Jeffrey S. Marshall


Ph.D. Dissertation


Marshall, J.S., 2000, Active tectonics and Quaternary landscape evolution across the western Panama block, Costa Rica, Central America, Pennsylvania State University, 304 p.


Abstract             Contents             Figures                Photos                 Full Text              Publications


Advisors:           Dr. Thomas W. Gardner and Dr. Donald M. Fisher



I earned my Ph.D. in 2000 from the Geosciences Department at Penn State University. My dissertation is an integrated investigation of late Cenozoic geology, active tectonics, and landscape evolution in Costa Rica, Central America.


This research project combined field techniques of tectonic geomorphology, structural geology, stratigraphy, and geochronology to investigate upper plate deformation along the southern Middle America convergent margin, inboard of the subducting Cocos Ridge.


Chapter 1 examines fault kinematics along a seismically active deformation front that is propagating into the upper plate (Central Costa Rica deformed belt).


Chapter 2 establishes new stratigraphic and geochronologic constraints on late Cenozoic landscape evolution in central Costa Rica, and describes the history of volcanic arc retreat related to shallowing of subduction.


Chapter 3 investigates the tectonic geomorphology of the Costa Rican coastal forearc, and develops a correlation framework for uplifted Quaternary marine and fluvial terraces along the southern Middle America margin.     




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