ON A SPHERULITIC AND PERLITIC OBSIDIAN FROM PILAS JALISCO MEXICO - RUTLEY, FRANK (My University, 1891)
THE QUARTERLY JOURNAL OF THE GEOLOGICAL SOCIETY OF LONDON
Keywords: SPHERULITIC, PERLITIC, OBSIDIAN, PILAS, JALISCO, MEXICO; CIENCIAS DE LA TIERRA Y DEL ESPACIO; GEOLOGIA; LITOLOGIA