CATALOGUE OF GEOLOGICAL COLLECTIONS. 143 
CATALOGUE— Continued. 
No. Name. Locality. 
468: Avyeidaloinl tranj-secriaceoun i... os sucicwn aneeus oeue bechGencadéu.ueuw dunnen Black mountains, Camp 49.... .... ee 
459 do do do Camp Stecdes cuss 
460 | Chalcedony, (lemon yellow) do do 
461 | Trap containing veins of jasper do Camp 61..... pes 
462 | Amygdaloid trap...... do Oant O45. iene i 
463 | Trachytic porphyry, (red purple) do do 
464 | Quartzite (pink) veins in granite ...... do Cees 68 dea 
465 | Porphyritic trachyte, partially columnar, overlying 481 and 483 do CMS 68.50 iccesce 
466 | Serpentinoid porphyry do Camp 87...as< sees 4 
467 | Stratified prophyry do do : e 
468 | Scoria ...:.. ah Camp 48.....--0- ; 
469 | Pitch stone, earn) do Onn BF i esos ‘ 
470 | Porphyry, (purpl HFOUG) occcaceueee do do 
471 |....do....(purple,) with large oie of feldspar..... do Camp 54... 2.00 cen 
472 | Trachyte, (pale purple) do Camp 46 iccecescac 
473 | Obsidian, with crystals of red feldspar do Camp 57..... cuuke 
474 | Quartz pebble, valley drift do Camp 54.000 deca ‘ 
475 | Porphyry, (purple and white) do Camp 57 cnccnd sae 
476 | Granular obsidian do do 
477 | Pearl stone, containing garnet in spherical masses do do 
478 | Tufaceous trachyte, (yellow, veined with red) ..-... do OBEED £5 ook dunes 
479 | Trachyte Leroux’s Spring, San Francisco moun- 
480 | Lava Mount Taylor, Hay Camp, N. Mexico. 
481 | Volcanic tufa Black mountains, Camp 62.......-- ie 
482 | Obsidian, (gray) San Francisco mountain ............ 
483 | Stratified tufa Black mountains, Camp 62..... epee st 
as rem rloic tah see ns sain snes cece sane wenacicenses seen siectvel | Mouth of Rio Virgen 
485 | Volcanic: tufa, containing onyx Black mountains, Camp 61.......... 
486 | Carnelian rolled pebble, valley drift do 
487 | Black basalt....do do do do - 
488 | Carb. lime, masses in tufa ...... do Camp 56...... cages 
IV.—TERTIARY ROCKS, BANKS OF COLORADO. 
489 | Silicified wood Desert surface, Camp 14 
490 | Infusorial rock : Beaver Island 
491 410 do 
492 do White rock, Camp 35 
493 do do do ea = 
494 | Red sandstone associated with No. 493 do do.... 
495 | Infusorial rock do Wee foe Vi se.. S cece 
496 |....do - do Wy igecee Soncee cs 
497 do do. MD fet Ande idee cues 
498 | Sandstone incrusted with carb. lime Monument caiion .----- -----+-----+ 
499 | Sandstone, (drab, coarse) eee 
500 Metamorphic conglomerate do emer 
