Dr. Jeff Marshall’s Research


 

Nicoya Peninsula, Costa Rica

    Fore arc morphotectonics along the Nicoya Peninsula seismogenic zone, Costa Rica

 

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Funding from:   National Science Foundation MARGINS Program  (Seismogenic Zone Experiment - SEIZE)

W.K. Kellogg Foundation  (Cal Poly Pomona R.S.C.A. & Kellogg FuTURE Programs)

Keck Geology Consortium  (2013-14 Undergraduate Research Field Projects)

 

 

 

 

Digital elevation model of southern Central America, showing NASA-SRTM topography for Nicaragua and Costa Rica linked to offshore IFM-GEOMAR multi-beam bathymetry (courtesy of C. Ranero, ICM-CSIC, Barcelona). This image reveals the relationship between the morphology of the subducting Cocos Plate and the morphotectonic structure of the overriding fore arc and volcnic arc of the Caribbean Plate and Panama block. Two segment boundaries on the subducting Cocos Plate intersect the margin offshore of the Nicoya Peninsula: 1) a morphologic break between smooth and rough sea floor domains, and 2) a fracture zone trace that divides crust formed at the East Pacific Rise (EPR) from that formed at the Cocos-Nazca spreading center (CNS-1 and CNS-2).

a) DEM of Nicoya Peninsula (NASA-SRTM) showing uplifted marine and fluvial terraces within late Pleistocene Iguanazul, Carrillo, Cobano, and La Mansion geomorphic surfaces (red areas); and Holocene Garza and Cabuya surfaces (yellow areas). Rectangles outline coastal study areas. Dashed white lines mark structural lineaments bounding 8 mountain blocks (A-G) with varying topographic relief (Hare and Gardner, 1985). b): Map showing rupture area for 1950 M7.7 Nicoya earthquake (Guendel, 1986) and model for present day locked zone based on GPS velocity field (Norabuena et al, 2004). Note coincidence of earthquake rupture zone, locked patch, and area of prominent topographic relief extending from blocks C to F. c): Schematic of terrace elevations, age data, and uplift rates for numbered study sites (see DEM for locations). Terrace ages based on isotopic dates (TCN, OSL, 14C) and sea level curve correlations. Red dashed lines mark EPR, CNS-1, and CNS-2 segment boundaries. White dashed lines mark boundaries of blocks A-G. The most rapid uplift affects block G inboard of subducting Fisher seamount. Otherwise, rapid uplift affects blocks C-E inboard of locked patch and 1950 rupture. Abrupt decrease in uplift rate NW of locked zone (between blocks B&C) suggests NW end of peninsula may lie within a distinct segment of the plate margin.

 


 

Project Overview:

Dr. Jeff Marshalls Nicoya Peninsula Research

Megathrust earthquakes, coastal uplift, and emergent marine terraces of Costa Rica’s Nicoya Peninsula  [Web Site]

(in Bierman, P., and Montgomery, D., eds., 2008, Key Concepts in Geomorphology, Online Research Vignettes)

 

Research Highlights:

2012 Nicoya Earthquake (Mw 7.6)  Breaking News!

NSF Nicoya Earthquake Rapid Response Team  [Web Site]

 

NSF GeoPRISMS Newsletter Article  (Spring 2011, Issue No. 26)

Marshall and Spotila Nicoya Peninsula Research Field Blog  [PDF file: 1.1 Mb]

 

Research Poster  (Spring 2012, Seismological Society of America Meeting, San Diego, CA)

Morphotectonic segmentation along the Nicoya Peninsula seismic gap, Costa Rica, Central America  [PDF file: 12.3 Mb]

 

Images: 

Project photos and illustrations

 

Reading List: 

Nicoya Peninsula Research Bibliography

 

Project Students:

Graduate Students

Shawn Morrish

Eli LaFromboise

Undergraduate Researchers

2010-present                             Amber Butcher                           2006-2008

