144 CATALOGUE OF GEOLOGICAL COLLECTIONS, 
CATALOGUE—Continued. 
No. Name. Locality. © 
501 | Red sandstone, (fine) Monument cafion 
502 | Tufaceous sandstone if) ae er eset 
503 | Red conglomerate Red Rock Monument cafion......... 
504 | Coarse red sandstone Monument mountain 
505 | Metamorphic Tertiary (?) limestone, taining i Camp 36 .... 
506 | Infusorial rock ........-. Chemehuevis valley, Camp 38 .. 
507 | Red sandstone Base of Black mountains, Camp 49 .. 
508 | Conglomerate, containing silicified trunks W6 8ts do 
509 | Silicified wood from 508 dee do 
510 | Limestone capping conglomerate bluff do-rers SS do 
511 do do Q0° reesic 2e3 do 
512 | Red sandstone under trap Camp 57 
513 | Red shale under trap 0 cosines ee eee 
514 | Red sandstone under trap seectivesec 0 soos ieee 
515 do do ae Sia 
516 | Infusorial rock do... 2 ete eee eee 
517 | Silicified wood Desert surface, Camp 50 .----....... 
518 | Carb. lime filling veins in White Rock. Camp 35 . 
519 | Infusorial rock, eatin ae White Rock, Camp 35 ..........---- 
520 | Tooth of Hleph IMIgEni: Valley drift, Camp 35 ......-. .-.2-- 
V.—ROCKS FORMING TABLE-LANDS OF THE UPPER COLORADO. 
: a. Azoic. 
521 | Granite, (gray,) base of series Mouth of Diamond river, Camp 67-- 
522 | Granite (red coarse) veins and masses in 521 do i oe 
523 | Red syenite, veins and masses in 521 do do..--=- 
ne b. Silurian and Devonian. 
524 Conglomerate, base of stratified series Caiion of Colorado ...--. Camp 67.. 
525 | Quartzose sand rock, (striped, purple, and white,) lying over 524 do d0..cse2 
526 | Dark red sandstone, overlying 525 do do..---- 
627 | Light brown sandstone, over 526 do G0: seek 
528 | Red shale mud rock, with casts of fucoids (?) over 527, and interstratified with 529.|.<<<.. do - d0..---- 
529 | Red shaly sandstone over last, and interstratified with 530 do 80.2 Sad 
530 | Green oe to 528 ... do. a0... 
531 | Red speckled tone, interstratified with last do gio. 
632 White speckled iniiaiaa: interstratified with last ...._ aie do d0<. sca 
533 | Pebble of 525 Valley drift of Lower Colorado, 
ee Camp 48. 
_ 534 | Thin banded sand rock, with mud furrows, interstratified with shales under 
‘thick bedded standstone 
Cafion Diamond river, Camp 48..-- 
885 | ‘Thin ‘banded sand ~_ with mud 2098 interstratified with shales under 
A Rates tea te da es Ra OSU s. cee - 
do do aes: 
