What may cause the entire orogen to uplift during or at the end of the collisional history?
What will be an ideal response?
Ans: Delamination of the lower lithosphere, where a heavy (dense) root descends into the lithospheric mantle, which gives an isostatic instability that results in uplift of the orogenic edifice. The reason why this can occur at the end of an orogenic cycle is because it requires deep subduction of cold lithosphere.
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About what percentage of the Earth's surface is covered by midlatitude deserts and semiarid
grasslands? a. 14% b. 23% c. 32% d. 41% e. 55%
Water pollution results when more waste is added than the receiving water can accommodate
Indicate whether the statement is true or false.
The presence of sea shells on beaches indicates that
A) waves erode some beach sediment from shoreline rock and regolith. B) streams deliver large volumes of sediment to the ocean. C) waves erode sediment from the seafloor. D) longshore currents carry sediment off the end of a headland.
Cold seawater holds less oxygen than warm seawater at the same pressure and salinity.
Answer the following statement true (T) or false (F)