Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Amy L. Ellwein"'
Publikováno v:
Geosciences, Vol 8, Iss 5, p 146 (2018)
The Moenkopi dune field in northeastern Arizona covers roughly 1250 km2, but most of the field is inactive. Dune deposits on the Moenkopi Plateau (MP) have remained inactive throughout the Holocene despite periods of elevated aridity or historical re
Externí odkaz:
https://doaj.org/article/fbe6f538955c429dafbde0a13a84acd1
Publikováno v:
Geological Society of America Abstracts with Programs.
Publikováno v:
Geological Society of America Abstracts with Programs.
Publikováno v:
Quaternary International. 362:87-107
Detailed geomorphic mapping and analysis of soil-stratigraphy and optically stimulated luminescence (OSL) dating of eolian sand dunes on Black Mesa, Arizona, reveal eolian sediment deposition occurred from 30 to 16 ka, followed by a period of widespr
Publikováno v:
Journal of Geoscience Education. 62:578-586
Authentic scientific data, when richly contextualized, can provide the basis for compelling learning experiences. Many undergraduate students either do not have access to primary data, or if they do, the data are so abstract that student engagement i
Autor:
Allen C. Gellis, R. Viger, Milan J. Pavich, Michael E. Wieczorek, I. Clark, S. Aby, Amy L. Ellwein
Publikováno v:
Geological Society of America Bulletin. 124:817-841
Arroyos in the American Southwest proceed through cut-and-fill cycles that operate at centennial to millennial time scales. The geomorphic community has put much effort into understanding the causes of arroyo cutting in the late Quaternary and in the
Publikováno v:
Quaternary Research. 75:395-398
Eolian deposition on the semiarid southern Colorado Plateau has been attributed to episodic aridity during the Quaternary Period. However, OSL ages from three topographically controlled (e.g. falling) dunes on Black Mesa in northeastern Arizona indic
Autor:
Kirsten M. Menking, Nathaniel A. Brunsell, Steven W. Hostetler, Thomas A Loveland, Roger Y. Anderson, Amy L. Ellwein, Bruce D. Allen
Publikováno v:
Global and Planetary Change. 25:133-147
Bowen ratio meteorological stations have been deployed to measure rates of evaporation from groundwater discharge playas and from an adjacent vegetated bench in the Estancia Basin, in central New Mexico. The playas are remnants of late Pleistocene pl
Publikováno v:
Eos, Transactions American Geophysical Union. 89:514-514
An increasing number of geoscience departments are recognizing the need to assume a larger role in facets of public education. The role of geoscience departments in the preparation and professional development of K-12 science teachers is particularly
Autor:
Louis A. Scuderi, Tim F. Wawrzyniec, L. D. McFadden, Amy L. Ellwein, Peter J. Fawcett, Joe McAuliffe, Grant A. Meyer
Publikováno v:
Geosphere. 3:550
The advent of high-resolution, precise, back-pack portable terrestrial lidar scanners (TLS) provides a revolutionary new tool for obtaining quantitative, high-resolution (2-mm to 30-mm point spacing) measurements of landscape surface features. Moreov