The Coeur d'Alene Mining District in Silver Valley, ID is known for its large lead deposits of the mineral galena (PbS). Galena is one of the few common minerals with a metallic luster that has a distinctive cleavage (cleavage is how a mineral breaks or parts along preexisting planes of weakness). Cleavage is described by the number of unique directions of cleavage planes and the angle between those planes. Which of the following best describes galena’s cleavage?

a. three directions at ~90°
b. three directions not at ~90°
c. two directions at ~90°
d. two directions not at ~90°

Answers

Answer 1

Answer:

a. three directions at ~90°

Explanation:

Galena is known for its presence in all types of rocks (igneous, metamorphic and sedimentary rocks). It is predominantly ore of lead which has a chemical configuration of PbS and lead sulfide. Also, newly severed chunks of galena display excellent cleavage in three directions at ninety degrees.

Hence, in this case, the correct answer is "galena’s cleavage is best described as three directions at ~90°"


Related Questions

Suppose a line segment whose endpoints are T(x1,y1) and U(x2,y2) is reflected over y=x to create T′U′− . The coordinates of the image are T′(−4, 3) and U'(1, 7) . What are the values of x1 , x2 , y1 , and y2 ?

Answers

Answer:

T'(3, -4) U'(7, 1)

Explanation:

(x, y) ---> (y, x)

T'(y1, x1) = (-4, 3) ----> T(3, -4)

U'(x2, y2)= (1, 7) -------> U(7,1)

Find the distance between each pair of points
(-5.2, 7) and (3,- 4)

Answers

Answer:

13.72units

Explanation:

Given parameters:

   Coordinates of the two points  =  (-5.2, 7) and (3,- 4)

Unknown:

Distance between the two points = ?

Solution:

To find the distance between two points, we use the mathematical expression below;

   D = [tex]\sqrt{(x_{2}-x_{1} )^{2} + (y_{2} - y_{1} )^{2} }[/tex]

 From the given coordinates;

        x₁  = -5.2      x₂  = 3

        y₁ = 7             y₂ = -4

Now; input the parameters and solve;

  D  = [tex]\sqrt{[3-(-5.2)]^{2} + (-4 -7)^{2} }[/tex] = [tex]\sqrt{67.24 + 121}[/tex] = 13.72units

The distance between the two points is 13.72units

Definition of faction(politics)

Answers

a small organized dissenting group within a larger one, especially in politics.

Answer:

A political faction is a group of individuals within a larger entity, such as a political party, a trade union or other group, or simply a political climate, united by a particular common political purpose that differs in some respect to the rest of the entity.

what is an impact of river rejuvenation on farming activities​?

Answers

Explanation:

In geomorphology a river is said to be rejuvenated when it is eroding the landscape in response to a lowering of its base level. The process is often a result of a sudden fall in sea level or the rise of land. The disturbance enables a rise in the river's potential energy, increasing its riverbed erosion rate. The erosion occurs as a means for the river to adjust to its new base level

India is facing its worst water crisis in four decades. At least 54 percent of the sub-continent has turned into a water-stressed dust bowl with many rivers rapidly drying up. Experts opine that by 2025, the country will be facing an acute water crisis if no preventive measures are taken today.

To mitigate the water crisis, Gurudev Sri Sri Ravi Shankar has inspired The Art of Living community to revive lost rivers in various parts of India and other water bodies such as ponds, wells, canals and temple tanks.

The River Rejuvenation Project, which started in 2013 with the aim to provide a long-term and lasting solution, has reviving 43 rivers in four states (Maharashtra, Karnataka, Tamil Nadu and Kerala), benefitting 5,084 villages and 7 million + people benefited.

With meticulous planning and consistent efforts, results have come in: several rivers and other smaller bodies in these states have started flowing once again.

An impact of river rejuvenation is that it leads to increased produce due to the fact that it supplies farmlands with water.

What is river rejuvenation?

This is a situation where there is an eroding of water due to the fact that the water in the rivers have become higher than their base level.

When this is the case they help to provide farmlands with water which are useful to plants.

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What are some causes and effects of disIn Westside Community Schools v. Mergens, the Supreme Court ruled in favor of the __________, stating that it was a violation of __________.
A.
principal . . . church and state
B.
students . . . their First Amendment rights
C.
students . . . their patriotic rights
D.
principal . . . school policy



Please select the best answer from the choices provided


A
B
C
Dease?

Answers

Answer:

c

Explanation:

the designating factors of a climate include

Answers

Answer: The climate of any particular place is influenced by many interacting and designing factors. For example, latitude, elevation, nearby water, ocean currents, topography, vegetation, and prevailing winds. Hope this helps you!

