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Friday, November 20, 2020 | History

2 edition of Paleomagnetism of the late Miocene plateau basalts in the Cariboo region of British Columbia found in the catalog.

Paleomagnetism of the late Miocene plateau basalts in the Cariboo region of British Columbia

D. T. A. Symons

Paleomagnetism of the late Miocene plateau basalts in the Cariboo region of British Columbia

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  • 24 Currently reading

Published by Dept. of Energy, Mines and Resources in [Ottawa] .
Written in English

    Places:
  • British Columbia.
    • Subjects:
    • Paleomagnetism.,
    • Geology, Stratigraphic -- Miocene.,
    • Flood basalts -- British Columbia.

    • Edition Notes

      Bibliography: p. 10-11.

      Statement[by] D. T. A. Symons.
      SeriesGeological Survey of Canada. Paper, 69-43, Paper (Geological Survey of Canada) ;, 69-43.
      Classifications
      LC ClassificationsQE185 .A42 no. 69-43
      The Physical Object
      Paginationv, 16 p.
      Number of Pages16
      ID Numbers
      Open LibraryOL5771105M
      LC Control Number71499035

      Anderson, J. L., Pomona Member of the Columbia River Ba­ salt Group: an intracanyon flow in the Columbia River Gorge, Oregon, Oreg. Geol, 42, , Anderson, J. L. and B. F. Vogt, Intracanyon flows of the Columbia River Basalt Group in the southwest part of the Columbia Plateau and adjacent Cascade Range, Oregon and. ABSTRACT Miocene flood basalts of the Columbia River Basalt Group inundated eastern Washington, Oregon, and adjacent Idaho between 17 and 6 Ma. Some of the more voluminous flows followed the ancestral Columbia River across the Cascade arc, Puget . Full text of "Report on the Geology of the Mining District of Cariboo, British Columbia" See other formats This is a digital copy of a book that was preserved for generations on library shelves before it was carefully scanned by Google as part of a project to make the world's books discoverable online. The Blind Creek Limestone, Keremeos, British Columbia: Structure and Regional Tectonic Significance W. C. Barnes, J. V. Ross Journal: Canadian Journal of Earth Sciences.


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Paleomagnetism of the late Miocene plateau basalts in the Cariboo region of British Columbia by D. T. A. Symons Download PDF EPUB FB2

A paleomagnetic study was made of cores from 20 sites representing about equally 4 small olivine gabbro plugs which intrude tectonically undisturbed olivine-rich plateau basalts of late Miocene age in the southern Cariboo region of south-central British by: The petrology of several late Tertiary gabbroic plugs in the south Cariboo region, British Columbia.

Unpublished MSc. thesis, Dept. Geology, Univ. British Columbia, Varcouver, 71 pp. GEOLOGICAL. 4 PALEOMAGNETIC ANALYSIS OF MIOCENE BASALT FLOWS, TEHACHAPI MOUNTAINS, CALIFORNIA Table 1.

40 Ar,89 Ar age-spectrum data for Miocene basalt flows from Tehachapi Mountains, Calif. [T °C = degassing temperature. The total of 39 Art and 40 Arr expressed in percent. 39 Ar expressed in moles X 1o K/Ca expressed as apparent K/Ca in mole/ by: 5. D.T.A. SymonsPaleomagnetism of the late Miocene plateau basalts in the Caribou region of British Columbia Geol.

Srv. Can. Paper (), pp. 1 Cited by: Paleomagnetism of Middle Miocene volcanic rocks in the Mojave‐Sonora Desert region of western Arizona and southeastern California Myrl E. Beck, Russell F. Burmester, Eduardo S. Oviedo, Paleomagnetism of the Patagonian Plateau Basalts, southern Chile and Argentina, Journal of Edwin H.

McKee, Style and age of late Oligocene‐early Cited by: Paleomagnetism of the Patagonian Plateau Basalts, Southern Chile and Argentina Author: Robert F. Butler, Francisco Herve, Francisco Munizaga, Myrl E. Beck Jr., Russ R. Burmester, and Eduardo S.

Oviedo Created Date: 9/13/ AM. Paleomagnetism of Middle Miocene Volcanic Rocks in the Mojave-Sonora Desert Region of paleomagnetic declinations in Miocene rocks of this region. However, Hillhouse and Wells [] and Wells and Hill­ [] present paleomagnetic evidence from Late Creta­.

A paleomagnetic study on nine samples from lavas from the Upper Cretaceous Tres Picos Prieto locality (43º50’S and 70º3’W), Patagonian Plateau Basaltic Province, revealed that a ca. m thick pile of basalts accumulated during three discrete (i.e., temporally separated) volcanic episodes. Two characteristic magnetic components (A1 and A2) with distinctive non-overlapping bimodal distributions were palaeomagnetically isolated from what has long been considered as one single phase of post-Oligocene pre-Late Miocene basaltic volcanicity in the ‘east- and west-of-Cairo areas’.

