by neufer » Sat Mar 08, 2014 12:19 pm
http://en.wikipedia.org/wiki/Butte wrote:
<<Buttes are formed by erosion when hard caprock overlies a layer of less resistant rock that is eventually worn away. The hard rock resists erosion. The caprock provides protection for the less resistant rock below from wind abrasion which leaves it standing isolated. As the top is further eroded by abrasion and weathering the excess material that falls adds to the scree or talus slope around the base. On a much smaller scale, the same process forms hoodoos.>>
http://en.wikipedia.org/wiki/Aeolis_Mons wrote:
<<Aeolis Mons, also unofficially known as Mount Sharp, is a mountain on Mars. It forms the central peak within Gale Crater and is located around 5.08°S 137.85°E, rising 5.5 km (18,000 ft) high from the valley floor. It is feature ID 15000. The mountain appears to be an enormous mound of eroded sedimentary layers sitting on the central peak of Gale. It rises 5.5 km (18,000 ft) above the northern crater floor. The sediments may have been laid down over an interval of 2 billion years, and may have once completely filled the crater. Some of the lower sediment layers may have originally been deposited on a lake bed, while observations of possibly cross-bedded strata in the upper mound suggest aeolian processes. However, this issue is debated, and the origin of the lower layers remains unclear. If katabatic wind deposition played the predominant role in the emplacement of the sediments, as suggested by reported 3 degree radial slopes of the mound's layers, erosion would have come into play largely to place an upper limit on the mound's growth.>>
[quote=" http://en.wikipedia.org/wiki/Butte"]
<<Buttes are formed by erosion when hard caprock overlies a layer of less resistant rock that is eventually worn away. The hard rock resists erosion. The caprock provides protection for the less resistant rock below from wind abrasion which leaves it standing isolated. As the top is further eroded by abrasion and weathering the excess material that falls adds to the scree or talus slope around the base. On a much smaller scale, the same process forms hoodoos.>>[/quote][quote=" http://en.wikipedia.org/wiki/Aeolis_Mons"]
[float=right][img3=""]http://upload.wikimedia.org/wikipedia/commons/thumb/7/7e/Signal_Mountain_TX_1900.jpg/640px-Signal_Mountain_TX_1900.jpg[/img3][/float]<<Aeolis Mons, also unofficially known as Mount Sharp, is a mountain on Mars. It forms the central peak within Gale Crater and is located around 5.08°S 137.85°E, rising 5.5 km (18,000 ft) high from the valley floor. It is feature ID 15000. The mountain appears to be an enormous mound of eroded sedimentary layers sitting on the central peak of Gale. It rises 5.5 km (18,000 ft) above the northern crater floor. The sediments may have been laid down over an interval of 2 billion years, and may have once completely filled the crater. Some of the lower sediment layers may have originally been deposited on a lake bed, while observations of possibly cross-bedded strata in the upper mound suggest aeolian processes. However, this issue is debated, and the origin of the lower layers remains unclear. If katabatic wind deposition played the predominant role in the emplacement of the sediments, as suggested by reported 3 degree radial slopes of the mound's layers, erosion would have come into play largely to place an upper limit on the mound's growth.>>[/quote]