WEEKS.] 
PETROLOGY, AND MINERALOGY FOR 1892-1900. 
311 
Petrology— Continued. 
List of rocks described— Continued. 
Mesolite, Winchell and Grant, 6376. 
Meta-andesite, Ransome, 4543. 
Meta-diabase, Ransome, 4543. 
Meta-diorite, Ransome, 4543. 
Metabasalt, Turner, 5472. 
Metabasalts, Clements and Smyth, 1017. 
Metadiorite, Cross, 1184. 
Metadiorite, Turner, 5467. 
Metadolerite, Clements and Smyth, 1017. 
Metagabbro, Diller, 1508. 
Metarhyolite, Diller, 1507. 
Metarhyolite, Weidman, 5970. 
Miea-andesite, Ferrier, 1813. 
Mica-dacite, Cross, 1191. 
Miea-dioritr gneiss, Ferrier, 1811. 
Miea-peridotite, Diller, 1494. 
Mica-porphyrite, Ferrier, 1813. 
Mica-schist, Clements, 1014. 
Mica-schist, Diller, 1507. 
Mica-schist, Kemp, 2993. 
Mica-SChist, Walker, 5825. 
Mica-schist, Watson, 5888. 
Mica-schist, Winchell and Grant, 6376. 
Mica-syenite, Merrill, G. P., 3951. 
Mica-syenite, Ransome, 4541. 
Mica-trachyte, Ferrier, 1813. 
Micropegmatite rock, Coleman, 1027. 
Micropegmatite rock, Williams, 6154. 
Microperthiic, Weidman, 5970. 
Minette, Diller, 1507. 
Minette, Pirsson, 4384, 4408. 
Minette, Weed and Pirsson, 5928, 5935. 
Missourite, Weed and Pirsson, 5938. 
Molybdenite, Turner, •">i7:'.. 
Monchiquite, Kemp and Marsters, 2978. 
Monchiquite, Marsters. 3727. 
Monchiquite, Pirsson, (394. 
Monchiquite, Weed and Pirsson, 5935. 
Monzonite, Cross, 1201. 
Monzonite, Cushing, 1244. 
Monzonite, Pirsson, 4408. 
Monzonite, Tower and Smith, 5445. 
Monzonite, Weed, 5945, 5946. 
Mnscovadytc, Winchell and Grant, 6376. 
Muscovite-granite, Crosby, 1169. 
Monzonite porphyry. Hills, 2599. 
Nepheline-basalt, Weed and Pirsson, 5936. 
Nepheline-basanite, Osann, ht:>. 
Nepheline-bearing rock, Bascom, 277. 
Nepheline-melilite basalt. Merrill, 3967a. 
Nepheline-pyroxene-malignite, Lawson, 3419. 
Nepheline-syenite, Adams, 10-12. 
Nepheline-syenite, Coleman, 1043, 1045. 
Nepheline-syenite, Cross, 1190. 
Nepheline-syenite, Diller, 1507. 
Nepheline-syenite, Kemp, 2993. 
Nepheline-syenite, Ransome, 4541. 
Nepheline-syenite, Sears, 4904. 
Nepheline-syenite, Washington, 5873. 
Nevadite, Diller, 1507. 
Nordmarkite, Washington, 5873. 
Norite, Clements and Smyth, 1017. 
Norite, Ferrier, 1811. 
Norite, Turner, 5453. 
Norite (?), Winchell and Grant, 6376. 
Petrology — Continued. 
List of rocks described — Continued. 
Novaculite, Branner, 546. 
Novaculite, Derby, 1487. 
Novaculite, Griswold, 2195, 2198. 
Novaculite, Prosser, 4477. 
Novaculite, Rutley, 4724. 
Obsidian, Ordonez, 4141, 4144. 
Olivine-basalt, Ferrier, 1813. 
Qli vine-bearing pyroxene-andesite, Diller, 
1507. 
Oli vine-diabase, Clements, 1014. 
Olivine-diabase, Culver and Hobbs, 1212. 
Olivine-diabase, Diller, 1507. 
Olivine-diabase, Dresser. 1541. 
Olivine-diabase, Keyes, 3050. 
olivine diabase, Lawson. :!416. 
Olivine-diabase, Osann, 1 1 T c» . 
Olivine diabase, Van Hise and Bayley, ■'•Tin. 
Olivine diabase, Walker. 5825. 
Olivine-norite, Lord, 8571. 
Oolite, Diller, 1507. 
Ophicalcite, Kemp. 2986, 2993. 
Orendite, Diller, 1507. 
Orenditem, cross, 1196. 
Ottrelite schist, Whittle, 6119. 
Paisanite, Washington, 5875. 
Peat. Diller, 1507. 
Pegmatite, Crosby and Fuller, 1164. 
Pegmatite, Spurr, 5173. 
Pegmatite, \\ estgate, 6017. 
Pegmatite, Williams, <;. n., 6166. 
Pegmatite, Win-low , 6394. 
Perido steatite, Bascom, 278. 
Peridotite, elements. L015. 
Peridotite, Clements and Smyth, 1017. 
Peridotite, Cross, 1191. 
Peridotite, Diller, 1507. 
Peridotite, Fairbanks, L753. 
Peridotite, Hall, 22,51. 
Peridotite. Kemp, 2993. 
Peridotite. Lew is, 3508. 
Peridotite, Pratt, 1440. 
Peridotite, Smyth, 5072. 
Peridotite, Turner, 5153, 5457. 5465. 
Peridotite. Van Hise and Bayley, 56%, 5704. 
Peridotite var. wehrlite, Merrill, G. P., 3951. 
Peridotite. Winchell and Grant, 6376. 
Phonolite, Cross, 1187, 1190, 1192. 
Phonolite, Diller, 1507. 
Phonolite, Goldsmith, 2044. 
Phonolite, Irving, 2868. 
Phonolite, Kemp, 2993. 
Phonolite, Pirsson, 1386. 
Phonolite, Todd, 5407. 
Phonolite, Weed and Pirsson, 5939. 
Phyllite. Diller, 1507. 
Phyllite, Pirsson, 4384. 
Phyllite, Walker, 5825. 
Picrite-porphyrite, Ferrier, 1813. 
Picrite-porphyry, Clements and Smyth, 1017. 
Plagioclasyte, Winchell, 6277. 
Porphyrel, Winchell and Grant, 6376. 
Porphyrite, Cross, 1188. 
Porphyrite, Ferrier, 1813. 
Porphyrite, Iddings, 2823. 
Porphyrite, Lindgren, 3531. 