Andrew Barnhart                         Brent Ritzinger                            Eli LaFromboise                   

Michael Landeros                        Kacie Wellington                         John Utick              

Lilibeth Wenceslao                      2008-2010                                  2004-2006   

Jazmín González                         Shawn Morrish                            Fookgin Khaw

Susana Lino                               Reynicole Gilbert                        Lauren Annis

Kelly Kinder                               Peter Piestrzeniewicz                   Julie Parra  

 

Research Abstracts:

2013 AGU-MOA Abstract: American Geophysical Union Meeting of the Americas, Cancún, México, 2013

2012 AGU Fall Meeting Abstract: American Geophysical Union Fall Meeting, San Francisco, California, 2012

2012 SSA Annual Meeting Abstract: Seismological Society of America Annual Meeting, San Diego, California, 2012

2011 AGU Fall Meeting Abstract: American Geophysical Union Fall Meeting, San Francisco, California, 2011

2011 ICTP Workshop Abstract: ICTP/TWAS Workshop on Seismic Sources in Central America, Heredia, Costa Rica, 2011

2011 NSF GeoPRISMS Workshop Abstract: NSF GeoPRISMS Subduction Cycles & Deformation Workshop, Bastrop, Texas, 2011

2010 AGU Fall Meeting Abstract: American Geophysical Union Fall Meeting, San Francisco, California, 2010

2010 GSA Annual Meeting Abstract: Geological Society of America Annual Meeting, Denver, Colorado, 2010

2010 GSA Cordilleran Meeting Abstract (1): Geological Society of America Cordilleran Section Meeting, Anaheim, California, 2010

2010 GSA Cordilleran Meeting Abstract (2): Geological Society of America Cordilleran Section Meeting, Anaheim, California, 2010

2009 GSA Annual Meeting Abstract (1): Geological Society of America Annual Meeting, Portland, Oregon, 2009

2009 GSA Annual Meeting Abstract (2): Geological Society of America Annual Meeting, Portland, Oregon, 2009

2008 GSA Annual Meeting Abstract: Geological Society of America Annual Meeting, Houston, Texas, 2008

2008 NSF MARGINS SEIZE Workshop Abstract: NSF MARGINS SEIZE Workshop, Mt. Hood, Oregon, 2008

2008 Central American Geologic Congress Abstract: IX Congreso Geológico de América Central, San José, Costa Rica, 2008

2007 AGU Fall Meeting Abstract: American Geophysical Union Fall Meeting, San Francisco, California, 2007

2007 NSF MARGINS Meeting Abstract: NSF MARGINS Central America Focus Site Meeting, Heredia, Costa Rica, 2007

2006 GSA Cordilleran Meeting Abstract (1): Geological Society of America Cordilleran Section Meeting, Anchorage, Alaska, 2006

2006 GSA Cordilleran Meeting Abstract (2): Geological Society of America Cordilleran Section Meeting, Anchorage, Alaska, 2006

2005 GSA Annual Meeting Abstract: Geological Society of America Annual Meeting, Salt Lake City, Utah, 2005

2004 AGU Fall Meeting Abstract: American Geophysical Union Fall Meeting, San Francisco, California, 2004

2004 GSA Cordilleran Meeting Abstract: Geological Society of America Cordilleran Section Meeting, Boise, Idaho, 2004

2003 GSA Annual Meeting Abstract: Geological Society of America Annual Meeting, Seattle, Washington, 2003

 

Related Publications:

Marshall, J.S., and Morrish, S.C., 2013 (in prep), Coseismic coastal uplift from the 2012 Mw7.6 Nicoya Earthquake, Costa Rica: Seismological Society of America Bulletin.

[Manuscript in preparation]

Spotila, J.A., Marshall, J.S., DePew, K., and Prince, P., 2013 (in prep), Feasibility of a paleoseismic record of megathrust rupture along the Nicoya Peninsula, Costa Rica: Seismological Society of America Bulletin.

