• Origin and Application of the Twinned Calcite Strain Gauge 

  Groshong, Richard H., Jr. (2021)

  This paper is a personal account of the origin and development of the twinned-calcite strain gauge, its experimental verification, and its relationship to stress analysis. The method allows the calculation of the ...
• Fundamental Questions and Applications of Sclerochronolgy: Community-defined Research Priorities 

  Troftmova, Tamara; Andrus, C. Fred T.; et al. (2020)

  Horizon scanning is an increasingly common strategy to identify key research needs and frame future agendas in science. Here, we present the results of the first such exercise for the field of sclerochronology, thereby ...
• δ15N Values in Crassostrea Virginica Shells Provides Earliest Direct Evidence for Nitrogen Loading to Chesapeake Bay 

  Black, H. D.; Andrus, C. Fred T.; Lambert, W. J.; Rick, T. C.; Gillikin, D. P. (2017-03-10)

  Crassostrea virginica is one of the most common estuarine bivalves in the United States’ east coast and is frequently found in archaeological sites and sub-fossil deposits. Although there have been several sclerochronological ...
• Sclerochronological Measures of Seasonality at a Late Woodland Mound on the Mississippi Gulf Coast 

  Blitz, John H.; Andrus, C. Fred T.; Downs, Lauren E. (2014-10)

  Seasonality of site occupation has been an important issue in the archaeology of precolumbian coastal populations in the U.S. Southeast. Sclerochronological oxygen isotope measurements to estimate season of capture were ...
• Seasonal Shell Growth and Longevity in Donax Variabilis from Northeastern Florida: Evidence from Oxygen Isotopes 

  Jones, Douglas S.; Quitmyer, Irvy R.; Andrus, C. Fred T. (2004)

  The variable coquina clam, Donax variabilis, is one of the most common inhabitants of exposed sandy beach intertidal and shallow subtidal zones in the southeastern United States. Its exceptional burrowing and migratory ...
• El Niño Impact on Mollusk Biomineralization– Implications for Trace Element Proxy Reconstructions and the Paleo-Archeological Record 

  Pérez-Huerta, Alberto; Etayo-Cadavid, Miguel F.; Andrus, C. Fred T.; Jeffries, Teresa E.; Watkins, Clifton; Street, Shane C.; Sandweiss, Daniel H. (2013-02-06)

  Marine macroinvertebrates are ideal sentinel organisms to monitor rapid environmental changes associated with climatic phenomena. These organisms build up protective exoskeletons incrementally by biologically-controlled ...
• Oxygen Isotope Record of the 1997–1998 El Niño in Peruvian Sea Catfish (Galeichthys peruvianus) Otoliths 

  Andrus, C. Fred T.; Crowe, Douglas E.; Romanek, Christopher S. (2002-10-11)

  Sagittal otoliths of the Peruvian sea catfish Galeichthys peruvianus were collected from the north coast of Peru during and after the 1997–1998 El Niño. The otoliths were analyzed via laser microprobe and micromilling ...
• Evaluating Mobility, Monumentality, and Feasting at the Sapelo Island Shell Ring Complex 

  Thompson, Victor D.; Andrus, C. Fred T. (2011)

  wo of the most salient anthropological questions regarding southeastern shell ring sites are related to the season(s) that they were occupied and whether or not the deposits represent monumental constructions and/or feasting ...
• Vital Effects in the Context of Biomineralization 

  Pérez-Huerta, Alberto; Andrus, C. Fred T. (2010)

  Vital effects can be defined as biological processes overriding environmental signals, as recorded in geochemical signatures in biominerals. The nature and influence of these vital effects are poorly understood, particularly ...
• Crustal Structure beneath the Northern Transantarctic Mountains and Wilkes Subglacial Basin: Implications for Tectonic Origins 

  Hansen, Samantha E.; Kenyon, Lindsey M.; Graw, Jordan H.; Park, Yongcheol; Nyblade, Andrew A. (2016-02-13)

  Key Points: New crustal constraints beneath the northern Transantarctic Mountains (TAMs). Crust thickens from ~20 km near the coast to ~41 km inland. Locally thicker crust may explain additional topography in the ...
• Crustal and Upper-Mantle Structure Beneath Ice-Covered Regions in Antarctica from S-wave Receiver Functions and Implications for Heat Flow 

  Ramirez, C.; Nyblade, A.; Hansen, S. E.; Wiens, D. A.; Anandakrishnan, S.; Aster, R. C.; Huerta, A. D.; Shore, P.; Wilson, T. (2016)

