Climatic data and satellite imagery for assessing the aeolian sand deposit and barchan migration, as a major risk sources in the region of In-Salah (Central Algerian Sahara)

2016 ◽  
Vol 9 (6) ◽  
Author(s):  
Nouar Boulghobra
Keyword(s):  
Satellite Imagery ◽  
Climatic Data ◽  
Aeolian Sand ◽  
Algerian Sahara ◽  
Risk Sources ◽  
Sand Deposit

scholarly journals Four decades period of climatic data for assessing the aeolian hazard in the region of Touggourt (Low Algerian Sahara)

2016 ◽  
Vol 11 (1) ◽  
pp. 13-22 ◽  
Author(s):  
Nouar BOULGHOBRA ◽  
Naïma KOULL ◽  
Tidjani BENZAOUI
Keyword(s):  
Climatic Data ◽  
Algerian Sahara

Changes in the Mrdalsjkull ice cap, south Iceland: possible uses of satellite imagery

Polar Record ◽  
1976 ◽  
Vol 18 (112) ◽  
pp. 73-76 ◽  
Author(s):  
R. D. Crabtree
Keyword(s):  
Satellite Imagery ◽  
Climatic Data ◽  
Ice Cap ◽  
The Earth ◽  
Base Camp ◽  
Western Side

The Mrdalsjkull ice cap, in southern Iceland, was visited in July and August 1975 by a party of seven, operating from a base camp on its western side, at the head of the Prsmrk valley. The objectives of the expedition were to record evidence of changes in the extent of the ice cap since its last re-advance (about 1850?) with a view to correlation with climatic data, and to examine the role of imagery from the Earth Resources Technology Satellite-1 (ERTS-1) in this context.

Satellite imagery and airborne geophysics for geologic mapping of the Edembo area, Eastern Hoggar (Algerian Sahara)

2016 ◽  
Vol 115 ◽  
pp. 143-158 ◽  
Author(s):  
Takfarinas Lamri ◽  
Safouane Djemaï ◽  
Mohamed Hamoudi ◽  
Basem Zoheir ◽  
Abderrahmane Bendaoud ◽  
...  
Keyword(s):  
Satellite Imagery ◽  
Geologic Mapping ◽  
Algerian Sahara ◽  
Airborne Geophysics

Variations in Surface Textures of Quartz Sand using Electron Microscopy

1970 ◽  
Vol 28 ◽  
pp. 494-495
Author(s):  
Eugene J. Amaral
Keyword(s):  
Electron Microscopy ◽  
Glass Industry ◽  
Glass Slide ◽  
Distilled Water ◽  
Early Paleozoic ◽  
Secondary Effects ◽  
Surface Textures ◽  
High Silica ◽  
Sand Deposit ◽  
The U.S

Examination of sand grain surfaces from early Paleozoic sandstones by electron microscopy reveals a variety of secondary effects caused by rock-forming processes after final deposition of the sand. Detailed studies were conducted on both coarse (≥0.71mm) and fine (=0.25mm) fractions of St. Peter Sandstone, a widespread sand deposit underlying much of the U.S. Central Interior and used in the glass industry because of its remarkably high silica purity.The very friable sandstone was disaggregated and sieved to obtain the two size fractions, and then cleaned by boiling in HCl to remove any iron impurities and rinsed in distilled water. The sand grains were then partially embedded by sprinkling them onto a glass slide coated with a thin tacky layer of latex. Direct platinum shadowed carbon replicas were made of the exposed sand grain surfaces, and were separated by dissolution of the silica in HF acid.

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