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• 1. [Article] The Ore bin ; Vol. 32 No. 5 (May 1970)

  This report summarizes results of geologic mapping in the South Umpqua Falls region of the Western Cascade Range in Douglas County, southwestern Oregon (plate 1). Rocks of the Western Cascades range in ...

  Citation × Citation Citation Abstract Copy Title: The Ore bin ; Vol. 32 No. 5 (May 1970) Author: Kays, Marvin Allan, 1934-, Oregon. Dept. of Geology and Mineral Industries This report summarizes results of geologic mapping in the South Umpqua Falls region of the Western Cascade Range in Douglas County, southwestern Oregon (plate 1). Rocks of the Western Cascades range in age from late Eocene to late Miocene and consist of deformed and partially altered flows, pyroclastic rocks, and interlayered sedimentary rocks (Peck and others, 1964). In the area of this investigation, Tertiary units include the Colestin Formation of late Eocene age, the Little Butte Volcanic Series of Oligocene and early Miocene age, and the Sardine Formation of possible middle and late Miocene age. It is notable that older Tertiary rocks, present both to the north and to the south, are absent beneath the rocks of the Colestin Formation in this region. In the vicinity of Tiller, west of the mapped area, pre-Tertiary plutonic and metamorphic rocks form the basement and are overlain with profound unconformity by strata of the Colestin Formation. Rocks of the Western Cascade Range are capped to the east by younger volcanic rocks of the High Cascade Range. Title: The Ore bin ; Vol. 32 No. 5 (May 1970) Author: Kays, Marvin Allan, 1934-, Oregon. Dept. of Geology and Mineral Industries This report summarizes results of geologic mapping in the South Umpqua Falls region of the Western Cascade Range in Douglas County, southwestern Oregon (plate 1). Rocks of the Western Cascades range in age from late Eocene to late Miocene and consist of deformed and partially altered flows, pyroclastic rocks, and interlayered sedimentary rocks (Peck and others, 1964). In the area of this investigation, Tertiary units include the Colestin Formation of late Eocene age, the Little Butte Volcanic Series of Oligocene and early Miocene age, and the Sardine Formation of possible middle and late Miocene age. It is notable that older Tertiary rocks, present both to the north and to the south, are absent beneath the rocks of the Colestin Formation in this region. In the vicinity of Tiller, west of the mapped area, pre-Tertiary plutonic and metamorphic rocks form the basement and are overlain with profound unconformity by strata of the Colestin Formation. Rocks of the Western Cascade Range are capped to the east by younger volcanic rocks of the High Cascade Range. Close

• 2. [Article] The Ore bin ; Vol. 32 No. 6 (June 1970)

  Periodic violent eruptions from many different centers during Cenozoic time deposited vast quantities of pyroclastic material as ash-flow tuffs over most of Oregon, although the Coast Ranges and isolated ...

  Citation × Citation Citation Abstract Copy Title: The Ore bin ; Vol. 32 No. 6 (June 1970) Author: Walker, George Walton, 1921-, Oregon. Dept. of Geology and Mineral Industries Periodic violent eruptions from many different centers during Cenozoic time deposited vast quantities of pyroclastic material as ash-flow tuffs over most of Oregon, although the Coast Ranges and isolated patches elsewhere in the state appear to have been spared these recurring inundations. Eruptions occurred at different times throughout the Cenozoic, and for purposes of description, they can be separated into three age groups: an older one of Eocene, Oligocene, and Miocene age, an intermediate one of early and middle Pliocene age, and a young group of late Pliocene, Pleistocene, and Holocene age. Some of these ash-flow tuffs are of small volume, less than a cubic mile, and are related to fissure vents, small domal complexes, or calderas from which several kinds of volcanic products were erupted. A few cover thousands of square miles, have volumes of tens of cubic miles, and apparently are related to a large-scale basinal collapse structure and associated calderas. Most ash-flow tuffs are rhyolite or dacite; a few are peralkaline soda rhyolite. Older ash-flow tuffs are commonly diagenetically altered to a variety of secondary minerals; of the younger tuffs, only those that erupted into shallow lakes exhibit comparable alteration. Title: The Ore bin ; Vol. 32 No. 6 (June 1970) Author: Walker, George Walton, 1921-, Oregon. Dept. of Geology and Mineral Industries Periodic violent eruptions from many different centers during Cenozoic time deposited vast quantities of pyroclastic material as ash-flow tuffs over most of Oregon, although the Coast Ranges and isolated patches elsewhere in the state appear to have been spared these recurring inundations. Eruptions occurred at different times throughout the Cenozoic, and for purposes of description, they can be separated into three age groups: an older one of Eocene, Oligocene, and Miocene age, an intermediate one of early and middle Pliocene age, and a young group of late Pliocene, Pleistocene, and Holocene age. Some of these ash-flow tuffs are of small volume, less than a cubic mile, and are related to fissure vents, small domal complexes, or calderas from which several kinds of volcanic products were erupted. A few cover thousands of square miles, have volumes of tens of cubic miles, and apparently are related to a large-scale basinal collapse structure and associated calderas. Most ash-flow tuffs are rhyolite or dacite; a few are peralkaline soda rhyolite. Older ash-flow tuffs are commonly diagenetically altered to a variety of secondary minerals; of the younger tuffs, only those that erupted into shallow lakes exhibit comparable alteration. Close

