What process is evident at oceanic trenches?

What process is evident at oceanic trenches? Sinking of oceanic lithosphere into the mantle at a subduction zone.

What was the name of the fossil flora that grew on Pangea during the Late Paleozoic?

The calamites. Late Palaeozoic horsetails, known as calamites, were one of the dominant types of plant during the Carboniferous and Permian periods.

Which scientist argued forcefully for continental drift in the early part of the 20th century?

B) Alfred Wegener 5) The ________ is an example of an active, continent-continent collision.

What type of plate boundary is usually associated with pull apart rift zones?

What are pull apart rift zones associated with?

Question	Answer
Pull-apart rift zones are generally associated with a ________ plate boundary.	divergent
The temperature below which magnetic material can retain a permanent magnetization is called the ________.	Curie point

•Feb 1, 2022

What are the evidences of plate movement found in your constructed Pangaea?

There is variety of evidence that supports the claims that plate tectonics accounts for (1) the distribution of fossils on different continents, (2) the occurrence of earthquakes, and (3) continental and ocean floor features including mountains, volcanoes, faults, and trenches.

How is a deep ocean trench formed?

In particular, ocean trenches are a feature of convergent plate boundaries, where two or more tectonic plates meet. At many convergent plate boundaries, dense lithosphere melts or slides beneath less-dense lithosphere in a process called subduction, creating a trench.

What piece of evidence is considered the strongest evidence for Pangea?

Finally, the strongest evidence for the existence of Pangaea is something called paleomagnetism. Some rocks have minerals inside ofthem that are magnetic, and when the rock forms those magnetic minerals will line up and point to the North Pole.

What evidence do scientists use to support the continental drift?

In the early part of the 20th century, scientists began to put together evidence that the continents could move around on Earth's surface. The evidence for continental drift included the fit of the continents; the distribution of ancient fossils, rocks, and mountain ranges; and the locations of ancient climatic zones.

What evidence indicated scientists that the continents were once connected?

Wegener's first piece of evidence was that the coastlines of some continents fit together like pieces of a jigsaw puzzle. People noticed the similarities in the coastlines of South America and Africa on the first world maps, and some suggested the continents had been ripped apart (3).

How can the age of rocks in the seafloor prove that the seafloor is actually spreading starting from the ridge?

The age, density, and thickness of oceanic crust increases with distance from the mid-ocean ridge. Geomagnetic ReversalsThe magnetism of mid-ocean ridges helped scientists first identify the process of seafloor spreading in the early 20th century.

What type of convergent plate boundary triggers the formation of active volcanoes as magma rises beneath the surface?

Subduction zones Subduction zones have a lot of intense earthquakes and volcanic eruptions. The subducting plate causes melting in the mantle above the plate. The magma rises and erupts, creating volcanoes.

What do you think a divergent constructive boundary is how do plates interact with each other?

Divergent boundaries are areas where plates move away from each other, forming either mid-ocean ridges or rift valleys. These are also known as constructive boundaries. Convergent boundaries are areas where plates move toward each other and collide. These are also known as compressional or destructive boundaries.

What are the evidences that supports the movement of the plates?

Evidence from fossils, glaciers, and complementary coastlines helps reveal how the plates once fit together. Fossils tell us when and where plants and animals once existed. Some life "rode" on diverging plates, became isolated, and evolved into new species.

What evidence did scientists use for continental drift?

The four pieces of evidence for the continental drift include continents fitting together like a puzzle, scattering ancient fossils, rocks, mountain ranges, and the old climatic zones' locations.

How was Mariana Trench discovered?

In 1875, the trench was discovered by the HMS Challenger using recently-invented sounding equipment during a global circumnavigation, according to the website for DeepSea Challenge (opens in new tab), Cameron's 2012 solo expedition into the trench. In 1951, the trench was sounded again by HMS Challenger II.

What happens at a deep ocean trench?

Trenches are formed by subduction, a geophysical process in which two or more of Earth's tectonic plates converge and the older, denser plate is pushed beneath the lighter plate and deep into the mantle, causing the seafloor and outermost crust (the lithosphere) to bend and form a steep, V-shaped depression.

What was some evidence that supported Pangea?

The rock formations of eastern North America, Western Europe, and northwestern Africa were later found to have a common origin, and they overlapped in time with the presence of Gondwanaland. Together, these discoveries supported the existence of Pangea.

What are 3 pieces of evidence for Pangea?

They based their idea of continental drift on several lines of evidence: fit of the continents, paleoclimate indicators, truncated geologic features, and fossils.

What was Wegener’s evidence for his theory?

Wegener supported his theory by demonstrating the biological and geological similarities between continents. South America and Africa contain fossils of animals found only on those two continents, with corresponding geographic ranges.

What are evidence of seafloor spreading?

Several types of evidence from the oceans supported Hess's theory of sea-floor spreading-evidence from molten material, magnetic stripes, and drilling samples. This evidence also led sci- entists to look again at Wegener's theory of continental drift.

What are some examples of evidence that suggests that some continents were once joined and have since separated?

Fossil Evidence Fossils of similar types of plants and animals in rocks of a similar age have been found on the shores of different continents, suggesting that the continents were once joined. For example, fossils of Mesosaurus, a freshwater reptile, have been found both in Brazil and western Africa.

What was probably the first evidence that led some to suspect the continents were once connected?

What evidence in rocks supports the theory of sea floor spreading?

Supporting Evidence for Seafloor Spreading First, samples of the deep ocean floor show that basaltic oceanic crust and overlying sediment become progressively younger as the mid-ocean ridge is approached, and the sediment cover is thinner near the ridge.

How were scientists able to compare the age of rocks present in the ocean floor?

Scientists can determine the age of the seafloor by examining the changing magnetic field of our planet. Every once in a while, the currents in the liquid core, which create the Earth's magnetic field, reverse themselves: it is called a geomagnetic reversal. This has happened many times throughout Earth's history.

Which plate boundary and movement commonly create non volcanic mountains explain how non volcanic mountains are created by plate tectonics?

Answer and Explanation: The convergent boundary is one where the impact of the two plates towards one another results in the formation of non-volcanic mountains.

Why do geological activities such as earthquake volcanism and mountain formation happen to be confined on certain places around the globe?

Geologic processes such as plate tectonics impact the entire surface of the planet and have major influences on the location of natural hazards like earthquakes and volcanoes. So far, we have only studied large scale patterns in plate tectonics.

How does transform fault plate boundary differ from divergent and convergent plate boundary?

Divergent boundaries — where new crust is generated as the plates pull away from each other. Convergent boundaries — where crust is destroyed as one plate dives under another. Transform boundaries — where crust is neither produced nor destroyed as the plates slide horizontally past each other.

Which hypothesis do many scientists think may explain the great force needed to move the plates?

The theory of continental drift is most associated with the scientist Alfred Wegener. In the early 20th century, Wegener published a paper explaining his theory that the continental landmasses were “drifting” across the Earth, sometimes plowing through oceans and into each other.

What type of evidence for the plate tectonic theory is provided when scientist discovered that the magnetic field reverses polarity?

This further provided evidence for plate tectonics. More evidence came when scientist examined the sea floor and saw that there were reversals of polarity of Earth's magnetic field that was in a striped pattern. The strips of polarity reversal were mirror images on each side of the mid- ocean ridge.