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Series: GSA Field Guide
Published: 01 January 2009
DOI: 10.1130/2009.fld015(13)
EISBN: 9780813756158
... and climb steps to viewing area. Abstract More than 80 small volcanoes are scattered throughout the Portland-Vancouver metropolitan area of northwestern Oregon and southwestern Washington. These volcanoes constitute the Boring Volcanic Field, which is centered in the Neogene Portland Basin...
Journal Article
Journal: GSA Bulletin
Published: 01 September 1995
GSA Bulletin (1995) 107 (9): 1051-1062.
...Richard J. Blakely; Ray E. Wells; Thomas S. Yelin; Ian P. Madin; Marvin H. Beeson Abstract Seismic activity in the Portland-Vancouver metropolitan area may be associated with various mapped faults that locally offset volcanic basement of Eocene age and younger. This volcanic basement is concealed...
Journal Article
Published: 01 March 1975
Canadian Journal of Earth Sciences (1975) 12 (3): 464-471.
...G. E. Rouse; W. H. Mathews; R. H. Blunden Abstract Sediments bordering Burrard Inlet in Greater Vancouver are described as the Lions Gate Member of the Burrard Formation. This new member, comprising the lowest part of the previously defined Burrard Formation, rests nonconformably upon deeply...
Journal Article
Journal: Economic Geology
Published: 01 August 2012
Economic Geology (2012) 107 (5): 991-1042.
... encountered only in drill core, in the Patch Lake area associated with the Madrid deposit ( Fig. 4B ; Sherlock et al., 2003a , b ). The Deformation zone is a strongly foliated, recessively weathering unit consisting of contorted quartz, mica, iron-bearing carbonate schist with disseminated pyrite ( Fig. 3E...
FIGURES | View All (39)
Journal Article
Journal: Geophysics
Published: 20 May 2010
Geophysics (2010) 75 (3): B103-B114.
... data, an unconstrained EMI inversion is very sensitive to adjacent anomalies and to the size of the mask used in areas without nearby anomalies. The masking procedure helps ensure that signals from adjacent anomalies do not affect the inversion results. In addition, from a practical standpoint...
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Journal Article
Journal: AAPG Bulletin
Published: 01 June 2012
AAPG Bulletin (2012) 96 (6): 1099-1119.
... of this article is to provide awareness of the nature and variability in pore structures within gas shales and not to provide a representative evaluation on the previously mentioned North American reservoirs. To understand the pore system of these rocks, the total porosity, pore-size distribution, surface area...
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Journal Article
Published: 01 April 1992
Canadian Journal of Earth Sciences (1992) 29 (4): 601-608.
...D. R. Auld; S. E. Dosso; D. W. Oldenburg; L. K. Law Abstract Two major earthquakes, magnitude 7.0 in 1918 and magnitude 7.3 in 1946, have occurred this century in the central region of Vancouver Island, British Columbia, Canada. Levelling data in the region indicate relative uplift of 4 mm/year...
Journal Article
Published: 01 March 1990
Bulletin of Canadian Petroleum Geology (1990) 38 (1): 28-38.
Journal Article
Published: 01 October 1973
Journal of Foraminiferal Research (1973) 3 (4): 167-186.
Journal Article
Journal: Geophysics
Published: 11 December 2012
Geophysics (2012) 78 (1): E41-E46.
... in Environmental Technology Technical Symposium and Workshop . Lee W. H. Gader P. D. Wilson J. N. , 2007 , Optimizing the area under a receiver operating characteristic curve with application to landmine detection : IEEE Transactions on Geoscience and Remote Sensing , 45 , 389–397 , doi...
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Journal Article
Journal: Economic Geology
Published: 01 November 2017
Economic Geology (2017) 112 (7): 1673-1717.
... and consists of dark greenish-gray, well-bedded, and sorted sandstone with interbedded laminated (<3 mm) mudstone. The youngest unit of the Nicola Group exposed in the area consists of a pla- gioclase-phyric andesite breccia (V8; Fig. 4C ), which is matrix supported with subangular fragments (up to 1-cm...
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Journal Article
Published: 01 April 2010
American Mineralogist (2010) 95 (4): 527-536.
... morphology for any size fraction. Measured size ranges and modal crystal content are consistent with previous reported data. Relative frequency and area ratios between crystals of different sizes and shape properties differ from previous assessments. Olivine CSDs are consistent with a power-law distribution...
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Journal Article
Published: 01 September 2008
Journal of Environmental and Engineering Geophysics (2008) 13 (3): 193-210.
... in the survey area are known. A ranking scheme was developed by assuming that a particular target type is more likely when it requires less remanent magnetization to fit the measured dipole moment. If data are unable to constrain parameters, a priori information must be included in the inversion. In many...
FIGURES | View All (16)
Journal Article
Journal: Economic Geology
Published: 01 January 2009
Economic Geology (2009) 104 (1): 95-112.
... Territory, and Cassiar, British Columbia, Canada. Accelerated weathering is attributed to a dramatic increase in surface area, which occurs during the milling of ore. We provide a detailed account of the natural process of carbon trapping and storage as it occurs at Clinton Creek and Cassiar, including...
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Journal Article
Published: 01 May 1974
Canadian Journal of Earth Sciences (1974) 11 (5): 664-677.
...Lionel Carter Abstract Modern sands and gravels from Barkley Sound, Vancouver Island, are mainly composed of igneous lithic fragments, present in sediments coarser than medium sand, and of andesine plagioclase, present in finer size fractions. Heavy mineral assemblages are dominated by hornblende...
Series: Special Publications of the Society of Economic Geologists
Published: 01 January 2013
DOI: 10.5382/SP.17.04
EISBN: 9781629491639
... in Figure 2 . The various plutonic and volcanic suites relative to the metamorphic substrate are emphasized in Figure 3 . The study area is predominantly underlain by the northern part of the allochthonous Yukon-Tanana terrane (Fig. 1 ). Several other tectonic elements of the intermontane terranes...
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Journal Article
Published: 02 June 2011
Canadian Journal of Earth Sciences (2011) 48 (6): 973-986.
...Graham D.M. Andrews; Alain Plouffe; Travis Ferbey; James K. Russell; Sarah R. Brown; Robert G. Anderson Abstract Analysis of over 10 000 water-well records has been used to produce new depth-to-bedrock maps for areas around five cities on the central Interior Plateau of central British Columbia...
Journal Article
Published: 27 July 2000
Canadian Journal of Earth Sciences (2000) 37 (8): 1093-1107.
... in this region include the Late Cretaceous Buckley and Eocene Nanika intrusive suites of the western Skeena Arch, as well as the Eocene Babine igneous suite in the Babine Lake area to the east ( Carter 1976 ). Coeval Upper Cretaceous volcanic rocks of the Brian Boru Formation are locally preserved in the western...
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Series: NRC Monograph Publishing Program
Published: 01 January 2003
DOI: 10.1139/9780660190921
EISBN: 9780660190938
Journal Article
Journal: GSA Bulletin
Published: 01 October 1994
GSA Bulletin (1994) 106 (10): 1293-1303.
... $10 million damage (1964 Canadian dollars) to communities on Vancouver Island. Because such tsunamis can be expected in the future, they pose a hazard to people and property in some coastal areas. Geological Society of America 1994 ...