Spheroidal Weathering Granite

The initial shape of the joint block controls the closeness to spherical form eventually achieved.

Spheroidal weathering granite.

All of the possible answers are correct. As a result in granitic terrains knob shaped outcrops and spheroidal blocks accumulate on the surface. Spheroidal weathering is the result of chemical weathering of systematically jointed massive rocks including granite dolerite basalt and sedimentary rocks such as silicified sandstone it occurs as the result of the chemical alteration of such rocks along intersecting joints. Chemical weathering can change the shape of a rock and it s chemical composition.

Spheroidal weathering is a form of chemical weathering. In contrast in arid regions the rate of chemical weathering is slow relative to the rate of surface erosion. The granite dells is a geological feature north of prescott arizona. In humid regions spheroidal weathering of granite typically occurs in the subsurface.

Chemical weathering is fastest where surface area is low. That is exactly what happened but agent of change was and is weathering. Spheroidal weathering in thoroughly decomposed granite hong kong. Spheroidal weathering is due to faster rates of weathering along corners and edges of a rock.

Ollier spheroidal in shape. We made an investigation on spheroidal weathering of miocene granite porphyry with well developed columnar joints and found that this spheroidal weathering proceeds through chemical processes and accompanying mechanical processes. The process is closely related to that of exfoliation q v except that the latter refers usually to large. Spheroidal weathering spheroidal weathering is most common among coarse grained igneous rocks especially granite and similar rock types.

A characteristic weathering form in massive rocks granite dolerite basalt and even some sedimentary types such as silicified sandstones results in the production of spheroidal boulders of unweathered rock around which are to be observed layers or flakes of disintegrated material. Spheroidal weathering almost all of the granite boulders littering this portion of the mcdowell mountain regional park have a spheroidal shape. It is almost as though a sculptor started with a cube or a cube like shape and rounded the corners. The investigation of the textures physical properties mineralogy and chemistry of the porphyry revealed the.

Rev 7 1971 127 141 132 c d. Chemical weathering converts granite to clay minerals and quartz grains. It is more likely to be found in warm climates where mechanical weathering by freezing ice is less likely.