Explanation:

why is southern hemisphere referred to as "Water hemisphere"?​

Answers

Answer:

because the southern hemisphere has significantly more ocean and less land; water heats up and cools down more slowly than land.

9. What natural resources can be found in
the European nations located on Great
Northern European Plain?
10. How did these resources impact develop-
ment?

Answers

Answer:

wood, soil, water, fish, natural gas, coal, and iron

what is the value of g?
g = 75
g = 80
g = 100
g = 105

Answers

Answer:

75≤g≤105

Explanation:

the answer must be 75≤g≤105 i think so

Answer:

D) g = 105

Explanation:

just did it on edge 2020

With increasing distance from a mid-ocean ridge, the age of oceanic crust a. decreases. b. stays constant. c. varies randomly. d. increases.

Answers

Answer:

i think its d

Explanation:

With increasing distance from a mid-ocean ridge, the age of oceanic crust increases. Thus, option (d) is correct.

What is ocean?

The greatest area on earth is referred to as the "ocean." The ocean's 71% slat water has a light blue appearance. The motion of water waves is the ocean. Magnesium, calcium, and chlorine are abundant in the ocean. The ocean covers the large surface area of the Earth.

The oceanic crust is the high - level network of the ocean and is also known as tectonic plates. The age, breadth, and density of the oceanic crust increased on the mid-ocean ridge. Approximately 120 million years ago in the age of the oldest oceanic crust. The age of earth's lithosphere is roughly 3.2 billion years.

As a result, the significance of the oceanic crust are the aforementioned. Therefore, option (d) is correct.

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Which statement below is not an example of how tectonic forces affect the environment?

Answers

Answer:

Explanation:

Shifting of these tectonic plates result in the creation of the volcanic eruptions increases the degree of carbon dioxide (CO2) and sulphur dioxide (SO2) in the atmosphere that also leads to a rise in the temperature levels. On the contrary, if the move is insignificant, the temperature levels record a fall.

geography question!! please help

Answers

Mexico’s brain drain will have a huge impact on the country. Because so many people are fleeing the country there won’t be as much money being brought in to the economy because there aren’t as many people buying things and working which adds to the economy.

Explain the sequence of culture events that occur as people anticipate an eruption​

Answers

Answer:

A volcano eruption gives warning signs before eruption. Before a volcanic eruption takes place , the magma rises towards the earth surface causing breaking of rocks . As more pressure is applied it pushes up, and causes the rocks around it to vibrate. This results in earthquakes . Earthquakes cause  damage to buildings but not  like the big tectonic quakes.

Large igneous provinces (LIPs)
A. erupt only high-viscosity magma and are therefore localized but very thick.
B. occur only along continental margins.
C. represent special events in the Earth's history that may have been caused by plume activity.
D. are places where huge amounts of felsic magma have been erupted or intruded.

Answers

I’m sure it is c hope that helped

The names of two civilizations in the Central America Region before the Spanish conquest.

Answers

Answer:

The Maya and Aztec

Explanation:

Answer:

Answers include:

Explanation:

AztecIncaMayanOlmec

To name some high profile civilizations. There are many more correct answers, but those are the best known.

what is the term for the disintegration and decomposition of rock at or near earth's surface
a. earthquake
b. erosion
c. mass wasting
d. weathering​

Answers

Answer:

Your answer is- d. weathering

Explanation:

Hope this helps you

Crown me as brainliest:)

What sorts of weather will you experience as a warm front passes over you?

Answers

Answer:

Explanation:

Warm fronts often bring stormy weather as the warm air mass at the surface rises above the cool air mass, making clouds and storms. Warm fronts move more slowly than cold fronts because it is more difficult for the warm air to push the cold, dense air across the Earth's surface.

TRUST TRUST ITS ITSassssss

Taiga includes the largest contiguous forests on the planet and make up about _____ percent of all of Earth's forests.

Answers

Answer:about 30%

Explanation:

Taiga first is also known as boreal forest,it is the world's largest land biome this accumulate to about 30% coverage of all earth forest.

It covers a wide percentage of land

this range from North America,northern contiguous United States, Eurasia, Russia, Norway, Estonia, Scottish Highlands, some lowland/coastal areas of Iceland, northern Kazakhstan, northern Mongolia, and northern Japan.

The trees grown, temperature and length of the growing season are not the same across the word it varies. In North America spruce is majorly found in tiaga while Scandinavian and Finnish consists of spruce, pines and birch.

