Henry C. Berg
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View article: Preliminary integrated geologic map databases for the United States: Digital data for the geology of southeast Alaska
Preliminary integrated geologic map databases for the United States: Digital data for the geology of southeast Alaska Open
The growth in the use of Geographic Information Systems (GIS) has highlighted the need for digital geologic maps that have been attributed with information about age and lithology. Such maps can be conveniently used to generate derivative …
View article: Alaska resource data file: Ketchikan quadrangle
Alaska resource data file: Ketchikan quadrangle Open
Ketchikan quadrangleDescriptions of the mineral occurrences shown on the accompanying figure follow.See U.S. Geological Survey (1996) for a description of the information content of each field in the records.The data presented here are mai…
View article: Alaska resource data file: Prince Rupert quadrangle
Alaska resource data file: Prince Rupert quadrangle Open
Prince Rupert quadrangleDescriptions of the mineral occurrences shown on the ac See U.S. Geological Survey (1996) for a description of the inform in the records.The data presented here are maintained as part on mines, prospects and mineral…
View article: Alaska resource data file: Petersburg quadrangle
Alaska resource data file: Petersburg quadrangle Open
Descriptions of the mineral occurrences shown on the accompanying figure follow.See U.S. Geological Survey (1996
View article: The Geology of Alaska
The Geology of Alaska Open
You get a comprehensive overview of the geology, tectonic evolution, and mineral resources of Alaska and adjacent areas of the continental margin. Plates include state-wide maps showing geology, physiography, lithotectonic terranes, metamo…
View article: A review of the regional geology and tectonics of southeastern Alaska
A review of the regional geology and tectonics of southeastern Alaska Open
Stratified rocksPre-Jurassic stratified rocks in SE Alaska constitute a series of northwest-elongate belts that vary in depositional age and in degree of deformation and metamorphism.These belts occur along the east and west flanks of the …
View article: Metallogeny and major mineral deposits of Alaska
Metallogeny and major mineral deposits of Alaska Open
This report is a preliminary version of a chapter for the volume on Alaskan geology
View article: Placer mining: Yesterday, today, tomorrow: Proceedings of the eighth annual Alaska conference on placer mining-1986
Placer mining: Yesterday, today, tomorrow: Proceedings of the eighth annual Alaska conference on placer mining-1986 Open
l o n g s c o r p i o n s , r a b i d vampire b a t s , and murderously poisonous no-seeurns.
View article: Significant metalliferous lode deposits and placer districts of Alaska
Significant metalliferous lode deposits and placer districts of Alaska Open
From preface: "This report is a compilation of the significant metalliferous lode deposits and placer districts of Alaska, and is a comprehensive data base for a companion article on the metallogenesis and major mineral deposits of Alaska …
View article: Map and description of the mineral deposits in the Petersburg and eastern Port Alexander quadrangles, southeastern Alaska
Map and description of the mineral deposits in the Petersburg and eastern Port Alexander quadrangles, southeastern Alaska Open
Brief description: Barite veins up to 5 feet wide (most are much narrower)
View article: Regional geologic summary, metallogenesis, and mineral resources of southeastern Alaska
Regional geologic summary, metallogenesis, and mineral resources of southeastern Alaska Open
Southeastern Alaska's half-billion year geological record features deposition of marine and continental sedimentary strata, eruptions of compositionally varied marine and subaerial volcanic rocks, and repeated episodes of folding, faulting…
View article: Preliminary Description of the Late Silurian-Early Devonian Klakas Orogeny in the Southern Alexander Terrane, Southeastern Alaska
Preliminary Description of the Late Silurian-Early Devonian Klakas Orogeny in the Southern Alexander Terrane, Southeastern Alaska Open
The Klakas orogeny is a Late Silurian-Early Devonian deformational, metamorphic, and mountain-building event that marks a major change in the geologic history of the southern Alexander terrane. During Ordovician-Silurian time this region w…
View article: Ordovician-Silurian volcanogenic massive sulfide deposits on southern Prince of Wales Island and the Barrier Islands, southeastern Alaska
Ordovician-Silurian volcanogenic massive sulfide deposits on southern Prince of Wales Island and the Barrier Islands, southeastern Alaska Open
Several pyritic massive sulfide deposits have been recognized in an
Ordovician-Silurian volcano-plutonic complex in the southern Prince of
