paleontology . of the Mississippian System in Southwestern New Mexico and Adjacent Southeastern Arizona By AUGUSTUS K. ARMSTRONG 1 9 6 2 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 Edwin L. Mechem ........................................................ Governor of New Mexico Tom Wiley ..................................................................................Superintendent of Public Instruction APPOINTED MEMBERS William G. Abbott ............................................................................................................... Hobbs Holm 0. Bursum, Jr. ......................................................................................................... Socorro Thomas M. Cramer ......................................................................................................... Carlsbad Frank C. DiLuzio ..................................................................................................... Albuquerque Eva M. Larrazolo (Mrs. Paul F.) ............................................................................. Albuquerque Published June 22, 1962 For Sale by the New Mexico Bureau of Mines & Mineral Resources Campus Station, Socorro, N. Mex.- Price $2.50 Contents Page ABSTRACT................................................................................................................... INTRODUCTION ......................................................................................................... Previous work .......................................................................................................................................... 3 Acknowledgments ................................................................................................................................... 3 Terminology of limestone lithologies ..................................................................................................... 3 Glossary of lithologic terms ................................................................................................................ 3 STRATIGRAPHY ........................................................................................................................................ 5 Escabrosa group ...................................................................................................................................... 5 Keating formation ............................................................................................................................... 5 Lithology ........................................................................................................................................ 5 Fauna of member A ......................................................................................................................... 8 Fauna of member B ...................................................................................................................... 10 Hachita formation ............................................................................................................................. 10 Lithology ...................................................................................................................................... I o Fauna ............................................................................................................................................ 12 PALEOGEOGRAPHY AND REGIONAL CORRELATIONS ................................................................. 14 Penasco dome ..................................................................................................................................... 14 Upper Devonian ..................................................................................................................................... 14 Kinderhook formation ............................................................................................................................ 14 Osage ...................................................................................................................................................... I 5 Emergence of crinoids to dominance in Osage time ......................................................................... 21 Meramec ................................................................................................................................................ 24 Chester ................................................................................................................................................... 24 Mississippian bioherms ......................................................................................................................... 27 SYSTEMATIC PALEONTOLOGY .......................................................................................................... 28 Protozoa ................................................................................................................................................. 28 Endothyra .......................................................................................................................................... 28 Endothyra symmetrica ..................................................................................................................... 28 Endothyra sp. indet. ......................................................................................................................... 28 Paraendothyra ...................................................................................................................................... 29 Paraendothyra sp. indet. ................................................................................................................... 3o Paramillerella ....................................................................................................................................... 3o Paramillerella tortula ....................................................................................................................... 3o Paramillerella? sp. ............................................................................................................................ 3o Coelenterata .............................................................................................................................................. 3o Amplexizaphrentis ............................................................................................................................... 3o Page Amplexizaphrentis hespere ........................................................................................................................ 3' Amplexizaphrentis northropi .................................................................................................................... 31 Amplexizaphrentis sonoraensis ................................................................................................................ 32 Amplexizaphrentis clinatus ....................................................................................................................... 32 Homalophyllites ............................................................................................................................................. 33 Homalophyllites circularis ......................................................................................................................... 33 Homalophyllites calceolus ......................................................................................................................... 33 Hapsiphyllum .................................................................................................................................................. 34 Hapsiphyllum nunnensis ........................................................................................................................... 35 Caninia ............................................................................................................................................................. 35 Caninia cornucopiae ................................................................................................................................... 35 Vesiculophyllum ............................................................................................................................................. 36 Vesiculophyllum sutherlandi ..................................................................................................................... 36 Vesiculophyllum cf. incrassatum .............................................................................................................. 36 Vesiculophyllum sp. A ............................................................................................................................... 37 Vesiculophyllum sp. B ................................................................................................................................ 37 Rylstonia .......................................................................................................................................................... 37 Rylstonia teres .............................................................................................................................................. 37 Lithostrotionella ............................................................................................................................................