CATALOGUE OF GEOLOCICAL COLLECTIONS. 139 
CATALOGU E—Continued. 
No. Name. Locality. 
268 | Jaspery porphyry Black mountains 
269 | Porphyry do 
270 | Porphyritic scoria do 
271 | Trachytic porphyry do 
272 | Porphyry, white, with crystals of limpid quartz do 
273 | Banded porphyry do 
274 | Trachyte, (purple) do 
275 | Porphyry do 
276 | Trachyte do 
277 | Scoriaceous basalt G6 ee Camp 48 .cccsunanie 
278 Porphyry do do 
279 | Porphyritic feats do do 
280 | Volcanic t do do 
281 | Silicified aaa from Tertiary strata Jesup rapids 
282 | Porphyry Black mountains, Camp 49...... ..0« 
283 do (mottled white and red) 
284 | Trachyte with Jasper do do 
285 | Brecciated trachyte GOs canecece CAMP: Ol wane ncomie 
286 | Porphyry 0. coowionan OUD £9 casncen * 
287 | Tufaceous trachyte, (white, veined with red) Mouth of Black cafion .........--20- 
288 | Porphyry Sees do 
289 | Trachytic porphyry Black mountains, Camp 50.......... 
290 do do dO. .s65 ccs CAD 40, ond sake 
291 | Porphyry, (white) do do 
292 do do do 
AS See fs None (pinkish white) do do 
294 | Obsidian, containing crystals of red feldspar and scales of mica.......--------- wweaes GOs 
295 Trachyte do mouth of Black cafion. 
296 do. .. (white) i eran Camp 49... <sssas 
297 | Porphyry, (purplish) WU. seni sm cco Camp 57...0s0- 400 
298 |....do.... (lilac) Mouth of Black cafion ......00.-cses 
299 |....do.... (purple) do 
300 | Silicious Ait (purple) Black mountains, Camp 49.......... 
301 | Hornblende do 
302 | Porphyritic scoria do do 
303 | Trachytic porphyry, (dark red) G0. cise ese CMD D1 pisces 
804 | Porphyry, white, with crystals of hornblende do do..., 
305 |....do.... (pink and banded) O05 cine nein OOD, SO came eniin 
306 |....do.... (brown) do. .--- 20+ Camp 49.... ...0- 
307 | Scoriaceous basalt Walls of cafion...Camp 57.......... 
308 | Trachyte, (pale red) Black cation 
309 Porphyry, (purple) Black mountains, Camp 49...... 0. 
310 | Jasper, (striped) do... do 
311 | Porphyry, (brownish and mottled) Walls of caiion...Camp 57.......... 
312 | Basalt (black) overlying Tertiary sandstones Mouth of Black cafion ........--++-+ 
313 | Porphyry, (light yellow, veined) Black mountains, Camp 49.......... 
314 | Trachyte, (gray’ do do 
315 | Porphyry, (black and red mottled) do. Camp 57...-00s00- 
