Grand Canyon Dams, Split-Twig Figurines, and “Hit-and-Run” Archaeology

1968 ◽  
Vol 33 (3) ◽  
pp. 341-351 ◽  
Author(s):  
Stephen C. Jett

AbstractIn 1966 and 1967, amateurs unearthed a number of split-twig figurines in Stanton Cave in the Grand Canyon’s Marble Gorge. A number of these figurines are described, including one which is perhaps the finest ever discovered. It is documented that these finds by amateurs were stimulated by publication about this site in popular periodicals. It is also argued, using the Grand Canyon as an example, that survey and salvage in connection with large dam construction is never a substitute for long-range study of the archaeology and its environmental context, and that salvage cannot be considered as a benefit justifying dam construction but only as an alleviation of some of the dam damage.

2011 ◽  
Vol 66 (4) ◽  
pp. 523-529 ◽  
Author(s):  
Teimuraz Matcharashvili ◽  
Tamaz Chelidze ◽  
Vakhtang Abashidze ◽  
Natalia Zhukova ◽  
Ekaterine Mepharidze ◽  
...  

1976 ◽  
Vol 69 (3) ◽  
pp. 336-337
Author(s):  
David L. Trupin ◽  
E.Peter Prezzano ◽  
Robert J. Weakley ◽  
William T. Fisher ◽  
Jerald L. Merritt ◽  
...  

2019 ◽  
Vol 44 (8) ◽  
pp. 871-885
Author(s):  
Carlos Enrique Tupiño Salinas ◽  
Vládia Pinto Vidal de Oliveira ◽  
Liana Brito ◽  
André V. Ferreira ◽  
José Carlos de Araújo

2008 ◽  
Vol 609 ◽  
pp. 319-347 ◽  
Author(s):  
IAN S. SULLIVAN ◽  
JOSEPH J. NIEMELA ◽  
ROBERT E. HERSHBERGER ◽  
DIOGO BOLSTER ◽  
RUSSELL J. DONNELLY

As part of a long-range study of vortex rings, their dynamics, interactions with boundaries and with each other, we present the results of experiments on thin core rings generated by a piston gun in water. We characterize the dynamics of these rings by means of the traditional equations for such rings in an inviscid fluid suitably modifying them to be applicable to a viscous fluid. We develop expressions for the radius, core size, circulation and bubble dimensions of these rings. We report the direct measurement of the impulse of a vortex ring by means of a physical pendulum.


1961 ◽  
Vol 241 (1) ◽  
pp. 18-21 ◽  
Author(s):  
George A. Perera ◽  
E. Gurney Clark ◽  
Frances R. Gearing ◽  
Morton D. Schweitzer

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