Byers, F. M. Jr., 1959, Geology of Umnak and Bogoslof Islands, Aleutian Islands, Alaska: in Investigations of Alaskan volcanoes, U.S. Geological Survey Bulletin B 1028-L, p. 267-369, 5 sheets, scale 1 at 1:63,360, 1 at 1:96,000, and 1 at 1:300,000.
full-text PDF : 3.5 MB
plate 39 PDF : 2.2 MB
plate 40 PDF : 3.9 MB
plate 41 PDF : 5.6 MB
plate 48 PDF : 85 KB
talbe 3 PDF : 149 KB


Data tables:
194: Climatological data for two stations on Umnak Island, June 1942 to December 1948

---

195: Analyses of rocks from Umnak and Bogoslof Islands

---

196: Petrographic summary of chemically analyzed rocks from Umnak and Bogoslof Islands

---

197: Petrographic analyses of plutonic rocks (modal analyses in volume percent)

---

198: Partial analyses of hydrothermally altered (potassium feldspathized) volcanic rocks near Bottleneck Pass

---

199: Petrographic analyses of specimens of hypersthene andesite of Mount Recheschnoi

---

200: Petrographic analyses of specimens of hypersthene andesite of Mount Recheschnoi

---

201: Comparative petrographic data: rhyodacite pumice of Mount Vsevidof and pumice fragments in ash beds of archeological profile, Nikolski

---

202: Petrographic analyses of basaltic andesite, andesite, and latite flows of Mount Vsevidof

---

203: Petrographic analyses of rocks in dark andesitic scoria bed of Mount Vsevidof cone

---

204: Petrographic analyses of agglomerate and ash marker beds of the Okmok volcanics

---

205: Petrographic analyses of mafic phenocryst basalt, Okmok Volcano

---

206: Optical data on anorthite phenocrysts in anorthite basalt near Inanudak Bay

---

207: Petrographic analyses of vitreous andesites and latite of Okmok Volcano

---

208: Petrographic analyses of rhyolite specimens and xenolithic inclusion, Okmok Volcano

---

Samples:
45-95
46 ABy 531
46 ABy 92
46 ABy 132
46 AFr 28
46 ABy 609
46 AHp 68
46 ABy 29
45-73
46 ABy 70
46 ABy 45
46 ABy 54
47 ABy 44
46 ABy 13
46 ABy 6
46 ABy 63
46 ABy 15
46 AFr 2
47 ABy 26
46 ABy 30a
48 Um 11
47 ABy 73
47 ABy 10
47 ABy 9
47 ABy 41
47 ABy 34
47 ABy 72
47 ABy 57
47 ABy 36
47 ABy 36
47 ABy 67
47 ABy 54
47 ABy 28
47 ABy 39A
47 ABy 100
47 ABy 103
1
2
K-2184
K-2188
K-2190
K-2192
K-2275
K-2276
K-2277
K-2278
K-2279
K-2280
K-2281
K-2373
K-2374
K-2395
K-2396
K-2397
K-2398
K-2399
K-47
K-2189
K-2191
K-2247
K-2248
K-2249
K-2251
K-2274
K-2274-A
K-2282
K-2283
K-2284
K-2285
K-2286
K-2287
K-2288
K-2290
K-2291
K-2292
K-2293
K-2310
K-2311
K-2313
K-2315
K-2316
K-2321
K-2328
K-2387
K-2389
K-2424
K-2495
KNM-15
KNM-33
K-2185
K-2186
K-2187
K-2294
K-2309
K-2323
K-2327
K-2390
K-2391
K-2393
K-2394
K-2447
K-2447A
K-52
K-170
K-813
K-813i
K-2300
K-2324-A
K-2350-A
K-2350-B
K-2352
K-2400A
K-2400B
K-2521A
K-2521i