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Mount St Helens lava composition?
The lava composition of Mount St. Helens is typically classified as andesitic, which means it contains a mixture of minerals such as plagioclase feldspar, pyroxene, and amphibole. Andesitic lava is known for being thicker and more viscous compared to basaltic lava, which can contribute to explosive eruptions from stratovolcanoes like Mount St. Helens.
What has nothing to do with igneous intrusive activity?
Sedimentary rock formation has nothing to do with igneous intrusive activity. Unlike igneous rocks, which form from the cooling and solidification of magma or lava, sedimentary rocks are created through the accumulation and compaction of mineral and organic particles. Processes such as erosion, weathering, and deposition are key to sedimentary rock formation, contrasting with the processes involved in igneous intrusion.
Lava is an example of what kind of rock?
Lava flows in Hawaii are an example of Mafic Lava. Mafic Lava is composed of Basaltic rocks of which tend to have high levels of iron and magnesium.
Is dike a type of lava flow?
A dike is not a type of lava flow, but rather a sheet-like intrusion of igneous rock that cuts across existing rock layers. Dikes form when molten rock (magma) is injected into fractures in the Earth's crust and crystallizes before reaching the surface.
What feature is formed when lava cuts across rock layers and hardens?
A dike is formed when lava cuts across rock layers and hardens. This igneous intrusion results in a narrow, tabular rock formation that can be exposed on the Earth's surface due to erosion or uplift.
Why are there no fossils in a intrusion?
If you mean an intrusion via magma/lava, then fossils would not exist due to the fact that most fossils are found in SEDIMENTARY rock, not IGNEOUS (magma/lava rocks).
Why is soil formed from the weathering of volcanic lava not very fertile?
Soil formed from the weathering of volcanic lava is not very fertile because it lacks essential nutrients and organic matter needed for plant growth. The rapid cooling of lava prevents the formation of minerals and organic material that contribute to soil fertility.
Mount St Helens lava composition?
The lava composition of Mount St. Helens is typically classified as andesitic, which means it contains a mixture of minerals such as plagioclase feldspar, pyroxene, and amphibole. Andesitic lava is known for being thicker and more viscous compared to basaltic lava, which can contribute to explosive eruptions from stratovolcanoes like Mount St. Helens.
What is a example of magma?
Lava
How many caves are formed by erosin?
All except lava-tubes, which result from lava draining from under the solidified crust of a lava flow. Most are in limestone, soluble in water acidified by carbon-dioxide from the atmosphere (chemical weathering).
What is a living example of a lava lamp?
A volcanic eruption is a living example of a lava lamp, where molten lava rises to the surface, cools, and solidifies. The cycle repeats as new lava continues to flow, resembling the movement of the liquid wax in a lava lamp.
What are the changes extrusive volcanic features may undergo over time?
Extrusive volcanic features, such as lava flows and volcanic cones, can undergo changes over time due to weathering and erosion. Weathering breaks down the rock material, while erosion removes the material, shaping the landforms. This process can result in the gradual leveling of volcanic cones and altering the appearance of lava flows.
What has nothing to do with igneous intrusive activity?
Sedimentary rock formation has nothing to do with igneous intrusive activity. Unlike igneous rocks, which form from the cooling and solidification of magma or lava, sedimentary rocks are created through the accumulation and compaction of mineral and organic particles. Processes such as erosion, weathering, and deposition are key to sedimentary rock formation, contrasting with the processes involved in igneous intrusion.
This massive underground lava upwelling is sometimes called an igneous what?
When magma below the earth's surface penetrates the crust but does not break the surface, it is called an igneous intrusion.
How can you tell the difference between an intrusion and extrusion if there is a layer of sandstone on top?
An intrusion is formed when magma pushes into surrounding rock layers, creating intrusive features like veins or sills, which would be visible beneath the layer of sandstone. In contrast, an extrusion occurs when magma is ejected onto the surface as lava, forming extrusive features like lava flows or volcanic cones above the sandstone layer. The presence of different types of volcanic features would help distinguish between an intrusion and an extrusion in this scenario.
How is a cave?
Caves can form in a variety of ways, but most caves are dissolutional and are initially formed by chemical weathering of surface rock, usually limestone, by carbonic acid contained in rainwater. As chemical weathering continues, mechanical weathering joins in the fun to further attack and widen joints and fissures in what is usually soluble sedimentary rock, like limestone.Some other types of caves are formed by percolating sulfuric acid, flowing lava, flowing water in glaciers, wave action, and particle abrasion.
Lava is an example of what kind of rock?
Lava flows in Hawaii are an example of Mafic Lava. Mafic Lava is composed of Basaltic rocks of which tend to have high levels of iron and magnesium.
