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Filtering by: Date 1994 Degree Name Doctor of Philosophy (Ph.D.) File Format application/pdf

Volcanology and petrology of the Rattlesnake Ash-Flow Tuff, eastern Oregon

Creator:

Streck, Martin J.

Abstract:

The Rattlesnake Ash-Flow Tuff erupted 7.05±0.01 Ma from the western Harney Basin, southeastern Oregon. The location of the vent area is inferred based on vent-ward increases in size of pumices, in degree of welding, and in degree of post-emplacement crystallization. Today's outcrops cover 9000 km2 and estimated original outcrop coverage...

Resource Type:

Dissertation
Mandatory versus voluntary adult learners : implications for trainers

Creator:

Noone, Sharron M.

Abstract:

During the past fifteen years, Professor John Keller has developed a systematic, comprehensive model to motivate adult learners. Its major elements are Attention- Relevance-Confidence-Satisfaction (ARCS), and research with volunteers confirms that the strategies improve adult responses in learning settings. Training in business and industry, however, often involves mandatory attendance by...

Resource Type:

Dissertation
Environmental factors and plant-animal interactions on rocky shores along the Oregon coast

Creator:

Brosnan, Deborah M.

Abstract:

Factors affecting the persistence of mussels (Mytilus californianus) and their associated epibiont species were studied along the central Oregon coast. Interactions between mussels and their algal epibionts (Endocladia muricata) varied in sign and strength with environmental conditions. In extreme temperatures mussel—epibiont interactions determined survival of individual mussels, and persistence of...

Resource Type:

Dissertation