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Articles 1 - 5 of 5
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Los Morteros: Early Monumentality And Environmental Change In The Lower Chao Valley, Northern Peruvian Coast, Ana Cecilia Mauricio Llonto
Los Morteros: Early Monumentality And Environmental Change In The Lower Chao Valley, Northern Peruvian Coast, Ana Cecilia Mauricio Llonto
Electronic Theses and Dissertations
This doctoral dissertation presents the results of archaeological and geoarchaeological studies carried out at the site of Los Morteros and the Archaeological Complex of Pampa de las Salinas, lower Chao Valley, North Coast of Peru, between September 2012 and July 2014. This research focuses on the study of the mound-shaped site of Los Morteros and the environmental contexts in which this site developed. Previous excavations at the site considered Los Morteros as a “stabilized dune” whose top was used as cemetery for pre-pottery people around cal. 5000 B.P (Cardenas 1995, 1999). However, geo-radar explorations of the mound in 2006 and …
Fluvial Deposition, El Nino And Landscape Construction In Northern Coastal Peru, Paul M. Pluta
Fluvial Deposition, El Nino And Landscape Construction In Northern Coastal Peru, Paul M. Pluta
Electronic Theses and Dissertations
The El Nino global climate anomaly is a major cause of weather variation that can have far-reaching effects on human populations around the world. Northern coastal Peru is an area of historically major impacts where strong El Nino events have resulted in catastrophic flooding and mass wasting, leading to significant social disruption. There is a growing body of literature on the prehistoric chronology of El Nino and how it affected human populations of the past, but more work is needed. In order to address the timing and characteristics of past El Nino events I investigated the alluvial sedimentary sequences at …
Reconstructing Late Holocene Hydrographic Variability Of The Gulf Of Maine, Nina Millicent Whitney
Reconstructing Late Holocene Hydrographic Variability Of The Gulf Of Maine, Nina Millicent Whitney
Electronic Theses and Dissertations
I present an annually resolved reconstruction of seawater temperatures in the
western North Atlantic from 1695-1915. This paleoclimate record was constructed
using oxygen isotopes measured in precisely dated Arctica islandica shells collected
off of Seguin Island in the western Gulf of Maine. The temperature reconstruction
was derived from this oxygen isotope time series using a modern d18Ow-salinity
mixing line developed for coastal waters in the Gulf of Maine from water samples
collected over the last decade. The d18Ow and salinity composition of these water
samples indicate that coastal surface waters consist of a …
Temperature As A Proxy To Study The Flow Of Water Within Two Maine Streambeds, Jarrod D. Cicha
Temperature As A Proxy To Study The Flow Of Water Within Two Maine Streambeds, Jarrod D. Cicha
Electronic Theses and Dissertations
Heat transport studies often focus on calculating an average direction and magnitude of groundwater flow within the streambed for long (3 days – 1 week) periods of time. Short-term changes in flow magnitude and/or direction within the streambed caused by near stream groundwater pumping and storms are not represented by these long term averaging methods. Temperature profiles collected in B Stream (Houlton, Maine) and the Stillwater River (Orono, Maine) were used to calibrate a one-dimensional heat transport model and quantify short-term hydraulic events in vertical groundwater velocity within streambeds. Temperature profiles were collected during the summer of 2014 with iButton …
Topographic Signatures Of Geodynamics, Samuel G. Roy
Topographic Signatures Of Geodynamics, Samuel G. Roy
Electronic Theses and Dissertations
The surface of the Earth retains an imperfect memory of the diverse geodynamic, climatic, and surface transport processes that cooperatively drive the evolution of Earth. In this thesis I explore the potential of using topographic analysis and landscape evolution models to unlock past and/or present evidence for geodynamic activity. I explore the potential isolated effects of geodynamics on landscape evolution, particularly focusing on two byproducts of tectonic strain: rock displacement and damage. Field evidence supports a strong correlation between rock damage and erodibility, and a numerical sensitivity analysis supports the hypothesis that an order of magnitude weakening in rock, well …