نتایج جستجو برای: geomorphological landforms

تعداد نتایج: 4459  

2004
G H Stewart J B J Harrison

Forest types of the Wapiti, Doon and Glaisnock catchments, ranked in order of proportion of preferred food species for deer, paralleled a gradient of landform stability. Seral forests and low altitude silver beech forests were preferred deer habitat because they contained the largest proportions of highly preferred species. They often occurred on unstable landforms such as debris cones, colluvi...

2012
Cyril Fleurant G. E. Tucker H. A. Viles C. Fleurant H. A. VILES

The purpose of this article is to present a model of the formation processes of cockpit karst landscapes. The CHILD software was used to simulate landscape evolution including dissolution processes of carbonate rocks. After examining briefly how the CHILD model operates, two applications of this model involving dissolution of carbonate rocks are presented. The simulated landscapes are compared ...

2004
Patrick L. Barnard Lewis A. Owen Robert C. Finkel

The Gangotri Glacier, at the source of the Ganges River, has fluctuated greatly throughout the late Quaternary in response to climatic oscillations. This has resulted in impressive moraines, paraglacial debris flow fans and terraces along the upper stretches of the Bhagirathi Valley. Cosmogenic radionuclide (CRN) dating of glacial and paraglacial landforms shows that fans, terraces and associat...

Journal: :Remote Sensing 2017
Stefano Biagetti Stefania Merlo Elhadi Adam Agustin Lobo Francesc C. Conesa Jasper Knight Hayette Bekrani Enrico R. Crema Jonas Alcaina-Mateos Marco Madella

We present preliminary results of an Earth observation approach for the study of past human occupation and landscape reconstruction in the Central Sahara. This region includes a variety of geomorphological features such as palaeo-oases, dried river beds, alluvial fans and upland plateaux whose geomorphological characteristics, in combination with climate changes, have influenced patterns of hum...

Journal: :Geoarchaeology-an International Journal 2023

Lidar has become an essential tool for the mapping and interpretation of natural archaeological features within landscape. It is also increasingly integrated visualized geoarchaeological deposit models, providing valuable topographic stratigraphic control from contemporary ground surface downwards. However, there a wide range methods available visualization lidar elevation models review existin...

2006
R. B. GRAYSON

The topography of a catchment has a major impact on the hydrological, geomorphological. and biological processes active in the landscape. The spatial distribution of topographic attributes can often be used as an indirect measure of the spatial variability of these processes and allows them to be mapped using relatively simple techniques. Many geographic information systems are being developed ...

Journal: :Geomorphology 2021

The Central Pyrenees hosted a large ice cap during the Late Pleistocene. cirques under relatively low-altitude peaks (2200–2800 m) include greatest variety of glacial landforms (moraines, fossil debris-covered glaciers and rock glaciers), but their age formation process are poorly known. Here, we focus on headwaters Garonne River, namely Bacivèr Cirque (highest at ~2600 m), with widespread eros...

2011
Wen Zhang Yuichi S. Hayakawa Takashi Oguchi

“Danxia landform” is a landform type originally defined in China, characterized by red-colored sandstones and steep cliffs, and developed through long-term erosion. In recent years, Danxia landforms have been receiving international attention, and six examples in China became a UNESCO World Natural Heritage in 2010. However, morphometric studies of Danxia landforms in China have been very limit...

Journal: :Earth and Planetary Science Letters 2021

Terrestrial cosmogenic nuclide dating of ice-marginal moraines can provide unique insights into Quaternary glacial history. However, pre- and post-depositional exposure histories moraine boulders introduce geologic uncertainty to numerical landform ages. To avoid outliers, are typically selected based on their depositional context individual characteristics but while these criteria have good qu...

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