Zircon (ZrSiO4) forms in magma as it cools into igneous rock. It is also useful for numerical dating.

a. If you walk on a modern New Jersey beach, then you will walk on some zircon sand grains. Yet if you determine the numerical age of the zircons, it does not indicate a modern age (zero years) for the beach. Why?
b. Suggest a rule that geologists should follow when they date rocks based on the radiometric ages of crystals inside the rocks.

Answers

Answer 1

Answer:

Zircon is essential element in the formation of igneous ricks.

Explanation:

Zircon crystal commonly grow in rocks and are very small in size. Zircon forms magma ad the lavas as it cools and thus is useful for absolute dating but does not indicate modern age for the beach. Due to the structure of the crystal, as it solidifies in magma. Once make sure that the crystal formed inside the ricks are formed at the same time as the rock itself. As the ricks are formed in different environments just beneath the surface of the earth.

Related Questions

NEED HELPP PLSSSSSSSSSSSS!!!!!

Answers

Answer:

1st option

I hope it is helpful and follow me for more good answer

The length of a part on model helicopter is 8.5cm;the scale of model is 1:100,000.calculate the real length of the helicopter part in meter

Answers

9514 1404 393

Answer:

  8500 m

Explanation:

At a scale of 1 : 100,000, the real part will be 100,000 × 8.5 cm = 8500 m.

_____

Additional comment

I've not seen or heard of any helicopter that has any parts that are as long as 8.5 kilometers (5.28 miles).

What is the current state of Communist China in the 21st century?

Answers

Answer:

China’s Communist Party turns a century old this July, a milestone that Beijing is celebrating with a crescendo of fireworks, theatrics and a fervent campaign to honor its revolutionary past.

The party has often lurched between tragedy and triumph between its birth as an underground movement and its current dominance over the world’s most populous nation. It seized power in 1949, and its early decades in government were tumultuous, with Mao Zedong launching radical purges and a disastrous industrial program that led to one of the deadliest famines in history.

Mao’s death in 1976 precipitated political and economic changes under Deng Xiaoping that would transform an impoverished nation into a global economic powerhouse.

The Supreme Court supported which of the
following in arguments over the Indian
Removal Act?
A. Cherokee
B. National Government
C. State of Georgia

Answers

Answer:

A. Cherokee

Explanation:

the Court heard two cases dealing with conflicts between the state of Georgia and the Cherokee Nation. Although the Court ruled in favor of the Cherokee, Georgia ignored the decision and in 1838 the Cherokee were forcibly relocated to present-day Oklahoma.

The particular animals of a given geographic region are called its __________.
A.
flora
B.
fauna
C.
packs
D.
herds

Please select the best answer from the choices provided.

A
B
C
D

Answers

Answer:

it must be fauna coz flora is for plants

Answer:

b) fauna

Explanation:

just took the test

How do the final two sentences of the section "The
Flow Of History" contribute to the article?

Answers

Answer:

History plays an important role in the development of a country. For example, the United States would be a different country today if France or Spain had ruled us instead of Great Britain. We might have a different form of government. ... When a country is involved in wars, it will impact the country.

please give brainliest

Explanation:

Discuss the advantages of relative location for commercial activities

Answers

Answer:

Relative location shows how things are related by technology, distance or culture.

Explanation:

The advantages of relative location for commercial activities are: forming a sense of community by getting to know your customers better, having repeat customers who are more likely to be loyal because they live in close proximity, the ability to advertise locally which can attract new customers, you can reward local customers which can increase loyalty, and can contribute to the local community by benefiting customers and local nonprofits.  

Answer:Relative location for commercial activities not only cost effective but also targets a larger audience. When you refer to a place using relative location, more number of people are able to relate to it. New customers are attracted when relative location is used for commercial activities

Explanation:

Nicobar island as well as _______ island belong to the geographical of Asia​

Answers

Answer:

Andaman

is right answer I hope it's helpful

*********ANDAMAN*************

.