  S-wave receiver functions (SRFs) are used to investigate crustal and upper-mantle structure beneath several ice-covered areas of Antarctica. Moho S-to-P (Sp) arrivals are observed at ∼6–8 s in SRF stacks for stations in ...
• Investigating the P Wave Velocity Structure beneath Harrat Lunayyir, Northwestern Saudi Arabia, using Double-Difference Tomography and Earthquakes from the 2009 Seismic Swarm 

  Hansen, Samantha E.; DeShon, Heather R.; Moore-Driskell, Melissa M.; Al-Amri, Abdullah M. S. (2013-09-12)

  In 2009, a swarm of more than 30,000 earthquakes occurred beneath the Harrat Lunayyir lava field in northwest Saudi Arabia. This event was just one of several seismic swarms to occur in this region over the past decade. ...
• Upper Mantle Seismic Anisotropy beneath the Northern Transantarctic Mountains, Antarctica from PKS, SKS, and SKKS Splitting Analysis 

  Graw, Jordan H.; Hansen, Samantha E. (2017-02-12)

  Using data from the new Transantarctic Mountains Northern Network, this study aims to constrain azimuthal anisotropy beneath a previously unexplored portion of the Transantarctic Mountains (TAMs) to assess both past and ...
• Rayleigh Wave Constraints on the Structure and Tectonic History of the Gamburtsev Subglacial Mountains, East Antarctica 

  Heeszel, David S.; Wiens, Douglas A.; Nyblade, Andrew A.; Hansen, Samantha E.; Kanao, Masaki; An, Meijan; Zhao, Yue (2013-05-10)

  The Gamburtsev Subglacial Mountains (GSM), located near the center of East Antarctica, remain one of the most enigmatic mountain ranges on Earth. A lack of direct geologic samples renders their tectonic history almost ...
• Upper Mantle Seismic Structure beneath Central East Antarctica from Body Wave Tomography: Implications for the Origin of the Gamburtsev Subglacial Mountains 

  Lloyd, Andrew J.; Nyblade, Andrew A.; Wiens, Douglas A.; Shore, Patrick J.; Hansen, Samantha E.; Kanao, Masaki; Zhao, Dapeng (2013-04-17)
• Using S Wave Receiver Functions to Estimate Crustal Structure Beneath Ice Sheets: An Application to the Transantarctic Mountains and East Antarctic Craton 

  Hansen, Samantha E.; Julià, Jordi; Nyblade, Andrew A.; Pyle, Moira L.; Wiens, Douglas A.; Anandakrishnan, Sridhar (2009)

  For seismic stations deployed on ice sheets, determining crustal structure using P wave receiver functions can be difficult since ice reverberations may mask P-to-S (Ps) conversions from the crust-mantle boundary (Moho). ...
• Upper-Mantle Low-Velocity Zone Structure beneath the Kaapvaal Craton from S-Wave Receiver Functions 

  Hansen, Samantha E.; Nyblade, Andrew A.; Julià, Jordi; Dirks, Paul H. G. M.; Durrheim, Raymond J. (2009)

  The southern African Plateau is marked by anomalously high elevations, reaching 1–2 km above sea level, and there is much debate as to whether this topography is compensated by a lower mantle source or by elevated ...
• Seismic Velocity Structure and Depth-Dependence of Anisotropy in the Red Sea and Arabian Shield from Surface Wave Analysis 

  Hansen, Samantha E.; Gaherty, James B.; Schwartz, Susan Y.; Rodgers, Arthur J.; Al-Amri, Abdullah M. S. (2008-10-14)

  We investigate the lithospheric and upper mantle shear wave velocity structure and the depth-dependence of anisotropy along the Red Sea and beneath the Arabian Peninsula using receiver function constraints and phase ...
• Hydrologic response to precipitation pulses under and between shrubs in the Chihuahuan Desert, Arizona 

  Moran, M. S.; Hamerlynck, E. P.; Scott, R. L.; Stone, J. J.; Holifield Collins, C. D.; Keefer, T. O.; Bryant, R.; DeYoung, L.; Nearing, G. S.; Sugg, Z.; Hymer, D. C. (2010-10-08)

  Observations of the temporal and spatial distribution of poststorm soil moisture in open shrublands and savannas are limited, yet they are critical to understanding the interaction and feedback between moisture distribution ...
• Assimilating remote sensing observations of leaf area index and soil moisture for wheat yield estimates: an observing system simulation experiment 

  Nearing, G. S.; Crow, W. T.; Thorp, K. R.; Moran, M. S.; Reichle, R. H.; Gupta, H. V. (2012-05-17)

  Observing system simulation experiments were used to investigate ensemble Bayesian state‐updating data assimilation of observations of leaf area index (LAI) and soil moisture (θ) for the purpose of improving single‐season ...

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