Var. a. Quartzose gneissyte. b. Felsitic. c. Micaceous. d. Hornblendic. e. Syenyte gneissyte. h. Porphyritic. N. Schistoid felstone. Group F.-WHINSTONE. Var. a. White rock. B. Melaphyre. Var. a. Eukryte. B Var. a. Felspathic steatyte. c. Amphibolic. Subgroup C. Eklogyte. D. Epidosyte. E. Kaolin. F. Fuller's earth. G. Meerschaum. H. Magnesyte. Group H.-TUFF (Ingenite in part, derivate in part). Subgroup A. Felstone tuff. b. Calcareous. c. Pyritous. B. Whinstone, or Basic tuff. b. Pyroxenic. c. Chloritic. d. Calcareous. e. Pyritous. f. Cupriferous. g. Hematitic. C. Calcareous tuff. D. Arenaceous. E. Argillous. I. Steatitic. J. Porphyritic. K. Nodular. Var. a. Concretionary tuff. b. Spheroidal. L. Shaly tuff. Var. a. Flaggy. b. Slaty. M. Conglomeritic tuff. Var. a. Brecciated tuff. b. Plutonic agglomerate. Group J.-AUGITIC GROUP. Subgroup A. Augyte, or Doleryte. Var. a. Nephelite augyte. b. Hauynophyre. c. Allogovyte. d. Common augyte. e. Anamesyte. f. Basalt. g. Porphyritic basalt. j. Variolitic basalt. B. Leucityte. Var. a. Compact leucityte. c. Amygdaloidal leucityte. Group K.-VOLCANIC TUFA AND PEPERINO (Ingenite in part, derivate in part). Subgroup 4. Felspathic and felsitic gneiss. Var. a. Orthoclase gneiss. b. Oligoclase gneiss. e. Alpinyte. d. Adularia gneiss. B. Micaceous gneiss. Var. a. Two-mica gneiss. C. Quartzitic gneiss. D. Basic gneiss. Var. a. Hornblendic gneiss. E. Iolitic gneiss. H. Common gneiss. Var. a. Compact gneiss. |