Wales Island region (Fig. 1). These deposits have been studied as part
of a U.S. Geological Surve…
View article: Geology of the Craig quadrangle, Alaska
Geology of the Craig quadrangle, Alaska Open
Diverse Quaternary surficial deposits are widely distributed throughout the quadrangle but have not been separately studied or mapped.Only major areas of distribution are shown and their delineation has been inferred mainly from the examin…
View article: Map and table describing fossil collections and related samples in the Ketchikan and Prince Rupert quadrangles, southeastern Alaska
Map and table describing fossil collections and related samples in the Ketchikan and Prince Rupert quadrangles, southeastern Alaska Open
Presentation of data: Some of the most complete fossil collections descriptions were made by early workers when many of the sites were by mining or logging roads.The table thus lists and related accessible collections in approximate chrono…
View article: The Alaska Mineral Resource Assessment Program: Guide to information about the geology and mineral resources of the Ketchikan and Prince Rupert quadrangles, southeastern Alaska
The Alaska Mineral Resource Assessment Program: Guide to information about the geology and mineral resources of the Ketchikan and Prince Rupert quadrangles, southeastern Alaska Open
The Ketchikan and Prince Rupert 1-degree by 2-degree quadrangles, which encompass about 16,000 km2 at the south tip of southeastern Alaska, have been investigated by integrated field and laboratory studies in the disciplines of geology, ge…
View article: Relation of Metallogenesis to Accreted Tectono-Stratigraphic Terranes in Alaska: ABSTRACT
Relation of Metallogenesis to Accreted Tectono-Stratigraphic Terranes in Alaska: ABSTRACT Open
Alaska consists of a collage of about 50 fault-bounded tectono-stratigraphic terranes of regional extent, as well as numerous smaller blocks. Each terrane possesses a characteristic stratigraphy and structure that differ markedly from thos…
View article: Metallic mineral deposits of southeastern Alaska
Metallic mineral deposits of southeastern Alaska Open
DESCRIPTION Lode Ag.Pb.Zn Replacement in marble Vein Ag.Au.Cu.Pb, Sulfide-bearing vein(?) reported to Zn carry Cu, Zn, and Pb minerals and some Au and Ag.Claim(s) staked in 1906 and restaked in 1951.Adit driven, 1916.
View article: The Alaska Mineral Resource Assessment Program: Guide to information about the geology and mineral resources of the Ketchikan and Prince Rupert quadrangles, southeastern Alaska
The Alaska Mineral Resource Assessment Program: Guide to information about the geology and mineral resources of the Ketchikan and Prince Rupert quadrangles, southeastern Alaska Open
The Ketchikan and Prince Rupert 1° x 2° quadrangles, which encom-2 2 pass about 16,000 km (6,000 mi ) at the southern tip of southeastern Alaska, were investigated by integrated field and laboratory studies in the disciplines of geology, g…
View article: Preliminary map and tables describing metalliferous and selected nonmetalliferous mineral deposits in the Petersburg and eastern Port Alexander quadrangles, Alaska
Preliminary map and tables describing metalliferous and selected nonmetalliferous mineral deposits in the Petersburg and eastern Port Alexander quadrangles, Alaska Open
These tables briefly describe known deposits and principal occurrences of metallic and certain nonmetallic mineral commodities in the Petersburg and eastern Port Alexander quadrangles of southeastern Alaska.The tables and accompanying map …
View article: Table describing metalliferous and selected nonmetalliferous mineral deposits in the Ketchikan and Prince Rupert quadrangles, Alaska
Table describing metalliferous and selected nonmetalliferous mineral deposits in the Ketchikan and Prince Rupert quadrangles, Alaska Open
This table briefly and objectively describes known deposits and principal occurrences of metallic and some nonmetallic mineral commodities in the Ketchikan and Prince Rupert quadrangles of southeastern Alaska.The table and accompanying map…
View article: Mineral resources of the Granite Fiords Wilderness Study Area, Alaska, with a section on aeromagnetic data
Mineral resources of the Granite Fiords Wilderness Study Area, Alaska, with a section on aeromagnetic data Open
million to percent and to ounces per ton and vice versa ------------------------
View article: Analyses of rock and stream-sediment samples from southern Bradfield Canal Quadrangle, southeastern Alaska
Analyses of rock and stream-sediment samples from southern Bradfield Canal Quadrangle, southeastern Alaska Open
The sites sampled by the U.S. Bureau of Mines are shown on plate 1 by site-numbers such as BM30, BM31, etc.This numbering sequence starts with BM28 and is a continuation of the numbering used for USBM sample localities in Open File Report …