50 DESCRIPTION OF THE COUNTRY. 
ROUGH ESTIMATE—Continued. 
Section. Distance in | No. of sq. miles Character. 
miles. in belt 30 miles 
wide. 
From Anton Chico to Rio Grande. ...... 85 2,550 Woodland, + =  510sq. miles. 
Cultivable soil, A A wee = A dui 
Boot? hiis, FL —-- — 510 do. 
Prairie int ‘pasture land, 2 — 1,530 do. 
“From Rio Grande to Campbell’s Pass of 95 2,850 oodlan == | ‘260 00 
the Sierra Madre Cultivate E cid = ¡5190 udo. 
Rocky h 8, th Lee ee ae == E dos 
| Prairie had ‘pasture, dër — 2,280 do. 
From Campbell’s Pass to Flax veer. .-.- 110 3,300 Woodland, +1; == 820 do. 
| culiao SOM, HI ee A 
| 8, dë daté rent San DER ds 
Pei Es. pasture, 45,-... = 2,640 do. 
From Flax river to San Francisco Pass... 100 3,000 odland, + > 21000: do: 
SE SOLE, ee == 200. HO. 
Roc cky hills, de EE == + 800 de. 
Prairie and pasture land, 44; — — 3, 100 do. 
From San Francisco Pass to Aztec Pass.. T3 2,190 ; À SS BT dos 
Cultivable soil, De clas pacs a 0 E 219. de. 
Rocky hills; 15-.-..5. 2. ==» 109 do. 
Prairie and ‘pasture land, 44 — 1,204 do. 
From Aztec Pass to mouth of White Cliff 42 1,260 Woodland, 4 = 84 do. 
creek. Cultivable soll E s zd 84 do. 
hoc I Le A Mc us dou. LATUR M AA SOSA OA Ry DIS, E 84 do. 
Praine ery ‘pasture land, ps =F, 082. "do. 
From mouth of White Cliff creek to 60 1,800 oodland, 415-...-...... € 18 do. 
Rio Colorad Gen EE Ce 160 aon 
Rocky: hills) lee a... Ll. = 90 do. 
| Prairie and pasture land, x4; — 1,692 do. 
From Rio Colorado to Soda lake-....... | 84 2,520 Woodland, 53> c4 40:0. 
Cultivable soil, s%5------- dem 10 do. 
Rocky hills, Me E E = 50 00. 
desert, AN 5.0106: do. 
Prairieand pasture land, #65 — 2,335 do. 
From Soda lake to northwest bend of 61 1,830 Woodland, än am 7 do. 
Rio Mojave. Cultivable soil, 45-...-..- = 61 do. 
Rocky E ba EE GE = do. 
Sandy desert, 45..-......- do. 
Prairie i aad pasture land Hb ds Hn do. 
MINERALOGICAL RESOURCES. 
For full and specific information upon this subject, I beg leave to refer to the geological 
reports. The following brief remarks are intended to convey a few general ideas regarding the 
value of the mineralogical outcrops of the country in relation to the construction and support of 
a railway. Many of the details here submitted were compiled from the Resumé of Mr. Marcou, 
geologist and mining engineer to the expedition. In some cases its concise language has been 
retained. Generally, the remarks have been condensed, and facts derived from other sources 
have been added. 
The alluvium of the great valley of the Mississippi extends along the banks of the river 
Arkansas as far west as Little Rock. This place is situated upon a slaty hill, at the commence- 
ment of a metamorphic ridge of mountains. Upon the river's banks, a "A distance above 
