What are the characteristics of natural salt NaCl deposits quizlet?
What are the characteristics of natural salt (NaCl) deposits? a wedge-shaped zone of faults, folds, and metamorphosed rocks formed along the upper parts of a subduction zone as material is scraped off.
What is true of the difference between regional mountain ranges and local mountains?
What is true of the difference between regional mountain ranges and local mountains? Local mountains are small features and do not involve regionally thickened crust. Regional mountain ranges are typically very long and involve regionally thickened crust.
What is the main reason why the age of oldest rocks can vary from one part of a continent to another?
What is the main reason why the age of oldest rocks can vary from one part of a continent to another? Seafloor spreading rates cannot be used to reconstruct past continents' positions older than 180 million years.
Which letter is over the youngest oceanic crust?
30 Cards in this Set
| How did the Red Sea, shown between Arabia and Africa in this figure form? | Continental rifting followed by seafloor spreading |
|---|---|
| Where is subduction occurring on this map of South America? | B |
| On the accompanying figure, which letter is over the youngest oceanic crust? | D |
What causes the formation of offsets in the mid ocean ridge system quizlet?
– Offsets occur where two plates slide past each other. – Segments of a mid-ocean ridge are initially aligned. Transform faults form when different segments spread at different rates. – Offsets include both inactive and active segments.
Why are reefs located between 30o North and 30o south of the equator?
Why are reefs located between 30 degrees north and 30 degrees south of the equator? Clear water is present in this zone. Warm water is present in this zone. Geologists can learn about past environments and climates by collecting cylinder-shaped drill _______ from the seafloor.
What formed the Appalachian mountains?
The Appalachian Mountains formed from terrane accretion and the collision of Gondwanaland with ancient North America as the Iapetus Ocean closed.
How are mountain ranges formed?
Mountains form where two continental plates collide. Since both plates have a similar thickness and weight, neither one will sink under the other. Instead, they crumple and fold until the rocks are forced up to form a mountain range. As the plates continue to collide, mountains will get taller and taller.
What type of tectonic event formed the main structures in the Valley and ridge province of the Appalachian Mountains?
Continental collision in the late Paleozoic produced a fold and thrust belt in which Paleozoic sedimentary rocks of the Valley & Ridge were folded and transported westward along thrust faults. The Great Valley is underlain by a two-tier duplex in which the entire Cambrian and Ordovician rock sequence is repeated.
Where are the oldest rocks located?
Hudson Bay, Canada Bedrock along the northeast coast of Hudson Bay, Canada, has the oldest rock on Earth.
What were some of the technological advancements that allowed scientists to study the age of the sea floor?
Deep ocean drilling and radiometric dating in the late 1960s gave an accurate stratigraphy and precise date of the ocean floor. From studying the oxygen isotopes of the shells of microfossils in these cores, scientists were able to begin studying the Earth's past climates in a study known as paleoclimatology.
How did the Red Sea shown between Arabia and Africa form?
The Red Sea Rift was formed by the divergence between the African Plate and the Arabian Plate. The rift transitioned from a continental rift to an oceanic rift. Magnetic anomalies suggest that the spreading rate on either side of the Red Sea is about 1 cm/year.
Which of the following is a type of plate boundary where new seafloor is formed quizlet?
What are the different types of plate boundaries? Divergent- Divergent plates move apart and may be oceanic-oceanic or oceanic-continental. New seafloor is created and this is called seafloor spreading.
What feature is formed where the Pacific plate and Antarctic Plate slide past each other?
The south-eastern side is a divergent boundary with the Nazca Plate forming the East Pacific Rise. The southern side is a divergent boundary with the Antarctic Plate forming the Pacific–Antarctic Ridge.
Which of the following is not one of the three major regions of the ocean floor?
Which of the following is NOT one of the three major regions of the ocean floor? b. ocean basin floor. Which of the following is associated with down slope movements of dense sediment-rich water?
What process associated with mountain and basin formation may accompany ocean continent convergence?
What processes associated with mountain and basin formation may accompany ocean-continent convergence? … Different ages of terranes may be accreted onto continents and newer-aged sedimentary rocks or volcanic rocks are deposited on top of older rocks.
How were the Appalachian Mountains formed quizlet?
The Appalachian Mountains formed when Africa and North America collided during the assembly of Pangaea. The Himalayas are among the youngest mountains on Earth today.
When did the Rocky Mountains form?
Starting 75 million years ago and continuing through the Cenozoic era (65-2.6 Ma), the Laramide Orogeny (mountain-building event) began. This process uplifted the modern Rocky Mountains, and was soon followed by extensive volcanism ash falls, and mudflows, which left behind igneous rocks in the Never Summer Range.
Which of the following is not a mountain range?
The correct answer is an option (c). Explanation: The Prairies are not mountains. They are grasslands of the North American continent. The Rockies are a mountain range of North America, the Andes are a mountain range of South America and the Apennines are a mountain range of Europe.
What are the 3 ways mountains form?
In truth, there are three ways in which mountains are formed, which correspond to the types of mountains in question. These are known as volcanic, fold and block mountains.
Which of the following is not considered a result of the movement of tectonic plates?
The correct answer is option 3 i.e Ocean current.
Which tectonic process has formed the mountain belts along the coasts of Alaska and British Columbia?
– The mountain ranges that dominate the coasts of Alaska and British Columbia were formed as a sequence of terranes was smeared onto the margin of North America when the intervening oceanic crust was subducted.
Is Earth a rock?
It's firm and hard like other rock, but it's actually flowing very slowly, about as slowly as your fingernails grow. The outer core is a liquid layer, made mostly of iron and nickel, that moves around the inner core. This motion causes Earth to act like a giant magnet.
How old is the Earth?
4.543 billion yearsEarth / Age
Which of these were important scientific developments for the formation of plate tectonic theory?
In particular, four major scientific developments spurred the formulation of the plate-tectonics theory: (1) demonstration of the ruggedness and youth of the ocean floor; (2) confirmation of repeated reversals of the Earth magnetic field in the geologic past; (3) emergence of the seafloor-spreading hypothesis and …
Which of the following technological advances for exploration was most important for the European explorers Why?
Astrolabe. The astrolabe was one of the most important navigation tools and was used by many European explorers, including Columbus and Magellan.
What type of plate boundary is formed between Arabian and African plates?
The type of tectonic plate boundary that occurs between the African Plate and the Arabian Plate is a divergent plate boundary.
What is the tectonic setting of the Red Sea?
The Red Sea Rift is a spreading center between two tectonic plates, the African Plate and the Arabian Plate. It extends from the Dead Sea Transform fault system, and ends at an intersection with the Aden Ridge and the East African Rift, forming the Afar Triple Junction in the Afar Depression of the Horn of Africa.
Which of the following is a type of plate boundary where new seafloor is formed?
Seafloor spreading occurs at divergent plate boundaries. As tectonic plates slowly move away from each other, heat from the mantle's convection currents makes the crust more plastic and less dense.
Which of the following mountain ranges are examples of continental arcs quizlet?
Which of the following mountain ranges are examples of continental arcs? Andes and Cascades.