• 3. [Article] The Ore bin ; Vol. 35 No. 11 (November 1973)

  (1) Field mapping and biostratigraphic data indicate that the Yamhill Formation overlies and is younger than the Tyee Formation; interfingering of the two formations is not indicated. (2) Stewart's correlation ...

  Citation × Citation Citation Abstract Copy Title: The Ore bin ; Vol. 35 No. 11 (November 1973) Author: McWilliams, Robert Gene, 1939-, Oregon. Dept. of Geology and Mineral Industries (1) Field mapping and biostratigraphic data indicate that the Yamhill Formation overlies and is younger than the Tyee Formation; interfingering of the two formations is not indicated. (2) Stewart's correlation of the Yamhill Formation with the Sacchi Beach member of the Tyee was based on incomplete knowledge of the range in time of key species. Presently available information rules out age equivalence of the two units. (3) Available biostratigraphic data suggest that the sub-Yamhill "Siletz River" is younger than the sub-Tyee Siletz River and may even be post-Tyee in age. Title: The Ore bin ; Vol. 35 No. 11 (November 1973) Author: McWilliams, Robert Gene, 1939-, Oregon. Dept. of Geology and Mineral Industries (1) Field mapping and biostratigraphic data indicate that the Yamhill Formation overlies and is younger than the Tyee Formation; interfingering of the two formations is not indicated. (2) Stewart's correlation of the Yamhill Formation with the Sacchi Beach member of the Tyee was based on incomplete knowledge of the range in time of key species. Presently available information rules out age equivalence of the two units. (3) Available biostratigraphic data suggest that the sub-Yamhill "Siletz River" is younger than the sub-Tyee Siletz River and may even be post-Tyee in age. Close

• 4. [Article] The Ore bin ; Vol. 26 No. 8 (August 1964)

  Introduction -- Stratigraphy -- Nye mudstone -- Astoria Formation -- Unnamed unit -- Age of Miocene sequence -- Foraminiferal fauna -- Molluscan fauna -- References

  Citation × Citation Citation Abstract Copy Title: The Ore bin ; Vol. 26 No. 8 (August 1964) Author: Wagner, Holly Clyde, 1918-, Snavely, Parke Detweiler, 1919-, Rau, Weldon W., Oregon. Dept. of Geology and Mineral Industries Introduction -- Stratigraphy -- Nye mudstone -- Astoria Formation -- Unnamed unit -- Age of Miocene sequence -- Foraminiferal fauna -- Molluscan fauna -- References Title: The Ore bin ; Vol. 26 No. 8 (August 1964) Author: Wagner, Holly Clyde, 1918-, Snavely, Parke Detweiler, 1919-, Rau, Weldon W., Oregon. Dept. of Geology and Mineral Industries Introduction -- Stratigraphy -- Nye mudstone -- Astoria Formation -- Unnamed unit -- Age of Miocene sequence -- Foraminiferal fauna -- Molluscan fauna -- References Close

• 5. [Article] The Ore bin ; Vol. 28 No. 5 (May 1966)

  Introduction -- An enigma in Diller's mapping in the Port Orford folio -- Jurassic slates -- Age of metamorphism and plutonism -- Reinterpretation of the "Jurassic slates" and the pre-Portlandian unconformity ...

