Alaskan Geological and Geophysical Transect by Ruth A. M. Schmidt, Warren J. Nokleberg, Robert A. Page PDF

By Ruth A. M. Schmidt, Warren J. Nokleberg, Robert A. Page

ISBN-10: 0875906532

ISBN-13: 9780875906539

ISBN-10: 1118667360

ISBN-13: 9781118667361

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The striking difference in reflection geometry between the upper and lower reflection bands may reveal the bottom of the Chugach terrane and the top of underplated rocks. Simple updip projection of the upper reflection band, which is probably caused by a midcrustal decollement, suggeststhat this decollement would outcrop 40- to 50-km south of the end of the Chugach seismic line. This outcrop range lies just 12-km north of the surface trace of the Contact fault system, the suture between the Chugach and the more outboard terranes to the south.

The striking difference in reflection geometry between the upper and lower reflection bands may reveal the bottom of the Chugach terrane and the top of underplated rocks. Simple updip projection of the upper reflection band, which is probably caused by a midcrustal decollement, suggeststhat this decollement would outcrop 40- to 50-km south of the end of the Chugach seismic line. This outcrop range lies just 12-km north of the surface trace of the Contact fault system, the suture between the Chugach and the more outboard terranes to the south.

Coney, and G. Plafker, Lithotectonic terrane map of Alaska, h N. J. Silberling and D. L. S. Geological Survey Open-File Report 84-523, A1-A12, 4 sheets, scale 1:2,500,000, 1984. Page, R. , C. D. Stephens, and J. C. Lahr, Seismicity of the Wrangell and Aleutian Wadati-Benioff zones and the North American plate along the Trans-Alaska Crustal Transect, Chugach Mountains and Copper River basin, southern Alaska, Journal of Geophysical Research, 1989, in press. , W. J. Nokleberg, and J. S. Lull, Bedrock geology and tectonic evolution of the Wrangellia, Peninsular, and Chugach terranes along the Trans-Alaska Crustal Transect in the northern Chugach Mountains and southern Copper River basin, Journal of Geophysical Research, 1989, in press.

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Alaskan Geological and Geophysical Transect by Ruth A. M. Schmidt, Warren J. Nokleberg, Robert A. Page


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