.i don't want points

what is contour line

Answers

Explanation:

a line on a map joining points of equal height above or below sea level.

Answer:

Hey mate.....

Explanation:

This is ur answer....

A contour line is a line drawn on a topographic map to indicate ground elevation or depression. A contour interval is the vertical distance or difference in elevation between contour lines. Index contours are bold or thicker lines that appear at every fifth contour line.

Hope it helps!

Brainliest pls!

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2. Given 4(-x + 4) = 12 Prove x = 1​

Answers

Solve the equation

[tex]\\ \sf \longmapsto 4(-x+4)=12[/tex]

[tex]\\ \sf \longmapsto -4x+16=12[/tex]

[tex]\\ \sf \longmapsto -4x=12-16[/tex]

[tex]\\ \sf \longmapsto -4x=-4[/tex]

[tex]\\ \sf \longmapsto x=\dfrac{-4}{-4}[/tex]

[tex]\\ \sf \longmapsto x=1[/tex]

[tex]\large\bf{\orange{ \implies}} \: \tt \: \: 4 \: ( - x \: + \: 4) \: = \: 12[/tex]

[tex]\large\bf{\orange{ \implies}} \: \tt \: \: - 4x \: + \: 16 \: = \: 12[/tex]

[tex]\large\bf{\orange{ \implies}} \: \tt \: \: - 4x \: = \: 12 \: - 16[/tex]

[tex]\large\bf{\orange{ \implies}} \: \tt \: \: - 4x \: = \: - 4[/tex]

[tex]\large\bf{\orange{ \implies}} \: \tt \: \:x \: = \: \frac{ \cancel{- 4} \: \: ^{1} }{ \cancel{- 4}} [/tex]

[tex]\large\bf{\orange{ \implies}} \: \bf \: \:x \: = \: 1[/tex]

[tex]\Large\underbrace{\textrm{{{\color{blue}{Hence , Proved}}}}}[/tex]

The Mt. St Helens eruption in Washington state m 1980 measured 5 on the volcanic exclusivity index (VEI). Only 57 people died from the Mt. St Helens since most people were warned to evacuate the area prior to the event, Four years later, in 1985, del Ruiz in Colombia erupted. While only measuring 3 on the VEI, the eruption resulted in 25,000 deaths when unsuspecting residents of local towns were overrun by fast-moving lahars. Which of the following statements about volcano-related deaths best fit the information given in the paragraph?
a. Volcanic eruptions often kill thousands of people.
b. The death toll from volcanic eruptions do not always correlate to exclusivity, and can be affected by human actions before and after the eruption.
c. Most volcano-related deaths occur from lahars.
d. The death toll from a volcanic eruption is directly related to its volcanic exclusivity index (VEl).

Answers

Answer:

b. The death toll from volcanic eruptions do not always correlate to exclusivity, and can be affected by human actions before and after the eruption.

Explanation:

Many volcanic eruptions don't kill anyone. This is because most active volcanoes are well-known to local residents, who give them appropriate respect.

Lahars are deadly, but so are pyroclastic flows, and releases of ash and/or poison gases. The two deadliest eruptions in recorded history caused death by starvation and tsunami.

The point of the paragraph was that the VEI was not directly related to the number of deaths.

mối quan hệ giữa quá trình nội lực và ngoại lực

Answers

Answer:

The importance of categorizing a force as being either internal or external is related to the ability of that type of force to change an object's total mechanical energy when it does work upon an object. When net work is done upon an object by an external force, the total mechanical energy (KE + PE) of that object is changed.

