Ravenous rocks question Flashcards

1
Q

List

Types of grain

A
  • Interlocking:When the grains fit together like a jigsaw puzzles, making them impernable.Made using crystals
  • Rounded:When the grains, leave air pockets in the rocks, making them porous.Made using sediments
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2
Q

List

Rock types

A
  • Igenous
  • Sedimentary
  • Metamorphic
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3
Q

Grain type

Igenous

A

Interlocking grain

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4
Q

How are igenous rocks formed

A

Via volcanic material crystalising/cooling

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5
Q

Where are igneous rocks formed

A

Near volcanoes/In the lithiosphere

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6
Q

List

Igenous Rock cycle

A
  1. Existing rocks are moltenified in lava or magma
  2. The molten rock mix with other molten rocks(making sedimentary-igneous rock), but some can still stay seperate due to their densisty
  3. The molten rock eventually rises to the top of the mantle, or erupts above the crust, settling and eventually coolong
  4. Depending on whether it’s above or below crust, and how fast it cools, the sediments will crystalise (long cooling time=bigger crystals vice versa)
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7
Q

Type of grain

Sedimentary

A

Rounded

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8
Q

How are sedimentary rocks formed

A

Via other rocks types, compresssing into new ones

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9
Q

Where are sedimentary rocks formed

A

Near river or water sources

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10
Q

List

Sedimentary Rock cycle

A
  1. Existing rocks are weathered away by physical, chemical or biological means
  2. The rock pieces are transported away from their location by human or physical means.Both of these steps collectivity are known as erosion
  3. The rocks pieces are eventually depoisited somewhere new
  4. Over time, more rocks pices settle in the same place, compressing eachother as well as other substances, cementing as well
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11
Q

Type of grain

Metamorphic

A

Interlocking

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12
Q

How are metamorphic rocks formed

A

When one or serval rocks is exposed to high pressure and heat over milllions of years, eventualy turning into new rocks

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13
Q

Where are metamorphic rocks formed

A

Deep in the crust

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14
Q

List

Compaction metamorphism (heat+pressure)

A
  1. Existing rock is compacted by sediments/other substances.This puts pressure on the below rocks
  2. As well as this, the weight , causes the rock into the ground closer to the mantle.This aslo put heat on the below rocks.
  3. Eventually the intense heat and pressure, results in strong metamorphism, making the new rock, partillary resisant to heat and pressure
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15
Q

List

Intrusive magma/Extruisive lava metamorphism (heat)

A
  1. Sometimes, the mantle comes to the existing rock, either in the form of intrusive magma, or (rarley)extruisive lava.
  2. This only puts intense heat of the rock, causing weak metamorphism, and making rock only partillarly resisant to heat
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16
Q

List

Tectonic metamorphism (Pressure)

A
  1. Existing rock can be found inbetween converging tectonic plates coming together.
  2. This only puts intense pressure on the rock, causing weak metamorphism, and making the rock only partillarly resisant to pressure
17
Q

List

Full Metamorphic/rock cycle

A

1.Existing rocks goes through one of the metamorphisms, and eventually:
* Get too close to the mantle due to compaction/extruisve lava/convergent trench
* Get erupted up by the intrusive magma/convergent volcano
* Get crumbled to intense pressure in convergent mountains, and hopefully, due to gravity, make it to the mantle, or to the bottom of the mountain to become sedimentary rock

2.All of these result in the rock melting and becoming intrusive/extrusive igneous rock

3.Now, if the rock is intrusive, it’ll be recycled until, it ends as an extrusive, in which it will be weathered down, into the sedimentary cycle.And if compacted enough will go through metamorphism, esle will have to wait for a another metamorphism*

Note that the other two metamorphisms can happen at any time in cycle.

Now, of course you’ve got to remember , that nature isn’t perfect, and some rocks, will not always stay in the loop, due to human/physical activities.ber that new rocks, could join back, via human or physical means, in what is known as relooping