[Manuscript in preparation]

Marshall, J., Morrish, S., LaFromboise, E., Butcher, A., Ritzinger, B., Wellington, K., Barnhart, A., Kinder, K., Utick, J., Protti, M., Gardner, T., Fisher, D., Simila, G., Spotila, J., Owen, L., Murari, M., and Cupper, M., 2013 (in prep), Morphotectonic segmentation along the Nicoya Peninsula seismogenic zone, Costa Rica, Central America: Geological Society of America Bulletin.

[Manuscript in preparation]  Poster with preliminary results - [PDF file: 12.3 Mb]

Dixon, T., Schwartz, S., Protti, M., González, V., Newman, A., Marshall, J., and Spotila, J., 2012, Research Opportunity: Geodetic, Geomorphic, and Seismic Data Available for the September 5, 2012 MW 7.6 Nicoya Earthquake, Costa Rica, a Direct Hit on a MARGINS Seismogenic Zone Experiment (SEIZE) Focus Site: Eos, Transactions American Geophysical Union.

[Manuscript in preparation]

Marshall, J., and Spotila, J., 2011, Piedras de fuego and the trembling serpent of Nicoya: On the hunt for ancient shorelines and megathrust earthquakes, Nicoya Peninsula, Costa Rica: NSF GeoPRISMS Newsletter, No. 26, Spring 2011, p. 33-36.

[PDF file: 1.1 Mb]

Marshall, J.S., Gardner, T.W., Protti, M., and Nourse, J.A., 2009, International geosciences field research with undergraduate students: Three models for experiential learning projects investigating active tectonics of the Nicoya Peninsula, Costa Rica, in Whitmeyer, S.J., Mogk, D.W., and Pyle, E.J., eds., Field Geology Education: Historical Perspectives and Modern Approaches: Geological Society of America Special Paper 461, p. 77-98, doi: 10.1130/2009.2461(08).

[PDF file: 1.6 Mb]

Sak, P.B., Fisher, D.M., Gardner, T.W., Marshall, J.S., and Lafemina, P., 2009, Rough crust subduction, forearc kinematics, and Quaternary uplift rates, Costa Rican segment of the Middle American Trench: Geological Society of America Bulletin, v. 121, no. 7/8, p. 992-1012, doi: 10.1130/B26237.1.

[PDF file: 2.2 Mb]

Marshall, J.S., 2008, Megathrust earthquakes, coastal uplift, and emergent marine terraces of Costa Rica’s Nicoya Peninsula, in Bierman, P. and Montgomery, D., eds., Key Concepts in Geomorphology - Vignettes, [online supplement]: On the Cutting Edge Program, Science Education Resource Center (SERC), Carleton College, Northfield, Minnesota.

[Web Link] or [PDF file: 556 kb]

Marshall, J.S., Gardner, T.W., Fisher, D.M., Sak, P.B., and Protti, M., 2001, Quaternary neotectonics of the Costa Rican coastal fore arc: Field Guide for the National Science Foundation MARGINS Program Workshop on Central American Tectonics (SEIZE & SubFac Initiatives), Heredia, Costa Rica, July 2001, 62 p.

[PDF file: 8.1 Mb]

Gardner, T.W., Marshall, J.S., Merritts, D.J., Protti, M., Bee, B., Burgette, R., Burton, E., Cooke, J., Kehrwald, N., Fisher, D., and Sak, P., 2001, Holocene fore arc block rotation in response to seamount subduction, southeastern Península de Nicoya, Costa Rica: Geology, v. 29, p. 151-154.

[PDF file: 284 kb]

Marshall, J.S., and Anderson, R.S., 1995, Quaternary uplift and seismic cycle deformation, Península de Nicoya, Costa Rica: Geological Society of America Bulletin, v. 107, p. 463-473.

[PDF file: 500 kb]

 


 

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