OREGON STATE UNIVERSITY
Geomorphology Brown Bag - Winter 2014
Tuesday 12-1 PM in Wilkinson 203
Sedimentation at the Plio-Pleistocene

 

Is there a Pliocene-Pleistocene increase in sediment flux from continents to the oceans? Why or why not? The data is in the stratigraphic record, but the why is in the geomorphology. We will begin with an overview then you can pick from these suggestions or offer up your own:

The What:
Zhang et al., 2001 - Nature (sedimentologic "evidence" for a global increase in sediment accumulation rates)
Molnar, 2004 - Annual Reviews (develops idea in Zhang in detail)
Willett, 2010 - Annual Reviews (climate driver of increased erosion in Alps)
Willenbring and von Blanckenburg, 2010 - Nature (counter argument for NO increase in erosion)
Herman et al., 2013 - Nature (just published last week - again arguing for an increase, from a different data set)

The Why:
Molnar, 2001 - Geology (argument for climate, discharge variability and erosion rates)
Lague et al., 2005 - JGR, ES (how discharge variability drives changes in fluvial incision)
Molnar et al., 2006 - JGR, ES (reevaluation of flood statistics and sediment transport)
DiBiasi and Whipple, 2011 - JGR, ES (case study of how to link discharge variability and erosion rates)

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Date Presenter Topic
Jan 7 2014

Andrew

 

Introduction - Church papers.

 

Church_1972_Paraglacial.pdf, Church_1989_Holocene Paraglacialpdf.pdf
Jan 14 2014

Laura

 

Increased sedimentation rates and grain sizes 2–4 Myr ago due to the influence of climate change on erosion rates

Late Cenozoic increase in accumulation rates of terrestrial sediment: how might climate change have affected erosion rates?

 

Zhang et al., 2001.pdf, Molnar, 2004.pdf
Jan 21 2014

Eric

 

Long-term stability of global erosion rates and weathering during late-Cenozoic cooling

 

2010_Willenbring&vonBlackenburg_Nature.pdf
Jan 28 2014

Eric

 

Tectonic forcing of late Cenozoic climate

 

Raymo_1992_Nature.pdf
Feb 4 2014

Group

 

Late Neogene Erosion of the Alps: A Climate Driver?

 

2010_Willet_AnnualReviews.pdf
Feb 18 2014

Lalo

 

Dating Fluvial Terraces with 10Be and Al26 profiles: application to the Wind River, Wyoming

 

1999_Hancocketal_geomorph.pdf
Feb 25 2014

Caroline

 

Discharge, discharge variability, and the bedrock channel profile

 

Lague_2005.pdf
Mar 4 2014

Lalo

 

Numerical modeling of fluvial strath-terrace formation in response to oscillating climate

 

2002 Hancock.pdf
Mar 11 2014

Eric & Andrew

 

A signature of transience in bedrock river incision rates over timescales of 104-107 years

Worldwide acceleration of mountain erosion under a cooling climate - link to article

Herman et al., 2012 News&Views

Finnegan_2014_River incision timesacle.pdf, hermann_etal_2013_NEWS_VIEWS.pdf