Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Alan F. Halfen"'
Autor:
Joel Roskin, Sallie Burrough, Xiaoping Yang, Charlie S. Bristow, Stephen A. Wolfe, Paul Hesse, David S.G. Thomas, Marcelo Zárate, Haim Tsoar, Alfonsina Tripaldi, Olaf Bubenzer, Ashok K. Singhvi, Geoff A. T. Duller, Nicholas Lancaster, Alan F. Halfen
The INQUA Dunes Atlas project has developed a global digital database of chronological information for periods of inland or continental sand dune accumulation and stabilization. The database comprises information on the site location (including coord
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::867648bf34cc0cc645d76df3b6a1d45b
https://doi.org/10.1016/j.quaint.2015.10.044
https://doi.org/10.1016/j.quaint.2015.10.044
Autor:
William C. Johnson, Joseph A. Mason, Paul R. Hanson, Joel Q.G. Spencer, Alan F. Halfen, Aaron R. Young
Publikováno v:
Aeolian Research. 36:68-81
Extensive luminescence and 14C dating of aeolian sand dunes and sheets in the Central Great Plains (CGP) have been biased toward the western part of the region, targeted relatively large dune fields, and produced primarily Holocene (Marine Isotope St
Publikováno v:
Dunes of the World ISBN: 9783030404970
An often-windy landscape with few major topographic features, poorly consolidated fine-grained geology, and limited and variable precipitation has endowed the Central and Southern Great Plains with the ideal environment for development and repeated r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::03b1e1bc58ea72f07344caaaddcc8ef6
https://doi.org/10.1007/978-3-030-40498-7_4
https://doi.org/10.1007/978-3-030-40498-7_4
Autor:
Aaron R. Young, Joel Q.G. Spencer, Paul R. Hanson, Alan F. Halfen, Joseph A. Mason, William C. Johnson
Publikováno v:
Aeolian Research. 36:82-84
This corrigendum corrects a cartographic error made in Fig. 1 and an incorrect attribution of credit in the figure caption within ‘Late MIS 3 stabilization of dunes in the eastern Central Great Plains, USA.’ These changes to the Fig. 1 graphic an
Publikováno v:
The Holocene. 27:155-163
The Holocene–Pleistocene transition in the upland loess-mantled regions of the central Great Plains is punctuated by the Brady Soil, which separates the late-Pleistocene Peoria Loess and the Holocene Bignell Loess. Previous research on the Brady So
Publikováno v:
Quaternary International. 410:75-95
Geomorphic and chronologic data for dune fields are evaluated for three contrasting areas of North America: 1) the Prairie, Parkland and Boreal ecozones of the northern Great Plains in Canada; 2) the Central Great Plains of the USA; and 3) the desert
Autor:
Alan F. Halfen, Daniel R. Hirmas, Travis White, William C. Johnson, Terry A. Slocum, Steve Egbert, Aaron Gilbreath, Dave McDermott, Paul Atchley
Publikováno v:
Journal of Geoscience Education. 62:515-531
Stereoscopic displays provide geoscience instructors with the ability to teach students the fundamental, and inherently three-dimensional, components of landforms and landscapes; yet the prevalence of such displays in higher education is limited. As
Autor:
Daniel R. Hirmas, Eric Zautner, Paul Atchley, Terry A. Slocum, William C. Johnson, Alan F. Halfen, Huan Liu, Travis White, Dave McDermott, Stephen L. Egbert
Publikováno v:
Journal of Geoscience Education. 62:126-137
Recently, the use of stereoscopic three-dimensional (3-D) projection displays has increased in geoscience education. One concern in employing 3-D projection systems in large lecture halls, however, is that the 3-D effect is reported to diminish with
Autor:
William C. Johnson, Alan F. Halfen
Publikováno v:
Aeolian Research. 10:135-160
Aeolian dune fields of the North American Great Plains are sensitive indicators of past climate change given their activation during periods of drought. For the last 40 years, researchers have used a combination of geomorphic interpretations and radi
Autor:
Aaron R. Young, William C. Johnson, Alan F. Halfen, Paul R. Hanson, Gregory A. Ludvigson, Terri L. Woodburn
Publikováno v:
Aeolian Research. 5:9-20
This paper presents data for the Hutchinson dunes, the third and southernmost of three dunefields that collectively span a 400 km north–south transect of the eastern Great Plains. Optically stimulated luminescence dating was used to create a new, h