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What causes the separation of mafic and felsic minerals during the formation of gneiss?
Insoluble Mafic minerals precipitate immediately forming a mafic layer. Felsic minerals remain in solution and precipitate in pulses when bacterial respiration gases belch out from comet oceans. When the gasses belch and the pressure over the ocean drops, the ice-water boundary flash freezes and expels felsic solutes that precipitate in pulses onto the mafic muck at the bottom. Shifting and settling of these sedimentary layers forms the sharp zigzag folds in the gneiss (migmatites).
Once the comet ocean reaches its high water mark, it begins to freeze solid and the bacteria deprived of fresh nebular dust die off, so mafic precipitation ceases. Soluble felsic material continues to to precipitate until the ocean freezes solid, forming a layer of felsic granite over the felsic-mafic gneiss core.
When comets impact the earth, the water and carbon dioxide ices react endothermally (creating a chemical shock absorber) protecting the gneiss from melting, but the momentum of the impact extrudes the core into an elliptical configuration with a 2:1 or 3:1 aspect ratio.
Because there's more water than land on earth, more comets impact at sea and then align themselves parallel to the leading edge of tectonic plates. When the tectonic plates collide, the gneiss domes are incorporated into orogenic mountains. The Appalachians and the Himalayas contain numerous gneiss domes with comet schist and granite (and other plutonic and clastic rock) in their mantles.
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Which would mostly likely occur during the formation of igneous rock?
The basic processes involves in igneous rock formation are; 1. Melting (Magma, formation of molten substance). 2. Volcanicity (Eruption, movement of magma). 3. Cooling (Change in temperature). 4. Crystallization (Mineralization, formation of crystals and minerals). 5. Solidification (Consolidation into a solid mass to form igneous rock).
Do minerals stay the same during metamorphosis?
Earth movements form metamorphic rocks by pressing, squeezing, and folding. Sometimes minerals are destroyed and new minerals are created
What are the similarities between the minerals hematite and garnet?
Hematite and garnet are both important minerals found in metamorphic and igneous rocks. They share a similar crystalline structure, often forming in well-defined shapes, which contributes to their distinctive appearances. Additionally, both minerals can be used as indicators of geological processes and conditions, such as temperature and pressure during rock formation. While they differ in composition—hematite is primarily an iron oxide and garnet is a silicate mineral—they can coexist in certain geological environments.
During the formation of the universe the first force to become separate phenomenon?
GRAVITY
What is the sequence of events during a battalion awards ceremony?
formation of troops, honors, ceremony, remarks
What process causes minerals to form in a shallow lake during dry conditions?
Evaporation of water in a shallow lake during dry conditions concentrates the dissolved minerals, leading to their precipitation and formation of evaporite minerals such as gypsum or halite. This process is known as evaporite deposition.
The process of minerals formation from magma is called?
The process of minerals formation from magma is called crystallization. During this process, minerals solidify and form crystals as the magma cools and hardens.
What process causes minerals to form in shallow lake during dry conditions?
Studies show that the process evaporation causes the minerals to form.
What byproduct is obtained during the separation of lead from rock?
During the separation of lead from rock, one common byproduct obtained is sulfur dioxide gas. This byproduct is a result of the oxidation of sulfur-containing minerals present in the rock during the smelting process.
What is the significance of the crystal period in the formation of minerals?
The crystal period is significant in mineral formation because it is during this time that minerals grow and develop their characteristic crystal structures. This process helps determine the physical and chemical properties of the minerals, making them unique and identifiable.
What happened during segregation?
During segregation blacks were kept separate from whites. This is because blacks were not viewed as equal to the whites.
What role do large ion lithophile elements play in the formation of minerals and rocks?
Large ion lithophile elements, such as potassium and rubidium, play a significant role in the formation of minerals and rocks by influencing their chemical composition and stability. These elements are commonly incorporated into minerals during their formation, affecting their properties and behavior. Additionally, large ion lithophile elements can help geologists understand the processes that led to the formation of specific rocks and minerals.
What is Authigenesis?
•The formation of new minerals during diagenesis -Changing from an existing mineral to a new one -Replacing minerals with new phases introduced by fluid flow -Combination of the two
How do index minerals allow a scientist to understand the history of metamorphic rock?
Index minerals are specific minerals that form under particular temperature and pressure conditions during the metamorphic process. By identifying these minerals in metamorphic rocks, scientists can infer the metamorphic conditions the rock underwent, such as the depth and temperature of formation. This information helps reconstruct the geological history of the area, including tectonic processes and the thermal evolution of the crust. Thus, index minerals serve as key indicators of the metamorphic environment and the conditions present during rock formation.
What causes the separation of air over the wing during a stall?
The angle between the chord of the wing and the longitudinal axis of the airplance is too great.
The crystals of many metamorphic rocks are aligned in bands as a result of?
the application of pressure and heat during the rock's formation. This causes the minerals within the rock to reorganize and align themselves in parallel bands. The direction of the pressure determines the orientation of the bands in the metamorphic rock.
What is an arrangement of minerals in flat or wavy parallel bands?
This arrangement is known as foliation, commonly seen in metamorphic rocks where minerals align in layers due to pressure and temperature changes during their formation.