Explanation:

in vietamnise/

Tầm quan trọng của việc phân loại một lực là bên trong hoặc bên ngoài có liên quan đến khả năng của loại lực đó để thay đổi tổng năng lượng cơ học của một vật thể khi nó hoạt động trên một vật thể. Khi công việc ròng được thực hiện trên một đối tượng bởi một ngoại lực, tổng năng lượng cơ học (KE + PE) của đối tượng đó được thay đổi.

silicon and _______ stay in the the outer cells pls tell me fast​

Answers

Answer:

Oxygen

Explanation:

The earth has been divided into three major categories crust, mantle, and core which are further segregated into sub-parts. Since the crust is the outermost layer of the shell, the outer crust of the earth consists of a combination of silicon and oxygen in the majority followed by some percentage of other metals as well. The percentage of Oxygen includes nearly 50% i.e. 46.6% followed by 27.7% of Silicon and the other 25.3 % includes aluminum, iron, sodium, magnesium, etc. Thus, 'oxygen' is the correct answer.

Pyroclastic material includes lava that hardens in the air during eruption.

a. True
b. False

Answers

True, a common cause of Pyroclastic flows is gassed expelled from a volcano during an eruption as well as dense, fast moving solidified lava pieces.
True Pyroclastic flows contain a high-density mix of hot lava blocks, pumice, ash and volcanic gas. They move at very high speed down volcanic slopes, typically following valleys.

Considering what you have learned about the coriolis effect, briefly describe the coriolis effect on the atmosphere of the planet venus, which is about the same size as earth but has a period of rotation of 244 earth days

Answers

Answer:

In simple words, The Coriolis Force on Venus is exceedingly mild due to all the planet's sluggish rotation. The Coriolis Influence on the movement of the Earth 's atmospheric is extremely significant, generating continent-sized swirling of cloud formations that are readily visible from space when the Earth rotates on its axis roughly once every 24 hours.

Describe a very morning on way to school​

Answers

I would be all ready in my clothes and make sure I have all the materials I need for the day!!!

All of the following statements are true regarding non-government organizations EXCEPT:

Answers

Answer:

The answer is; C

Explanation:

Non-governmental institutions are independent of governments hence do not identify themselves with any government   or state. They are mainly involved in humanitarian works, and societal building roles especially in less developed societies. Their workings are not intended for any profits and are usually funded through donations.

(Missing!) Background Knowledge:

Assuming that the following statements are these -

A. Non-government organizations aid in human interests.

B. Non-government organizations are companies that are not for profit.

C. Non-government organizations identify with a specific government.

D. Non-government organizations are also referred to as relief organizations.

Which line segment has the same measure as ST?

RX
TX
SR
XS

Answers

Answer:

SR

Explanation:

Line Segments RX and TC have the same measurement, and has a right angle at point X, this proves that SR is equal to the measurement of ST.

Underline the best answers.
1.09) The (Equator, Prime Meridian, Latitude) runs north to south through
Greenwich, England.

Answers

What exactly here is the question

3. When harmful gases, such as sulfur dioxide and nitrogen oxide, react with water in the
atmosphere, they can produce
4. The agent of erosion involved in stream erosion is

Answers

Answer:

3. when harmful gases,such as sulfur dioxide and nitrogen oxide,react with water In the atmosphere,they can produce acidic rain.

4. the agent of erosion involved in stream erosion is water.

I hope this helps

which city is located near 40 N 89 W

Answers

Answer: Bahamas

Explanation:

Question 7
Which of the following is true of skeletal muscle tissue?
A
Each cell has a single nucleus.
B
A muscle cell is composed of hundreds of muscle fibers.
Askeletal muscle fiber typically contains a sarcolemma, t-tubules, and myofibrils.
D
Skeletal muscle cells have the same shape as smooth muscle cells.

Answers

Answer:

A skeletal muscle fiber typically contains a sarcolemma,  t-tubules, and myofibrils.

Explanation:

I hope this helps

The correct answer to the given question is C. Because of the following reasons

Skeletal muscle tissue is multi nucleated, cylindrical fiber which are soft and fragile.

Skeletal muscle fiber is surrounded by a plasma membrane called sarcolemma.

They provide pathways for passage of blood vessels and nerves.

These tissues are found in muscles which is directly attached to the skeleton.

The correct answer is C.