Paleomagnetism and tectonic significance of Albian and Cenomanian turbidites, Ochoco Basin, province may correlate with the Intermontane superterrane in British Columbia. Other interpretations, such as large inclination errors or an independent displacement history for tions in coeval red beds and basalts [Gilder et al., ].

the area that will be referred to as the Mojave region (figure 1). The Mojave region consists of two tectonic provinces. The western -most province, the Mojave block, is the wedge- shaped area bounded by the San Andreas fault on its southwestern side, by the.

1 Introduction. The time‐averaged field initiative (TAFI) program [Johnson et al., ] ended without new data being generated from within 15° of the Equator [Lawrence et al., ], which is a critical region for understanding paleosecular variation of the geomagnetic uently, we undertook studies of the paleomagnetism of lava flows from equatorial regions in Ecuador (∼ Paleomagnetism of the Later Miocene plateau basalts in the Cariboo region of British Columbia.

Geologi-cal Survey of Canada, Paperpp. 1 Regional mapping update, central Queen. Symons's research works with 2, citations and 2, reads, including: Jurassic location of the Yukon-Tanana Terrane from paleomagnetism of the folded Mississippian Tatlmain. UPPER MIOCENE PALEOMAGNETISM IN NORTHERN CI-•E 20,)S 28ø8 Nazca Plate Figure 1.

(a) Schematic map of the southem Central Andes showing the location of the Altiplano (AT) - Puna (PN) plateau. The eastern border of the plateau is marked by the Cordillera Oriental (,CO).

Light shading shows areas above m [after Isacks, ]. Some of the most important evidence came from the study of paleomagnetism, or changes in Earth’s magnetic field over millions of years.

Earth’s magnetic field is defined by the North and South Poles that align generally with the axis of rotation (Figure ). The Hannuoba continental flood basalts are extensively distributed in northern China ().Previous potassium–argon (K–Ar) dating showed that the lava is of Oligocene–Miocene age, emplaced between 30 and 7 Ma (Liu et al., ).Zheng et al.

() reported K–Ar ages of 10–6, 33–22 and 31–17 Ma for the central and the eastern Hannuoba basalts (eastern Inner Mongolia and northern. Symons, D. A., b. Paleomagnetism of Mesozoic plutons in the westernmost Coast Complex of British Columbia. Canadian Journal of Earth Sciences, pp. Symons, D.

A., ta. New Palemagnetic data for the Triassic Guichon Batholith, southcentral British Columbia, and their bearing on Terrane I tectonics. Robert F Butler, George E Gehrels, Maria Luisa Crawford, William A Crawford, Paleomagnetism of the Quottoon plutonic complex in the Coast Mountains of British Columbia and southeastern Alaska: evidence for tilting during uplift, Canadian Journal of Earth.

Late Miocene Carabid Beetle Paleomagnetism of the late Miocene plateau basalts in the Cariboo region of British Columbia. Geological Survey of Canada Paper – Google Scholar. Szalay, F. Systematics of the Omomydae (Tarsiiformes, Primates) taxonomy, phylogeny and adaptations.

Buy this book on publisher's site. CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Paleomagnetic directions have been obtained from early to middle Miocene ( Ma) mafic volcanic flows in 16 mountain ranges in the Mojave-Sonora desert region of western Arizona and southeastern California.

These flows generally postdate early Miocene tectonic deformation accom-modated by low-angle normal. The Chilcotin Group basalts (CGB) are Oligocene to Late Pleistocene, stratified olivine-phyric basaltic lavas that overlie a large proportion of the Interior Plateau of British Columbia.

Four olivine gabbro plugs crop out on the basaltic plateau in the south Cariboo region of British Columbia. The plugs form elliptical knobs of unaltered gabbro which stand to feet above the plateau surface.

They are to feet in greatest diameter, as seen in plan view. Two plugs, Mt. Begbie and Forestry Hill, are described in detail in this thesis. Alignment of tabular feldspar. Dominguez A. & Van der Voo R. Secular variation of the middle and late Miocene geomagnetic field recorded by the Columbia River Basalt Group in Oregon, Idaho and Washington, USA.

Geophys. Int.– (). Tauxe L. & Kent D. research experience in paleomagnetism, it is difficult to build a basic knowledge base of the subject from the existing (and rather imposing) body of paleomagnetic and rock magnetic literature.

This book is intended to teach the interested Earth scientist (student or otherwise) how paleomagnetism. At Garibaldi Lake in southwest British Columbia, a Ma (K/Ar) reversely magnetized basalt overlies a till, pointing to an Early Pleistocene glaciation (Green et al.

