共查询到20条相似文献，搜索用时 546 毫秒
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Jansson and Glasser (Jansson, K.N., Glasser, N.F., 2008. Modification of peripheral mountain ranges by former ice sheets: the Brecon Beacons, southern UK. Geomorphology 97, 178–189.) have recently provided unconventional interpretations of selected glacial erosional and depositional landforms in the Brecon Beacons, UK, based on remotely sensed imagery. These new interpretations contradict well-established and reliable evidence for the origins and ages of certain glacial landforms of this upland area and elsewhere. They suggest that during a post-Last Glacial Maximum (LGM) ice-sheet event ice flowed up supposed, essentially “fluvial” valleys producing “glacial lineations” and depositing marginal moraines at the valley heads and on cirque floors. We argue that their interpretations of some key landforms are incorrect and that they have ignored much of the previous dating and field geomorphological evidence. Sedimentary and morphological evidence (e.g., lack of erratic content; convex planform with respect to the headwall; relatively large height range of moraines; and close association with headwall extent, height, and steepness) all indicate that higher level cirque-floor and valley-head moraines in the Brecon Beacons (> c. 400 m) were formed by cirque glaciers. Available dating evidence indicates a Younger Dryas age. We demonstrate that the supposed “fluvial” valleys, comprising trough heads with steep headwalls, have more nearly parabolic than V-shaped cross profiles indicating substantial glacial modification. Field evidence shows that proposed key exemplar post-LGM glacial lineations are in fact debris flow deposits. We conclude that whilst the adoption of a macroscale approach can shed new light on large-scale, ice-sheet movements, this approach should not be undertaken without consideration of the associated field evidence. 相似文献
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Jay D. Gatrell Neil Reid Thomas Steiger Bruce W. Smith Michael C. Carroll 《Applied geography (Sevenoaks, England)》2009,29(3):346-357
This paper examines the status of the floriculture industry in northwest Ohio, barriers facing firms in this transitioning sector, and strategies to promote industry competitiveness. Specifically, the paper focuses on the business practices of firms and efforts by local policymakers, academics, and business leaders to alter the regional dynamics of the industry vis-à-vis a grassroots “cluster” initiative. Using survey and focus group data, the paper demonstrates that culture, tradition, and shared values are key barriers to change and suggests that local cluster initiatives—like the Maumee Valley Growers—are an effective strategy for overcoming these barriers. From an applied perspective, the paper demonstrates the importance of contextualizing applied geographic research and the potential for geographers to chart, inform, and shape the internal geographies, practices, and trajectories of local actors and industry. 相似文献
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One way to probe into the direction in which American academic geography is heading is to look at the actual demand for specializations and teaching duties as expressed by the recent jobs offered by colleges and universities. The results of this inquiry for the 1990–1992 period indicate that the most frequently requested courses were GIS, regional geography, and environmental geography. The greatest number of positions were advertised as general physical geographer or human geographer and were in departments without graduate programs. The findings suggest that preparations for the profession of “geography professor” should include the ability both to conduct focused research and to teach a diverse set of courses. 相似文献
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Philip W. Suckling 《The Professional geographer》1994,46(2):164-169
The number of “Jobs in Geography” advertised in the AAG Newsletter for U.S. faculty positions is analyzed for the 14 academic years from 1979–80 through 1992–93. Results reveal more job opportunities in the latter half of the study period, especially for tenured/tenure track positions as opposed to temporary jobs. The share of available positions open to ranks above the Assistant Professor level is smaller in the early 1990s compared to the 1980s. A distinct decline in faculty openings occurs for 1992–1993. Considerable regional variations in the job market situation are revealed. 相似文献
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This paper examines gay men's perceptions and experiences of everyday places in Adelaide, South Australia. It illustrates the nature of social space as a heterosexual artifact. The paper also outlines ways in which gay men may contribute to the heterosexualization of space. Many gay men monitor the public and private roles they play for fear of the consequences of “discovery,” and through self-policing and restricted behaviors they may contribute to the spatial supremacy of heterosexuality. Acts of nondisclosure and the adoption of straight sexual facades constrain gay men's social and spatial lives. 相似文献
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MARCIA YONEMOTO 《Geographical review》1999,89(2):169-187
ABSTRACT. This article examines the ways in which oceans were depicted in Japanese geographical writings and maps from the Tokugawa period. It uses these texts to understand how early modern Japanese visions of the Pacific and of maritime Asian waters constructed epistemological frameworks through which the Japanese saw their place in an increasingly complex web of regional and global connections. In the absence of actual adventure on the “high seas,” Japanese writers, artists, and mapmakers used the inventive power of the imagination to fill in the cognitive blank of ocean space. I argue that the definition of early modern oceanic space was profoundly ambiguous, a legacy that, it can be argued, left its mark on Japan's modern relationship with the Asian Pacific region. 相似文献