Learn more at https://brainly.com/question/20760438

Which of the following best describes the relationship between water
regulation and globalization?
A. The countries that regulate water are causing conflict with those that do not
B. Water should be regulated for tax income.
C. With a growing population, the world needs clean water.
D. Water is a renewable resource, freely available to all countries.

Answers

Answer:

With a growing population,the world needs clean water

where is kalsubai peak????????​

Answers

Answer:

Kalsubai peak is situated in Maharashtra, India (south Asia) in Western Ghats.

→ You can see on the map that Kalsubai peak is marked with a red point.

Regional Geography lays emphasis on the distinctiveness of a particular place and the characteristics or activities that make up that location. With specific examples from Ghana and knowledge acquired in the Regional Geography of Ghana course so far, discuss the above statement.


Answers

Answer:

Ghana is a West African country in Africa, along the Gulf of Guinea, just a few degrees north of the equator.

Ghana encompasses plains, low hills, rivers, Lake Volta, the world's largest artificial lake, Dodi Island and Bobowasi Island on the south Atlantic Ocean coast of Ghana.[1] Ghana can be divided into four different geographical ecoregions. The coastline is mostly a low, sandy shore backed by plains and scrub and intersected by several rivers and streams. The northern part of Ghana features high plains.[2] South-west and south-central Ghana is made up of a forested plateau region consisting of the Ashanti uplands and the Kwahu Plateau. The hilly Akwapim-Togo ranges are found along Ghana's eastern international border.[3]

The Volta Basin takes up most of south-central Ghana and Ghana's highest point is Mount Afadja which is 885 m (2,904 ft) and is found in the Akwapim-Togo ranges.[4][5] The climate is tropical and the eastern coastal belt is warm and comparatively dry, the south-west corner of Ghana is hot and humid, and the north of Ghana is warm and wet.[2] Lake Volta, the world's largest artificial lake, extends through small portions of south-eastern Ghana and many tributary rivers such as the Oti and Afram rivers flow into it.[6]

Explanation:

The northernmost part of Ghana is Pulmakong and the southernmost part of Ghana is Cape three points near Axim. Ghana lies between latitudes 4° and 12°N.[7] South Ghana contains evergreen and semi-deciduous forests consisting of trees such as mahogany, odum, ebony and it also contains much of Ghana's oil palms and mangroves with shea trees, baobabs and acacias found in the northern part of Ghana.[7]

European settlers and Americans transformed the Great Plains from
to
A. fields of corn; fields of grass
B. natural grassland; fields of corn
C. desert; farms

D. ancient farms; fruit orchards
SUBMIT

Answers

Answer:

The answer is B,  natural grassland; fields of corn

Explanation:

hope this helps!

short note on Indian desert​

Answers

Also known as Great Indian Desert, this arid region covers about 92,200 square miles and is the seventh largest desert in the world. ... Although it borders the Indus to the west, Thar is a dry subtropical zone because the monsoons that carry the rain to the rest of India bypass this region.

Hi all, can you solve this please,

Answers

Answer:

amon gus

Explanation:

What rock type is best described as a felsic volcanic rock that is lightweight, light-colored and appears to consist of hard, solid white-gray material with some embedded angular, broken larger grains of crystalline minerals like quartz or feldspar

Answers

Answer:

Rock Key i think

Explanation:

The felsic volcanic rocks are igneous rocks and are rich in feldspar and quartz. They are rich in iron and magnesium, Have silicate mineral-like magma and rocks.

The Felsic combines feldspar and silica. Most of the volcanic rocks are extensively formed such as Rhyolite and is glassy and light grey rock. Rhyolite magmas form highly viscous lava. Rhyolite can be commonly found along the convergent plate boundary. Predominantly Quartz, sanidine.

Learn more about the rock type is best described as a felsic volcanic rock that is lightweight.

brainly.in/question/28515903.

Need help asap will rate 5 stars!!!!

Answers

Answer:

not sure how to answer its hard to understand

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