Secondary blowout with low elevation appeared at the sand deposition zone due to differential erosion
, behind which a parabolic dune developed with its own stoss slope and slope crest.
In Brazil, summit level technique was introduced for the morphologic analyses of Pocos de Caldas alkaline intrusive complex, State of Minas Gerais, in order to examine if the present morphology is originated from a volcanic caldera or differential erosion of felsic alkaline intrusive rocks.
Theses morphologic characteristics are similar to those of felsic alkaline intrusive massifs of Pocos de Caldas-Cabo Frio magmatic alignment, which are originated from differential erosion, and not to those of the volcanic calderas.
The surface roughness is a vital surface dynamic parameter, as it reveals tremendous information, such as nature of landforms(Hobson, 1983) amount of differential erosion
and spatial distribution of landscape dissectivity (Grohmann, 2004; Grohmann and Riccomini, 2009).
The detailed investigation of erosion surfaces throughout the Barnett Shale showed that these surfaces are part of zones vertical reliefs ranging from a few millimeters to several centimeters (Figure 2) as a result of differential erosion
; considering that prior to compaction, this relief would have been up to 90% greater .
The Balanced Rock, that magnificent hoodoo on which my camera is currently trained, is a product of this differential erosion
. The monster rock is composed of hard Entrada Sandstone, which is more resistant to the ravages of the elements than its pedestal, formed from the more fragile Dewey Bridge Member of the Carmel Formation.
The differential erosion
at various places in the study area has lead to the loading and unloading of overlying relatively higher density rocks.
The region is dominated by hills and mountains that are produced by differential erosion
of Pennsylvanian deposits of limestones, sandstones and shale.
Due to tectonic domination over erosion and climate, this region has uplift rates of about 2-3 mm/year and differential erosion
is also active here due to recent neotectonic activity in Kashmir, and due to plentiful precipitation both in summer and winter.
Figure 10 serves to show, in this case, the role of differential erosion in the definition and reworking of inherited forms (Figure 11).
These palaeoclimates testimonials relieves show themselves quite reworked by the action of differential erosion.