32 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.60 



31. Cow Creek, Pierce district. Original No. P 280a. Abundant ilmenite, 



monazite, and pyrope ; occasional quartz ; rare titanite. Grain size vary- 

 ing from 0.20 to 2 mm. 



32. Pierce City. Original No. P 202. Predominant ilmenite; common mona- 



zite ; rare gold, zircon, cinnabar, rutile. Grain size, average, 1 mm., maxi- 

 miim, 3 mm. 



33. Ricli Hill Mining Co., Pierce City. Original No. P 292. Marked " cinna- 



bar." Abundant ilmenite and quartz ; rare magnetite, muscovite, zircon, 

 monazite, and cinnabar. Average grain size 2 mm. 



34. Rhodes Creek, Pierce City. Original No. P 293. Predominant ilmenite ; 



rare monazite, titanite, pyrope, zircon. Grain size, average, 0.5 mm. 



35. Pierce City. Marked " oversize." Abundant ilmenite, pyrope, and quartz ; 



occasional magnetite. Grain size, average, 5 nmi. 



ELMORE COUNTY. 



36. Big Rock placer claim, Wood Creek. Original No. P 273. Marked " zircon." 



Predominant zircon; abundant garnet (pyrope?), monazite, and ilmenite. 

 Grain size, average, 0.25 mm. 



IDAHO COUNTY. 



37. Resort. Original No. P 641. Marked, " 4.5 amperes." Predominant 



monazite; common black hornblende; rare ilmenite, biotite. Average 

 grain size, 1.20 mm. 



38. Salmon River. Original No. P 235. Marked " zircon." Predominant 



zircon ; common gold, garnet, ilmenite, augite ; rare olivine, monazite. 

 Grain size, average, 0.10 mm. 



39. Baboon placer, Elk City. Original No. P 219. Marked " monazite." 



Abundant monazite, titanite; common saraarskite (?), ilmenite; rare 

 polycrase (?), biotite, muscovite. Grain size, variable, 0.25 to 3 mm. 



40. Same locality. P 219. Marked "zircon." Predominant zircon; abundant 



monazite ; occasional ilmenite ; rare almandite, gold, cinnabar. Grain 

 size, average, 0.10 mm. 



MINIDOKA COUNTY. 



41. Riverside placers. Snake River, 8 miles east of Wapi. Original No. P 275. 



Predominant ilmenite ; rare gold, zircon, augite, almandite, pyrope, quartz, 

 olivine. Average grain size, 0.10 mm. 



42. Same locality. Original No P 275. Predominant ilmenite; occasional 



pyrope, quartz, almandite, augite, zircon. Grain size, average, 0.10 mm. 



43. Same locality. Original No. P 275. Predominant quartz ; abundant 



ilmenite ; occasional pyrope, almandite, augite, obsidian. Average grain 

 size, 0.20 mm. 



44. Same locality. Original No. P 275. Crushed oversize. Predominant 



quartz ; rare muscovite, obsidian, limonite, chlorite. Average grain size, 

 2 mm. 



45. Minidoka. Original No. 839a. Marked " Snake River gravel." Abundant 



ilmenite and augite; common olivine, pyrope, quartz; i\ire allanite (?), 

 zircon, and magnetite. Average grain size 0.25 mm., unscreened and 

 variable. 



46. Same locality. Original No. 839c. Abundant quartz; common augite; 



rare olivine, limonite, obsidian. Variable grain, sand averaging 0.25 mm., 

 but numerous small pebbles averaging 3 mm. 



