132
A. B. A. Belal et al.
Fig. 8 Sand dune in Dakhla Oasis. Photo taken by Authors, 2017
3.5 Sand Sheet
Sand sheet unit cover a wide area in Dakhla Oasis, this area is flat to almost flat
and characterised by low vegetation cover as the precipitation rate is low. sand set
is cover by sand dune (Breed et al. 1987), the thickness layer of sand sheet is less
than 20 m of Eolian sand sheet sedimentary successions (Mountney 2006), due to
these sedimentation conditions are transitional to dune fields or because geographic
position difficult their accumulation
3.6 Inselbergs
Inselberg is one of the landforms resulting from erosional processes. For an inselberg
to form, there has to be pronounced variations in the level of weathering of the land
surface. These include the buttes, mesas and conical hills. They are well represented
where a hard cap rock overlies relatively softer sediments. Inselberg can be a range
or hill that stands isolated rising like an island from the flat plains. Although they
vary in names as they vary in forms, they are all bald domically shaped and steep
sided (Twidale 1962).
A. B. A. Belal et al.
Fig. 8 Sand dune in Dakhla Oasis. Photo taken by Authors, 2017
3.5 Sand Sheet
Sand sheet unit cover a wide area in Dakhla Oasis, this area is flat to almost flat
and characterised by low vegetation cover as the precipitation rate is low. sand set
is cover by sand dune (Breed et al. 1987), the thickness layer of sand sheet is less
than 20 m of Eolian sand sheet sedimentary successions (Mountney 2006), due to
these sedimentation conditions are transitional to dune fields or because geographic
position difficult their accumulation
3.6 Inselbergs
Inselberg is one of the landforms resulting from erosional processes. For an inselberg
to form, there has to be pronounced variations in the level of weathering of the land
surface. These include the buttes, mesas and conical hills. They are well represented
where a hard cap rock overlies relatively softer sediments. Inselberg can be a range
or hill that stands isolated rising like an island from the flat plains. Although they
vary in names as they vary in forms, they are all bald domically shaped and steep
sided (Twidale 1962).