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Filtering by: Advisor Thies, Richard W. Degree Field Oceanography Degree Level Doctoral

Long wavelength gravity anomalies and implications concerning a descending lithospheric slab in the Pacific Northwest

Creator:

MacFarlane, William Thomas

Abstract:

The thermal regime of a postulated descending lithospheric slab is calculated. The gravity anomaly associated with such a structure is large in amplitude and long in wavelengh. Observed free-air gravity anomalies in the Pacific Northwest do not indicate a gravitational effect due to a descending slab. Two hypothetical compensation models...

Resource Type:

Dissertation

Full Text:

Redacted for Privacy ACKNOWLEDGEMENT I wish to thank my major professor, Dr. R. W. Couch, for the help
Crustal structures and tectonism in southeastern Alaska and western British Columbia from seismic refraction, seismic reflection, gravity, magnetic, and microearthquake measurements

Creator:

Johnson, Stephen Hans

Abstract:

Seismic refraction measurements along two unreversed lines indicate that the earth's crust is 26 km thick in southeastern Alaska and 30 km thick along the Inside Passage of British Columbia. The crust in southeastern Alaska, north of Dixon Entrance, consists of a layer 9 km thick with a seismic velocity...

Resource Type:

Dissertation

Full Text:

This research was initiated and guided by Dr. Richard W. Couch. I am grateful for his advice and