Directions of magnetization observed from rock-units from a given continental block are conveniently summarized by a path of apparent polar wander (apw) relative to that block. This article documents. The Chilcotin Group basalts (CGB) are Oligocene to Late Pleistocene, stratified olivine-phyric basaltic lavas that overlie a large proportion of the Interior Plateau of British Columbia.

The distribution of the CGB is poorly understood regionally; the current distribution is based on compilations of previously published geological maps that employ a diverse set of lithostratigraphic.

The Cariboo Plateau is a volcanic plateau in south-central British Columbia, is part of the Fraser Plateau that itself is a northward extension of the North American Plateau. The southern limit of the plateau is the Bonaparte River although some definitions include the Bonaparte Plateau between that river and the Thompson, but it properly is a subdivision of the Thompson Plateau.

mainly Miocene and Oligocene in age. Cameroon, which is one of Africa’s largest active volcanoes, is dominantly of Brunhes (middle and late Pleistocene) age and sits on continental crust near the current coastline [Fitton and Dunlop, ].

The origin of the volcanic rocks is a matter of debate and may be Key Points: Volcanic rocks in Sao. PALEOMAGNETISM AND ROCK MAGNETISM. Paleomagnetic and rock magnetic measurements at Sitewhich is located in the summit region of Detroit Seamount, were aimed at assessing the nature of the natural remanent magnetization (NRM) of basement rock and obtaining a preliminary estimate of the paleolatitude of the site during basement formation (~ Ma, as estimated by.

Figure 1. Extent of the Columbia River basalt in Idaho, Washing- ton, and Oregon. Location of the area considered in this paper is shown on the east side of the plateau.

Basalts are easily recognized in the field, since most flows have distinct physical appearances. Chemical. Advocates of mantle plumes have long considered continental flood basalt provinces one of the most obvious expressions of plume activity (Richards et al., ; Campbell and Griffiths, ).As the youngest (Miocene) and smallest of the classic continental flood basalt provinces, the Columbia River province of the American northwest is particularly appropriate for pursuit of the plume versus.

Zone"—a region presumed to be older than polarity chron M33 (Handschumacher et al., ) and hence having a predicted age of Middle Jurassic (Lancelot et al., ). Drilling at this site was terminated after penetration of 44 m of late Aptian extrusive basalts.

Examination of the paleomagnetic parameters of the extrusive. Paleomagnetism of Eocene Basalts of Mayreau, West Indies: Implications for Contrasts in Tectonic Rotation in the Southeastern Caribbean. International Geology Review: Vol.

39, No. 1. A collection was made in January of 10 oriented samples from each of 54 sites in lavas on Sao Tome Island (nominal location ºN, ºE). Some sites were affected by lightning leaving a total of 42 sites for analysis of paleosecular variation.

Overall magnetic properties were excellent (highly stable magnetizations carried by pseudosingle domain magnetite). Dominguez, A. & Van der Voo, R. Secular variation of the middle and late Miocene geomagnetic field recorded by the Columbia River Basalt Group in Oregon, Idaho and Washington, USA.

Geophys. PALEOMAGNETISM AND ROCK MAGNETISM. Paleomagnetic and rock magnetic measurements at Siteon the summit region of Detroit Seamount, were aimed at assessing the natural remanent magnetization (NRM) of the basement rocks recovered.

PALEOMAGNETISM: Magnetic Domains to Geologic Terranes By Robert F. Butler Originally published by Blackwell Scientific Publications, Because this book is no longer in print and Blackwell has declined to print a second edition, I am publishing it myself using PageMaker and Adobe Acrobat in response to requests by colleagues at universities within the U.S.

and around the world. A collection was made in January of 10 oriented samples from each of 54 sites in lavas on São Tomé Island (nominal location ºN, ºE). Some sites were affected by lightning leaving a total of 42 sites for analysis of paleosecular variation. Overall magnetic properties were excellent (highly stable magnetizations carried by pseudosingle domain magnetite).

The study of Paleomagnetism is what finally proved Alfred Wegner's theory of continental drift. Paleomagnetism in short discovered identical polarities on either side of the mid-Atlantic ridge. Late Miocene Our low temperature interval at El, ca.

Ma, falls in Zone Mi4 (Miller et al., ), but also falls within Barron and Baldauf's () Climate Optimum 2, Ma. In this interval, our chronology is by correlation and interpolation so the proper fit of L1 can not yet be resolved.D.

T. A. Symons has written: 'Geological implications of paleomagnetic studies in the Bella Coola and Laredo Sound map-areas, British Columbia (93D and A)' -- subject(s): Geology.