answersLogoWhite

0


Best Answer

The magnetism in basaltic rock on the ocean floor suggests that the continents have been moving away from each other. The earth regularly undergoes magnetic shifts in which north becomes south and vice versa. As the magma rising through the diverging ocean floor cools into basaltic rock, it takes on the magnetic properties of the earth at that moment. In this way we can tell which way the continents are moving and that they were likely joined in the past. On top of this, the general shape of the continents also suggests this supercontinent as well as the distribution of species.

User Avatar

Wiki User

โˆ™ 2011-05-26 06:53:32
This answer is:
User Avatar
Study guides

Science

20 cards

Who is known as the first African American scientist

What is Luis Alvarez's cultural background

What was Benjamin Banneker's ethnic background

Which scientist used mathematical knowledge to calculate the exact measurement of the meter

โžก๏ธ
See all cards
3.81
โ˜†โ˜…โ˜†โ˜…โ˜†โ˜…โ˜†โ˜…โ˜†โ˜…
502 Reviews

Add your answer:

Earn +20 pts
Q: How magnetism in rocks suggest that the continents were once joined?
Write your answer...
Submit
Still have questions?
magnify glass
imp
Continue Learning about General Science

What evidence is there that the continents were once connected?

The continent pieces fit together as if they where a puzzle. If you look at South America and Africa it seems that they could have once been connected.Fossil evidence in different countries implies that they may have once been joined. The fossils of large birds are the same implying that there was a common ancestor to large flightless modern birds that are separated on different continents.Mid ocean ridges are spreading the ocean floors apart. The age of the rocks on the bottom of the ocean shows that the plates that the continents are on are moving apart.Finally, the most compelling evidence is to do with the magnetism of the rocks. As the lava cools the ferromagnetic material in some rocks lines up with the Earth's magnetic poles. When these rocks move they are no longer lined up to the Earth's current magnetic poles, they produce anomalies in the magnetic readings. These rocks reveal their latitude of where they were when they cooled.


How does the earth's magnetic field provide evidence for plate tectonics?

Iron gains magnetism at a certain temperature known as the curie point. at this point Iron rich minerals align with the magnetic polls. Today Iron minerals have been found in older rocks pointing in a variety of directions and since our polls do not move this provided evidence that the Continents containing those minerals have moved and after lining up these magnetic rocks with others from the same time they all correlate with Continental drift and plate tech-tonics.


How do fossils indicate that the continents have moved with time?

Similar fossils and rocks are found on widely separated continents.FROM,A smart girl named,ISABELLA JULI-ASS RAMIREZ!


How are sediments joined together to form rocks?

Settlement and compaction. As particles (sediments) are dumped, lets say, at the bottom of a lake, they will begin to settle and eventually harden into a sedimentary rock.


What are two sources of dissolved substances in the ocean?

Chemical weathering of rocks on the continents is one source of elements found in seawater. The second major source of elements found in seawater is from the Earth's interior.

Related questions

Is paleomagnetism the study of ancient magnetism?

Paleomagnetism is the study of the magnetism of ancient rocks. In principle, it was the study of ancient magnetism


How can you see magnetism in rocks?

Magnetic rocks have varying degrees of power. The magnetism could be visible by its pull on a few iron filings, or in the fact that it picks them all up.


Is magnetism a rock?

No. It is not a rock. However there are rocks that are magnetic, have magnetism. Magnetism is one-half of the fundamental force called electro-magnetism. That's why we can cause some things to move using magnets.


What is the study of the past magnetism in rocks known as?

This is known as paleomagnetism.


How are seafloor spreading and continental drift supported by paleomagnetic data?

When a rock is formed, rocks have a preserved imprint of the changes in the earths magnetism over the eons of geological time thus shows that the continents are drifiting.


How looking at the magnetism of certain rocks helps support the idea that the continents have moved and changed over time.?

Most of the the rocks on the edge of the continent all match equally, and some rocks are magnetic North and others are magnetic South. However; this fact only proves that the Earth's landmasses have changed over time.


Explain how looking at the magnetism of certain rocks helps support the idea that the continents have moved and changed over time?

Most of the the rocks on the edge of the continent all match equally, and some rocks are magnetic North and others are magnetic South. However; this fact only proves that the Earth's landmasses have changed over time.


Two meanings of lithosphere?

Continents and Rocks.


What kind of rocks are the continents made of?

GRANITE is the answer.


What are rocks that exhibit magnetism that is opposite to the current magnetic field?

magnetic fields


How do rocks get energy?

Through light, gravity, velocity, and magnetism to name a few.


How are rocks near continents different from rocks found near centers of seafloor spreading?

Rocks near continents(on the margins of oceanic basins) are generally older and rocks near a center of sea floor spreading are younger

People also asked