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APPENDIX. 
ings. A full description of the general characters of the rock, as shown at different points, has 
already heen presented. It much resembles a trappean rock, for which it would readily be mis¬ 
taken, in hand specimens, unless the attention was specially directed to its granular structure. 
Specimens from several localities are in the collection, together with masses of the associated 
shales and the metamorphosed portions—the prasoid and jaspery rocks. 
Table showing the elevation above the sea of the principal places mentioned in the report . 1 
Feet. 
Mount Piable—Diablo Range, (Beckwith)......... ..... 3,960 
Madelin Pass, Sierra Nevada, latitude 40° 44' 12"...................___ 5,667 
Plateau of the Sierra Nevada, (Beckwith)..................... 5,440 
Second summit of Madelin Pass, (Beckwith)__......_...._..._...._.....____ • 5,596 
Noble’s Pass, Sierra Nevada___........._..._........_....................... 6,074 
Carson Pass, Sierra Nevada, latitude 38° 42' 15", (Goddard)................. 7,972 
Breccia Pass, near the middle fork of the Stanislaus river, (Goddard)....... 10,150 
Walker’s Pass, Sierra Nevada, latitude 35° 39'......... 5,306 
Humpahyamup Pass, latitude 35° 33' 38“_......_..._.....___..._........._ 5,351 
Taheechaypah Pass, latitude 35° 07' 28"-.-.-......_____..............___..._ 4,008 
Tejon Pass, latitude 35° 02' 47".......i....... 5,364 
Canada de las Uvas, latitude 34° 54' 40".............. 4,315 
Cajon de Zenoco — Bernardino Sierra_............___............._...___ 4,256 
San Francisquito, Bernardino Sierra.—................ 3,445 
Williamson’s, (new Pass,) Bernardino Sierra_____.......___ 3,164 
Cajon Pass, Bernardino Sierra................. 4,676 
San Bernardino or San Gorgono, Peninsula Sierra........................_.... 2,808 
Warner’s Pass — Peninsula Sierra, leading from the Colorado Desert to San Diego...._...._........... 3,780 
San Fernando Pass, between San Francisquito Rancho and San Fernando...._..............._ 1,940 
Livermore’s Pass, Diablo Range, south of Mount Diablo___....___...._..._......... 686 
San Bernardino Mountain, Bernardino Sierra, (elevation undetermined probably)___8,500 
San GorgoDa Mountain, Peninsula Sierra, (elevation undetermined probably) ___...... ...... 7,500 
San Amddio Mountain, at the head of the Tulare Valley, (about);_______....... 7,000 
Fort Miller, on the San Joaquin river, (about).. — .......— 402 
Plain of Basaltic lava at Fort Miller______ —..........-................_ 1,200 
Ocoya Creek Depot Camp... 1.._...-... —...............—......---....... 738 
Tops of the tertiary hills at Ocoya Creek, (about)._......... — -........ — .............- 1,300 
Tejon Depot Camp... —....-...... — ...............-.......................-........ 1,447 
Buena Vista, or Kern Lake— .. — ....-........ — ... —. — - 398 
Dry Lake, in the Great Basin east of the Tejen Pass_......-...................................... 2,380 
Soda Lake, at the sink of the Mojave river.......... — ... — .................. —........... 1,137 
Camp on the Mojave river..........._.........-................---......... 2, 664 
Lake Elisabeth, near the Pass of Francisquito, (about)..... 3,000 
Plain of San Fernando........ — ................................. 1,048 
Valley of the Santa Anna, at San Bernardino.__.........._............................-....... 1,118 
Deep Well, at the margin of the Colorado Desert........... — ..... — --........ 160 
Valley of the Ancient Lake, Colorado Desert. This depression is estimated below the level of the sea. 
Big Lagoon, Colorado Desert.................... 70 
Fort Yuma, junction of the Gila and Colorado____...-...— -- — .....—.....— 108 
San Felipe Valley, Peninsula Sierra............. —. .. 2,176 
Warner’s Valley, or Rancho, near Agua Caliente....... — i.- 2,911 
i Most of these elevations were determined by the Expedition, and are taken from the tables. 
