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8_murik_8 [283]
3 years ago
10

Explain the origin of the rock cleavage seen in slate and the

Geography
1 answer:
zysi [14]3 years ago
5 0

Answer:

Cleavage of a mineral is defined as the direction along which the mineral breaks over the flat mineral surface. It is directly dependent on the mineral's crystallographic structure.

Slaty cleavage refers to the cleavage that is commonly found in the low grade metamorphic rock slate. Here, the fine grained minerals are so closely spaced and the lines of weakness are all parallel to each other, that allows the minerals to break in fine and thin layers. During the time of formation of slate, the smaller fractures are formed due to the increasing pressure. When groundwater moves through these fractures it forms a weak zone due to which these slaty cleavage forms.

When the rocks undergoes deformation and changes in the pressure and temperature condition then the cleavages are formed on the mineral's surface. The calcite contains rhombohedral cleavage are considered to be the perfect cleavage. Whereas the cleavage in amphibole is uneven and comprised of two directions that intersect each other at 56° and 124°.

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Which observation about the Mid-Atlantic Ridge region provides the best evidence that the seafloor has been spreading for millio
SSSSS [86.1K]

Answer:

D. Seafloor bedrock is younger near the ridge and older farther away.

Explanation:

In a divergence boundary oceanic plates or continental plates move apart. The plates moves apart causing an uprising of molten magma to form a new crust. The divergent movement of plate is very prevalent in the oceanic plates.

The plates in the oceanic crust moves apart due to the up welling of aesthenosphere materials . These aesthenosphere materials(molten magma) are introduce to the ocean floor through the mid oceanic ridge . As this materials are introduced through cracks and fissures, the plates continue to drift apart. The molten magma later solidified to form a new crust closer to the oceanic ridge.  This is why sea floor bedrock closer to the ridge is younger as new rocks are formed here. But as one move farther away from the ridge the rocks become older. This phenomenon provide ample evidence that the seafloor is spreading. The older rocks found father away from the ridge proves the seafloor has been spreading given way for new rocks closer to the ridge.  

7 0
3 years ago
You can tell the continents by and
Crank

Answer:

You can learn it through a song or through an order

Explanation:

<h2>From largest to smallest ;</h2>

Asia

Africa

North America

South America

Antarctica

Europe

Australia.

<h2>Or from smallest to biggest ;</h2>

Australia.

Europe

Antarctica

South America

North America

Africa

Asia

i hope it helps :)

5 0
3 years ago
In which of the following tectonic plate settings are volcanoes typically NOT found? a. Mid-ocean ridges b. Continental rifts c.
saul85 [17]

Answer:

Answer is D. Transform faults.

Explanation:

The transform fault is situation where the tectonic plates slide past one another. It can also be described as a conservative boundaries because it does lead to the creation or destruction of crust. But , the build up of pressure between two plates along the faults can produce earthquakes.

In this case, volcanoes settings can not be found in the transform faults because there is absence of volcanoes vent, which will allow the passage of the molten rock to the surface.

7 0
3 years ago
Read 2 more answers
Which of the following terms describes days when the sun's rays directly hit the Tropic of Cancer and the Tropic of Capricorn?
marta [7]
<h2>Answer:</h2>

<u>c. Solstice</u> describes days when sun's rays directly hit Tropic of Cancer and Tropic of Capricorn.

<h2>Explanation:</h2>

The solstices occur due to the declination of the Earth's orbital movement around the sun. During this declination, the axial tilt is 23.5°. Furthermore, solstice's occurrence is during time the sun's direction is overhead the moon.

In Northern hemisphere, the declination is towards Tropic of Cancer with the axial tilt of 23.5°N. It occurs on June 20 & 22 while in the south the normal period of occurrence is between December 20 and December 23. In the south, the solar declination hits Tropic of Capricorn at 23.5°S.

4 0
3 years ago
Read 2 more answers
Plz help me...
Leokris [45]

Answer:

The answer would be B

Explanation:

Looking at the map(s), we can see that 1911 Britain has less white and yellow than 1701 Britain, but more orange and red, this means that Britain is way more densely populated in 1911 than in 1701.

Hope this helps :)

4 0
2 years ago
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