The wave structure of the polar front and associated upper-tropospheric jet stream is caused by
_____a. surface temperature contrasts between oceans and continents.
_____b. large-scale mountain ranges.
_____c. transient weather disturbances (mid-latitude low pressure systems).
_____d. (all of the above)

Answers

D. All of the above

Information about absolute location can be used to find that location from?

Answers

based on a fixed point on earth. The most common way is to identify the location using coordinates such as latitude and longitude.

What does an organism's phenotype describe?
1.) the allele combination for a trait
2.) the physical appearance of a trait
3.) the number of alleles on a gene
4.) the number of different traits inherited

Answers

Answer:

2.) the physical appearance of a trait

Explanation:

An organism phenotype describes the physical appearance of a trait. Phenotypes are an outward expression of the genetic makeup of an organism.

Phenotype is usually conditioned by the environment in which an organism finds itself. Examples of phenotypes are the appearance of an organism, color, height, shape, etc. They are the observable traits of an organism. The genotype which is the genetic constituent of an organism controls the phenotypes.

Answer:

b

Explanation:

I need help and answers plz someone help me

Answers

Answer:

1. 130

2A. South.

2B. the contour heights are decreasing.

3A. 50.

3B. 60.

4A. Between X and Y.

4B. The contour lines are close to each other.

define food insecurity​

Answers

Food insecurity is a measure of the availability of food and individuals ability to access it.

The Georgia legislature nullified the Yazoo Act because ? A. Georgians were happy with its terms. B. the act gave land to all residents of Georgia. C. Georgians did not like the terms of the act. D. the act had been passed with the aid of bribery.

Answers

Answer:

Im not really sure but here is an explanation ?

Explanation:

Yazoo land fraud, in U.S. history, scheme by which Georgia legislators were bribed in 1795 to sell most of the land now making up the state of Mississippi (then a part of Georgia's western claims) to four land companies for the sum of $500,000, far below its potential market value. News of the Yazoo Act and the dealing

Answer:

D. the act had been passed with the aid of bribery.

Explanation:

I took the test.

Troubleshooting differs from diagnosis in that

Answers

Answer:

]troubleshooting focuses on how to fix the problem

Explanation:

Answer: troubleshooting focuses on how to fix the problem

Explanation: took the quiz

Women in Maasai society are responsible for all of the following jobs except __________. A. building houses B. collecting water and firewood C. milking cows D. building kraals

Answers

Answer:

d

Explanation:

Answer:

D.building kraals

Which statement places events during the Space Race in the corect order from the earliest to the most recent?
A. NASA was established, US satelite Explorer launched, first man walked on the moon first man orbited the Earth
B. first man walked on the moon, first man orbited the Earth, NASA was established, US satellite Explorer launched
C. US satellite Explorer launched, NASA was established, first man orbited the Earth first man walked on the moon
D. first man orbited the Earth, first man walked on the moon, US satellite Explorer launched, NASA was established​

Answers

Answer:

C

Explanation:

US satellite Explorer launched, NASA was established, first man orbited the Earth first man walked on the moon

Answer:

c

Explanation: first man walks on the moon

Which force keeps the planets from floating off into space?
O Earth's gravity
O the Sun's gravity
O the moon's gravity
O Milky Way's gravity​

Answers

Answer:

The Sun's gravity

Explanation:

The suns gravity keeps a constant pull on the planets keeping them in orbit

The Sun's gravity, of the force, keeps the planets from floating off into space. Thus, option (b) is correct.

What is planet?

The term “planet” refers to a large celestial body that orbits around the sun, but the sun is a fixed point in place. The planets are different sizes, as smaller planets are Earth, Mercury, Mars, and Venus. The larger gas giant planets are Jupiter, Uranus, Neptune, and Saturn.

The Sun's gravity plays a major role in the planets' tendency to drift towards space. The orbits are established and maintained by the combined effects of the sun's gravity, that of the planets, and inertia. The Sun and Planets are separated by Gravity, yet are Pulled Together by it. The high level was caused by the heat of the sun. Principal cause: gravity.

As a result, the Sun's gravity, of the force, keeps the planets from floating off into space. Therefore, option (b) is correct.

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what is the radius of the earth

Answers

The radius of the earth is 3,958.8 mi
i believe it’s 3,958.8 mi

What is the hypothesis in this conditional statement?

If it is the holiday season, then the post office is crowded.

1. It is the holiday season

2. The post office is crowded

Answers

The hypothesis is #1 - if it is the holiday season (:

Mark brainliest if you wanna help a girl out lol
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