Geology of the Espinaso Formation (Oligocene), North-Central New Mexico Kautz, P. F. ; Ingersoll, R. V. ; Baldridge, W. S. ; Damon, P. E. ; Shafiqullah, M. Abstract Publication: Geological Society of America Bulletin Pub Date: December 1981 DOI: 10.1130/GSAB-P2-92-2318 Bibcode: 1981GSAB...92.2318K