Which of the following is an example of an exfoliation dome?
Rising more than 800 feet from its base, Dome Rock is a classic example of an exfoliation dome that formed on Pikes Peak Granite. Dome Rock, a Teller County landmark, is a classic example of the process of exfoliation.
Where is exfoliation most likely to occur?
mountain regions Where is exfoliation most likely to occur? Exfoliation occurs mostly in mountain regions where intrusive igneous rock has been uplifted and exposed by erosion.
Which of the following is produced by mechanical weathering?
Mechanical Weathering Mechanical weathering, also called physical weathering and disaggregation, causes rocks to crumble. Water, in either liquid or solid form, is often a key agent of mechanical weathering. For instance, liquid water can seep into cracks and crevices in rock.
What is unloading in mechanical weathering?
UNLOADING–removal of rock overburden causes rocks that were under pressure to expand, creating joints, cracks in a rock that have not had appreciable movement of rock along the cracks. The process of expansion by unloading leads to "sheeting" that forms exfoliation domes (such as in Yosemite National Park, CA).
What type of weathering is exfoliation?
mechanical weathering Exfoliation is a form of mechanical weathering in which curved plates of rock are stripped from rock below. This results in exfoliation domes or dome-like hills and rounded boulders.
How exfoliation dome is formed?
A large homogeneous rock is exposed to alternate expansion and contraction of the outer layer in a rock. This is caused by temperature differences. Once the material has peeled off and rolled away a smooth dome shaped rock is left behind. It is called an exfoliation dome.
What is exfoliation in weathering?
Exfoliation is a process in which large flat or curved sheets of rock fracture and are detached from the outcrop due to pressure release: As erosion removes the overburden from a rock that formed at high pressure deep in the Earth´s crust, it allows the rock to expand, thus resulting in cracks and fractures along sheet …
Is exfoliation physical or chemical weathering?
Another form of physical weathering is exfoliation. Many rocks form deep underground, under forces of extreme pressure. When erosion or shifting glaciers reveal these rocks, the lack of pressure causes the top of the rocks to split apart into smaller sheets.
What process forms exfoliation domes?
The process of expansion and contraction of an outer layer of rock due to temperature changes forms exfoliation domes.
What is an exfoliation dome?
Definition of exfoliation dome : a large dome-shaped rock mass (as of granite) produced by exfoliation.
What weathering process produces granite exfoliation domes?
physical weathering As the granite expands the outer, most shells become susceptible to weathering by water pressure, freeze/thaw cycles, and functioning vegetation is a process called physical weathering. The sheets of granite are large enough to shave off sharp edges on the granite's surface creating a dome shape.
How is exfoliation dome formed?
Exfoliation domes form from pressure release and are typically found in granite. Igneous intrusive rocks form at tremendous depth and pressure. When they are uplifted the pressure is released and the rock can expand. It does so along fractures called sheet joints that more or less parallel the existing rock surface.