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Continental shields are formed through a combination of geological processes, primarily involving the stabilization of ancient continental crust. This occurs through plate tectonics, where tectonic plates converge, leading to the formation of mountain ranges and the metamorphism of rocks. Erosion also plays a key role in exposing the underlying crystalline rocks that make up the shield. Over time, these processes result in broad, flat areas of exposed igneous and metamorphic rocks, characteristic of continental shields.
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What type of volcano is a buildup of basaltic layer's forming a broad volcano with gently sloping sides?
A shield volcano
Is mount Krakatoa a shield volcano?
No. Caldera and shield volcanoes are quite different. Shield volcanoes usually undergo effusive eruptions, the least violent type and produce basaltic lava. Caldera forming volcanoes erupt explosively and are the most violent. They generally produce rhyolitic lava.
What is a good example of a shield volcano?
Shield volcanoes, so named for their broad, shield-like profiles, are formed by the eruption of low-viscosity lava that can flow a great distance from a vent. They generally do not explode catastrophically. Since low-viscosity magma is typically low in silica, shield volcanoes are more common in oceanic than continental settings. The Hawaiian volcanic chain is a series of shield cones, and they are common in Iceland, as well.
How is the Canadian Shield an example of a craton?
The Canadian Shield is an ancient and stable geological formation, characteristic of a craton. It consists of some of the Earth's oldest rocks and has remained largely unchanged for billions of years, making it a prime example of a craton - a large, stable portion of the continental lithosphere.
Some continents contain large core areas of Precambrian rocks called?
cratons. These cratons are stable, ancient regions of the Earth's crust that hold some of the oldest rocks on the planet. They are often found in the interiors of continents like in Africa, Australia, and North America.
How does a mountain belt evolve into art of a continental shield?
A mountain belt forms from the collision of tectonic plates, creating fold mountains. Over time, erosion and tectonic processes flatten the mountains, transforming the mountain belt into a continental shield characterized by a large, stable continental core with little tectonic activity or deformation.
How does a mountain belt evolve into part of a continental shield?
A mountain belt can evolve into part of a continental shield through a process called erosion and tectonic stabilization. Over time, the mountains are eroded by geological processes, causing them to decrease in elevation and flatten out. As the tectonic activity in the area calms down, the rocks that formed the mountains become more stable and start to form a stable, relatively flat landmass known as a continental shield.
What physiographic region was most affected by glaciation--massive continental glaciers?
The Canadian shield
What type of volcano is a buildup of basaltic layer's forming a broad volcano with gently sloping sides?
A shield volcano
What are the industries in the Canadian shield?
Well i make a living by stripping in the Canadian shield it pays great! i just love itThe Canadian Shield is one of the world's largest geologic continental shields and is centered on the Hudson Bay. Some of its industries include: forestry, mining and farming.
What shape do Hawaiian volcanoes have?
They are shield volcanoes. This means that they are cone shaped but with very shallow slope angles forming the volcanoes flank.
Is mount Krakatoa a shield volcano?
No. Caldera and shield volcanoes are quite different. Shield volcanoes usually undergo effusive eruptions, the least violent type and produce basaltic lava. Caldera forming volcanoes erupt explosively and are the most violent. They generally produce rhyolitic lava.
How old is the oldest continental crust?
The oldest continental crust is estimated to be around 4 billion years old. It can be found in regions like the Canadian Shield and parts of Western Australia.
What kind of magma produce violent eruptions?
The magma that can produce a violent eruptions is those rich in silica,fluid,iron, and forming shield volcano.
How did the ozone layer get involved with the earth?
Ozone is present as a shield to earth. It protects us from harmful UV rays.
What kind of damage does a shield volcano have?
A volcano, any volcano type, is the result of extrusive volcanic processes. As such it cannot be said to have damage.
Why does intermountain region receive less rain than the Pacific Coast?
The coastal mountains act as a shield and prevent moisture from crossing forming a rain shadow.
