90 ANALYSES OF ROCKS AND MINERALS, 1880-1908. 
The following rock and separations, from Square Butte, at the east end of the High- 
wood Mountains, are described by Lindgren in Am. Jour. Sci., 3d ser., vol. 45, p. 286. 
Analyses by W. I. Melville, record No. 1268. 
A. Post-Cretaceous sodalite syenite. Pulaskose. Contains orthoclase, some albite, 
hornblende, sodalite, analcite, and apatite. Orthoclase predominates. The sodalite 
amounts to 8 percent. P.R. C. 184 and 201. 
B. Hornblende separated from A. Near barkevikite. 
C. Sodalite from A. -Sp. gr., 2.265. 
D. Analcite from A. Sp. gr., 2.255. 
In addition, the orthoclase gave 3.88 per cent Na,O and 11.03 per cent K,0. A 
separation of mixed feldspars (sp. gr., 2.56) gave 6.08 per cent Na,O and 8.91 per 
cent KO. 
8 LITTLE ROCKY MOUNTAINS. 
Granite syenite porphyry. Liparose. Described by Weed and Pirsson, Jour. Geol- 
ogy, vol. 4, p. 399. Contains orthoclase, quartz, oligoclase, iron oxides, and a little 
muscovite. Analysis by H. N. Stokes, record No. 1558. P. R. C. 905. 
nc RSE ie eS toc gasee. GBREDH | PIO pio es ysisis Sead emersedac masse aeeteekecmes, WEACe 
Bisa see aa ceetsteh 18.31 (MNO 2. 02 scat ae sainea sata teiseuneainaseanintanen trace 
Passes cetadls Aan al fee nears ames OS IN STO a ey en cece sen ceomrcten eetsharsreecdonetachiaaseccarectemeerd. WOO. 
oaadtedutonss OBE TB Oras x ay sesectctets sleharect neieentisals octactinanterct 13 
el arcca tapers Ree sneer tore Siaincae Sateen PQ) Tolpis dicts toc sorte camnantieene eulectneiaee a cemertases, WEACS 
atanstassittis pisin-aieidiasarsierersisie 1:00) | SOg.2 cenwssemeenenceseinsaeun ca cseiesoam ACE 
civatdwiatiora ae bainaal oes Bs BG} (| Cleese ees drs Said crnciene Gre eoeiacigddiceiayeenir, ~elOS. 
Retitiegmeeie BATA Mees icra so Sista Sa chats aferarsin nd queers ASA fade oardedeorayey MEMOS 
Re eee eee <27 — 
potas hetpeiceeetaselee ell awleyeiealelaea - 83 99. 88 
isk asadtslara disse eects a Seen CHO -20 
9. BEARPAW MOUNTAINS. 
Described by Weed and Pirsson, Am. Jour. Sci., 4th ser., vol. 1, pp. 283 and 351, 
and vol. 2, pp. 136 and 188. Analyses by H. N. Stokes, record Nos. 1558 and 1572. 
A. Quartz syenite porphyry, Gray Butte. Nordmarkose. Contains anorthoclase, 
microlites of plagioclase, eegirite, augite, quartz, and apatite, with an occasional zircon, 
and very few biotite leaves. P. R. C. 897. 
B. Quartz syenite, Beaver Creek stock. Liparose. Contains orthoclase, albite, 
quartz, augite, and iron oxides, with very little biotite, hornblende, and sphene. 
P.R. C. 900. 
