@conference {1571, title = {Assessing environmental factors associated with changes in the growth rate of a bivalve mollusk species through the Holocene}, booktitle = {First International Sclerochronology Conference}, year = {2007}, note = {id: 1169}, month = {2007}, address = {St. Petersburg, FL USA}, author = {Krause R.A, Jr. and Huntley, J. W. and Kowalewski, M. and Romanek, C. R. and Kaufmann, D. S. and Simoes, M. G.} } @article {946, title = {Age mixing among sympatrick bivalves and brachiopods from the Brazilian South Atlantic}, journal = {Geological Society of America Abstracts with Programs}, volume = {38}, year = {2006}, note = {id: 1170}, pages = {443}, author = {Krause R.A, Jr. and Barbour-Wood, S. and Kowalewski, M. and Simoes, M. G. and Kaufman, D. and Romanek, C. S. and Wehmiller, J. R.} } @article {1015, title = {Aspartic acid racemization dating of Holocene brachiopods and bivalves from the southern Brazilian shelf, South Atlantic}, journal = {Quaternary Research}, volume = {66}, year = {2006}, note = {id: 1168}, pages = {323-331}, abstract = {The extent of racemization of aspartic acid (Asp) has been used to estimate the ages of 9 shells of the epifaunal calcitic brachiopod Bouchardia rosea and 9 shells of the infaunal aragonitic bivalve Semele casali. Both taxa were collected concurrently from the same sites at depths of 10 m and 30 m off the coast of Brazil. Asp D/L values show an excellent correlation with radiocarbon age at both sites and for both taxa (r2Site 9 B. rosea = 0.97, r2Site 1 B. rosea = 0.997, r2Site 9 S. casali = 0.9998, r2Site 1 S. casali = 0.93). The Asp ratios plotted against reservoir-corrected AMS radiocarbon ages over the time span of multiple millennia can thus be used to develop reliable and precise geochronologies not only for aragonitic mollusks (widely used for dating previously), but also for calcitic brachiopods. At each collection site, Bouchardia specimens display consistently higher D/L values than specimens of Semele. Thermal differences between sites are also notable and in agreement with theoretical expectations, as extents of racemization for both taxa are greater at the warmer, shallower site than at the cooler, deeper one. In late Holocene marine settings, concurrent time series of aragonitic and calcitic shells can be assembled using Asp racemization dating, and parallel multi-centennial to multi-millennial records can be developed simultaneously for multiple biomineral systems.}, keywords = {Amino acid racemization, Aspartic, Bouchardia, Brachiopods, Brazil, Holocene, Mollusks, Radiocarbon dating, Semele, Ubatuba Bay}, doi = {10.1016/j.yqres.2006.04.001}, author = {Barbour-Wood, S. L. and Krause R.A, Jr. and Kowalewski, M. and Wehmiller, J. F. and Simoes, M. G.} } @conference {1632, title = {Evaluating the Holocene c=dynamics of oceanographic processes in the Southeast Brazilian Bight using accumulations of calcitic and aragonitic shells}, booktitle = {American Geophysical Union, Fall Meeting}, year = {2006}, note = {id: 716}, month = {2006}, address = {San Francisco, CA, USA}, abstract = {PP43A-01233}, author = {Krause R.A, Jr. and Barbour-Wood, S. and Kowalewski, M. and Simoes, M. G. and Kaufman, D. and Romanek, C. S. and Wehmiller, J. F.} } @conference {1650, title = {Holocene terebratulid brachiopods from the southern Brazilian Shelf (South Atlantic): Ecology, taphonomy, and time-averaging}, booktitle = {Fifth International Brachiopod Congress}, year = {2005}, note = {id: 1171; Abstracts, p. 34-35}, month = {2005}, publisher = {Harper, D. A. T. Long, S. L. McCorrey, M.}, organization = {Harper, D. A. T. Long, S. L. McCorrey, M.}, address = {Copenhagen}, author = {Kowalewski, M. and Simoes, M. G. and Barbour-Wood, S. L. and Krause R.A, Jr. and Rodriguez, S. C. and Wehmiller, J. F. and Rodland, D. L. and Carroll, M.} } @conference {1590, title = {A comparative analysis of time averaging for bivalves and brachiopods from a modern tropical shelf}, booktitle = {Geological Society of America, Abstracts with Programs}, year = {2004}, note = {id: 718}, month = {2004}, address = {Denver, CO, USA}, abstract = {36(5):383}, author = {Krause R.A, Jr. and Barbourl-Wood, S. L. and Wehmiller, J. F. and Kowalewski, M. and Simoes, M. G.} } @conference {1809, title = {Time averaging on a shallow subtropical shelf: the search for a taphomomic clock}, booktitle = {Geological Society of America, Abstracts with Programs}, year = {2004}, note = {id: 719}, month = {2004}, address = {Washington, DC, USA}, abstract = {36(2):134}, author = {Barbour-Wood, S. L. and Krause R.A, Jr. and Kowalewski, M. and Wehmiller, J. F. and Simoes, M. G.} } @conference {1593, title = {A comparison of rates of time averaging between the bivalve Macoma cleryana and brachiopod Bouchardia rosea on a shallow subtropical shelf}, booktitle = {Geological Society of America, Abstracts with Programs}, year = {2003}, note = {id: 720}, month = {2003}, address = {Seattle, WA, USA}, abstract = {35(6):273}, author = {Barbour-Wood, S. L. and Krause R.A, Jr. and Kowalewski, M. and Wehmiller, J. F. and Simoes, M. G. and Goodfriend, G. A.} }