  Citation × Citation Citation Abstract Copy Title: The Ore bin ; Vol. 28 No. 5 (May 1966) Author: Dott, Robert H., 1929-, Oregon. Dept. of Geology and Mineral Industries Introduction -- An enigma in Diller's mapping in the Port Orford folio -- Jurassic slates -- Age of metamorphism and plutonism -- Reinterpretation of the "Jurassic slates" and the pre-Portlandian unconformity -- Galice-Colebrooke-Dothan rocks delineated -- Conglomerate sequence above unconformity -- Conclusions -- References cited Title: The Ore bin ; Vol. 28 No. 5 (May 1966) Author: Dott, Robert H., 1929-, Oregon. Dept. of Geology and Mineral Industries Introduction -- An enigma in Diller's mapping in the Port Orford folio -- Jurassic slates -- Age of metamorphism and plutonism -- Reinterpretation of the "Jurassic slates" and the pre-Portlandian unconformity -- Galice-Colebrooke-Dothan rocks delineated -- Conglomerate sequence above unconformity -- Conclusions -- References cited Close

• 6. [Article] The Ore bin ; Vol. 27 No. 2 (February 1965)

  A brief history of the Oregon Portland Cement Co. / F. E. McCaslin -- The age of Clear Lake, Oregon / G. T. Benson -- Oregon's lost meteorites / Erwin F. Lange.

  Citation × Citation Citation Abstract Copy Title: The Ore bin ; Vol. 27 No. 2 (February 1965) Author: Benson, Gilbert Thomas, 1929-, McCaslin, F. E., Lange, Erwin F., Oregon. Dept. of Geology and Mineral Industries A brief history of the Oregon Portland Cement Co. / F. E. McCaslin -- The age of Clear Lake, Oregon / G. T. Benson -- Oregon's lost meteorites / Erwin F. Lange. Title: The Ore bin ; Vol. 27 No. 2 (February 1965) Author: Benson, Gilbert Thomas, 1929-, McCaslin, F. E., Lange, Erwin F., Oregon. Dept. of Geology and Mineral Industries A brief history of the Oregon Portland Cement Co. / F. E. McCaslin -- The age of Clear Lake, Oregon / G. T. Benson -- Oregon's lost meteorites / Erwin F. Lange. Close

• 7. [Article] The Ore bin ; Vol. 35 No. 3 (March 1973)

  The purpose of this study of the Lyons flora is to determine the age and paleoecology of the flora through the examination and identification of the fossil plant species of the flora. The plant fossils ...

  Citation × Citation Citation Abstract Copy Title: The Ore bin ; Vol. 35 No. 3 (March 1973) Author: Meyer, Herb, Oregon. Dept. of Geology and Mineral Industries The purpose of this study of the Lyons flora is to determine the age and paleoecology of the flora through the examination and identification of the fossil plant species of the flora. The plant fossils comprising the Lyons flora were collected from a locality in the upper Thomas Creek area, 5 miles southeast of the town of Lyons, Oregon. Title: The Ore bin ; Vol. 35 No. 3 (March 1973) Author: Meyer, Herb, Oregon. Dept. of Geology and Mineral Industries The purpose of this study of the Lyons flora is to determine the age and paleoecology of the flora through the examination and identification of the fossil plant species of the flora. The plant fossils comprising the Lyons flora were collected from a locality in the upper Thomas Creek area, 5 miles southeast of the town of Lyons, Oregon. Close

• 8. [Article] The Ore bin ; Vol. 27 No. 7 (July 1965)

  Introduction -- Cones and flows of questionable recent age -- Volcanic history of the Sand Mountain Lava Field -- Eruptive rocks from Inacessible alignment and Twin Craters -- Hoodoo Butte -- History of ...

  Citation × Citation Citation Abstract Copy Title: The Ore bin ; Vol. 27 No. 7 (July 1965) Author: Taylor, Edward M., 1933-, Oregon. Dept. of Geology and Mineral Industries Introduction -- Cones and flows of questionable recent age -- Volcanic history of the Sand Mountain Lava Field -- Eruptive rocks from Inacessible alignment and Twin Craters -- Hoodoo Butte -- History of the Belknap Volcano -- Blue Lake Crater -- The Spatter Cone Chain -- Sims and Condon Buttes -- Volcanic history of Yapoah Cone and related vents -- Volcanic history of Four-in-Once Cone and related vents -- Volcanic history of Collier Cone -- Continuity in the volcanic record -- Acknowledgment -- Glossary of selected terms -- References Title: The Ore bin ; Vol. 27 No. 7 (July 1965) Author: Taylor, Edward M., 1933-, Oregon. Dept. of Geology and Mineral Industries Introduction -- Cones and flows of questionable recent age -- Volcanic history of the Sand Mountain Lava Field -- Eruptive rocks from Inacessible alignment and Twin Craters -- Hoodoo Butte -- History of the Belknap Volcano -- Blue Lake Crater -- The Spatter Cone Chain -- Sims and Condon Buttes -- Volcanic history of Yapoah Cone and related vents -- Volcanic history of Four-in-Once Cone and related vents -- Volcanic history of Collier Cone -- Continuity in the volcanic record -- Acknowledgment -- Glossary of selected terms -- References Close

