geo quiz 6
| Question | Answer |
|---|---|
| Which of the following best describes the bedrock in the Sierra Nevada Mountains in California? | granite; batholiths |
| Most of the active volcanoes on Earth are located in a belt known as the ________. | Ring of Fire |
| Dissolved gases may comprise up to a few percent by weight of a magma. | T |
What large igneous feature makes up the Sierra Nevada Mountains in California?
Granite makes up the majority of the Sierra Nevada Batholith, a massive batholith that lies at the center of the Sierra Nevada mountain range in California and that is known as the Sierra Nevada Batholith.
What term describes hot mixture of gas ash and pumice that race down the flanks of volcanoes at speeds of up to 125 mph?
Pyroclastic flows are made up of a high-density mixture of pumice, ash, volcanic gas, and hot lava pieces. They travel at extremely high speeds down the sides of the volcanoes, generally following troughs.
Is an intrusive igneous rock body that is tabular and concordant?
Tabular bodies that are concordant are what make up a sill. A sill that has the appearance of a blister is known as a laccolith. A pegmatite is a kind of igneous rock that has crystals that may be up to 10 meters wide and has incredibly coarse grains.
What type of basin would be most likely to contain large amounts of sediments derived from a volcanic source quizlet?
Which of the following types of basins is most likely to be home to significant quantities of sediments that originated from volcanic activity? A basin in the forearc.
What type of rock are the Sierra Nevada mountains made of?
The Sierra Nevada are comprised of a massive piece of the earth’s crust that was detached on the eastern side and then shifted toward the west. It is mostly made up of granitic rocks that date back to the Mesozoic era as well as metamorphosed sedimentary and volcanic rocks that date back to the Paleozoic era and the Mesozoic era.
Are the Sierra Nevada mountains granite?
Granitic granite predominates the terrain of the Sierra Nevada mountain range.
When water seeps into the still hot pyroclastic flow a steam explosion referred to as a?
When the rock of the pyroclastic flow interacts with water to generate a swiftly moving slurry, another type of mudflow that can contain volcanic debris can occur. This type of mudflow is known as a lahar. An eruption is the process of material being released from an opening in the crust of the Earth. lahar.
What can be inferred about the silica content and temperature of magma if it has a low viscosity?
A larger percentage of silica results in a greater degree of viscosity. But at lower temperatures and with a smaller gas component, the viscosity will be higher. Therefore, a greater temperature is indicative of magma that has a lower viscosity and a lower gas concentration.
Why were so many trees knocked down during the Mt St Helens eruption while that was not true of the Kilauea volcano quizlet?
The explosion created by Mount St. Helens was powerful enough to topple trees, but the activity of the Kilauea volcano was far less intense.
What type of igneous intrusion is concordant and is typically found in near surface environments?
Laccoliths. A concordant incursion with a flat base and a dome-shaped ceiling is referred to as a laccolith. Laccoliths are known to occur at shallow depths, often at a distance of less than 3 kilometers (1.9 mi), particularly in areas where the crust is compressed.
How are intrusive and extrusive igneous rocks different?
Extrusive and intrusive igneous rocks are the two primary classifications of igneous rocks. Lava, which is magma that has risen to the surface of the Earth, is the source of the formation of extrusive rocks on the surface of the planet. Intrusive rocks are generated when magma within the crust of the planet cools and solidifies, resulting in the formation of the rock.
What are the intrusive igneous rocks?
Igneous Rock That Is Intrusive Intrusive igneous rock, also known as plutonic igneous rock, is formed when lava cools and solidifies in chambers inside pre-existing rock after being contained beneath the crust of the Earth. The lava cools down extremely gradually over the course of many thousands or millions of years until it finally becomes solid.
Which type of tectonic boundary would be associated with most mountain belts?
The collision of two converging plate boundaries would cause tectonic forces, which would then compress and raise the rocks, resulting in the formation of mountains.
When the Indian Plate collided with Eurasian Plate Why didn’t it Subduct choose all that apply?
What prevented the Indian Plate from subducting beneath the Eurasian Plate when it clashed with it? The Indian Plate has an excessive amount of buoyancy. The Indian Plate has an excessively high thickness.