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Why would you expect the crystals in an intrusive rock to be larger than the crystals in the extrusive rock?
Because as an intrusive rock cools underground, it will normally cool more slowly than an extrusive (surface) rock. The slow cooling allows more time for the crystals to grow.
Why would you expect the crystals in an intrusive rock to be larger than the crystals in an extrusive rock?
Crystals in intrusive rocks have more time to grow as the magma cools slowly beneath the Earth's surface, allowing for larger crystal sizes to form. In contrast, extrusive rocks cool quickly at the Earth's surface, resulting in smaller crystals due to the rapid cooling process.
What condition would you expect a coarse-grained extrusive rock like dacite to form?
Coarse-grained extrusive rocks like dacite typically form under conditions of relatively slow cooling, which allows larger crystals to develop. This often occurs in volcanic environments where magma is expelled from a volcano and cools quickly upon reaching the surface, yet retains some degree of insulation, such as being trapped in a thick lava flow. The presence of gas bubbles and the viscosity of the lava can also influence crystal growth, leading to a textured appearance. However, true coarse-grained textures are more characteristic of intrusive rocks; dacite is generally fine-grained due to rapid cooling, suggesting a need for reconsideration of the classification.
What kind of rocks would you expect to find near a volcano thathas erupted?
Extrusive, Igneous rocks possibly lavas or ignimbrites.
What type of rocks would you expect to find around a volcano crater?
You would find extrusive igneous rocks. Beyond that it depends on the volcano.
Why would you expect the crystals in an intrusive rock to be larger than the crystals in the extrusive rock?
Because as an intrusive rock cools underground, it will normally cool more slowly than an extrusive (surface) rock. The slow cooling allows more time for the crystals to grow.
Why would you expect the crystals in an intrusive rock to be larger than the crystals in an extrusive rock?
Crystals in intrusive rocks have more time to grow as the magma cools slowly beneath the Earth's surface, allowing for larger crystal sizes to form. In contrast, extrusive rocks cool quickly at the Earth's surface, resulting in smaller crystals due to the rapid cooling process.
Where would you expect to find an igneous rock with small crystals?
You would expect to find an igneous rock with small crystals near the Earth's surface where the rock cools relatively quickly, such as in volcanic eruptions or magma intrusions that do not have much time to grow large crystals. These rocks are known as volcanic or extrusive igneous rocks.
Under which condition below would you expect a coarse grained extrusive rock?
You would expect a coarse-grained extrusive rock when the magma cools and solidifies slowly underground, allowing larger crystals to form due to extended cooling time. This can happen in magma chambers or in deep-seated volcanic environments where the magma has more time to cool and crystallize before reaching the surface.
What kind of rocks would you expect to find near a volcano thathas erupted?
Extrusive, Igneous rocks possibly lavas or ignimbrites.
What type of rocks would expect to find around a volcano crater?
You would find extrusive igneous rocks. Beyond that it depends on the volcano.
Under what condition below would you expect a coarse grained intrusive rock like diorite to form?
Slow cooling in the upper mantle
What type of rocks would you expect to find around a volcano crater?
You would find extrusive igneous rocks. Beyond that it depends on the volcano.
Why would you expect extrusive rocks produced by an explosive volcano to be light or dark in color?
Extrusive rocks produced by an explosive volcano are likely to be dark in color because they cool quickly on the Earth's surface, preventing mineral crystals from forming. This rapid cooling results in a fine-grained texture that appears dark in color due to the presence of minerals like olivine or pyroxene.
What condition under below would you expect a coarse-grained intrusive rock like diorite to form?
Slow cooling in the upper mantle
Where would you expect to find the largest crystals in a lava flow?
The largest crystals in a lava flow can typically be found in the center or core of the flow where cooling occurs more slowly, allowing for more extensive crystal growth. These areas are often shielded from rapid cooling by the outer crust of the flow.
A student visits the area around a volcano that has recently erupted The student can expect to find samples of?
extrusive ingeneous rocks