• 9. [Article] The Ore bin ; Vol. 31 No. 10 (October 1969)

  Introduction -- Petrographic procedure -- Pearse Peak and related plutons -- Pearse Peak pluton -- Benson Creek pluton -- Granite Peak pluton -- Johnson Creek pluton -- Gray Butte and Lawson Creek plutons ...

  Citation × Citation Citation Abstract Copy Title: The Ore bin ; Vol. 31 No. 10 (October 1969) Author: Lund, Ernest H., Oregon. Dept. of Geology and Mineral Industries, Baldwin, Ewart Merlin, 1915- Introduction -- Petrographic procedure -- Pearse Peak and related plutons -- Pearse Peak pluton -- Benson Creek pluton -- Granite Peak pluton -- Johnson Creek pluton -- Gray Butte and Lawson Creek plutons -- Iron Mountain pluton -- Miscellaneous plutons -- Sixes River Middle Fork pluton -- Game Lake Lookout pluton -- Collier Butte (extension) -- Rock in quarry on Johnson Creek road -- Lobster Creek-Boulder Creek metagabbro -- Summary and conclusions -- Petrology -- Age and correlation -- References. Title: The Ore bin ; Vol. 31 No. 10 (October 1969) Author: Lund, Ernest H., Oregon. Dept. of Geology and Mineral Industries, Baldwin, Ewart Merlin, 1915- Introduction -- Petrographic procedure -- Pearse Peak and related plutons -- Pearse Peak pluton -- Benson Creek pluton -- Granite Peak pluton -- Johnson Creek pluton -- Gray Butte and Lawson Creek plutons -- Iron Mountain pluton -- Miscellaneous plutons -- Sixes River Middle Fork pluton -- Game Lake Lookout pluton -- Collier Butte (extension) -- Rock in quarry on Johnson Creek road -- Lobster Creek-Boulder Creek metagabbro -- Summary and conclusions -- Petrology -- Age and correlation -- References. Close

• 10. [Article] The Ore bin ; Vol. 35 No. 5 (May 1973)

  This study is concerned with the post-Ice Age (Holocene) dunes in the coast segment between Coos Bay on the south and Sea Lion Point on the north. This is the longest strip of dunes along the Oregon coast ...

  Citation × Citation Citation Abstract Copy Title: The Ore bin ; Vol. 35 No. 5 (May 1973) Author: Lund, Ernest H., Oregon. Dept. of Geology and Mineral Industries This study is concerned with the post-Ice Age (Holocene) dunes in the coast segment between Coos Bay on the south and Sea Lion Point on the north. This is the longest strip of dunes along the Oregon coast and extends for a distance of about 55 miles. It is divided into three segments by the Siuslaw and Umpqua Rivers and is interrupted by numerous smaller streams that cross it. The strip has a maximum width of nearly 3 miles at Florence. At places it narrows to less than half a mile, but most of it is more than 2 miles wide. The area where the dunes attain their greatest size, abundance, and variety has been designated the Oregon Dunes National Recreational Area, an administrative division of the Siuslaw National Forest. Title: The Ore bin ; Vol. 35 No. 5 (May 1973) Author: Lund, Ernest H., Oregon. Dept. of Geology and Mineral Industries This study is concerned with the post-Ice Age (Holocene) dunes in the coast segment between Coos Bay on the south and Sea Lion Point on the north. This is the longest strip of dunes along the Oregon coast and extends for a distance of about 55 miles. It is divided into three segments by the Siuslaw and Umpqua Rivers and is interrupted by numerous smaller streams that cross it. The strip has a maximum width of nearly 3 miles at Florence. At places it narrows to less than half a mile, but most of it is more than 2 miles wide. The area where the dunes attain their greatest size, abundance, and variety has been designated the Oregon Dunes National Recreational Area, an administrative division of the Siuslaw National Forest. Close