PHYSICAL UNIVERSE(LL)-W/ACCESS >CUSTOM<
16th Edition
ISBN: 9781259974755
Author: KRAUSKOPF
Publisher: MCG CUSTOM
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Textbook Question
Chapter 16, Problem 14E
When continental drift was proposed almost a century ago, it was assumed that the continents move through soft ocean floors. Why is this hypothesis no longer considered valid? How does continental drift actually occur?
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Chapter 16 Solutions
PHYSICAL UNIVERSE(LL)-W/ACCESS >CUSTOM<
Ch. 16 - A crack in the earths crust along which movement...Ch. 16 - A long, narrow bay with an irregular outline, such...Ch. 16 - The rugged character of mountain landscapes is...Ch. 16 - The ancient supercontinents Laurasia and Gondwana...Ch. 16 - A mountain range that was not once part of the...Ch. 16 - North America, Greenland, and most of Eurasia once...Ch. 16 - The shell of rigid rock that makes up the earths...Ch. 16 - Compared with the earths crust under the oceans,...Ch. 16 - Compared with the continents, the ocean floors are...Ch. 16 - The ocean floor near a midocean ridge a. has the...
Ch. 16 - According to the hypothesis of seafloor spreading,...Ch. 16 - The number of large plates into which the...Ch. 16 - In the course of 100 years, a lithospheric plate...Ch. 16 - A region where an edge of a lithospheric plate...Ch. 16 - Most volcanoes are found a. where continental...Ch. 16 - The Indian subcontinent a. was always part of Asia...Ch. 16 - Iceland was once a. a coral reef b. magma that...Ch. 16 - The San Andreas Fault in California is the result...Ch. 16 - If the processes of plate tectonics were to stop...Ch. 16 - The theory of evolution is supported by which one...Ch. 16 - An uneven surface on which a horizontal upper bed...Ch. 16 - Prob. 22MCCh. 16 - Prob. 23MCCh. 16 - Fossils are least likely to be found in a....Ch. 16 - Conditions for the preservation of fossils are...Ch. 16 - The division of geologic time into eras and...Ch. 16 - The earth was formed a. in 4004 B.C. b. about 2...Ch. 16 - Prob. 28MCCh. 16 - Precambrian rocks are a. never found b. extremely...Ch. 16 - Living things have been present on the earth a....Ch. 16 - The oxygen in the atmosphere a. was present since...Ch. 16 - Ancient geologic processes as revealed in...Ch. 16 - Coal is composed of a. petrified wood b. buried...Ch. 16 - A bed of coal usually implies that the region was...Ch. 16 - Prob. 35MCCh. 16 - Amphibians, fishes, and marine invertebrates were...Ch. 16 - The dinosaurs were which one or more of the...Ch. 16 - Dinosaurs were abundant in the a. Cenozoic b....Ch. 16 - Prob. 39MCCh. 16 - The leading explanation for the disappearance of...Ch. 16 - The ancestors of the birds were a. reptiles b....Ch. 16 - During the Cenozoic Era a. Laurasia and Gondwana...Ch. 16 - Pangaea broke up into Laurasia and Gondwana, which...Ch. 16 - The line of descent of humans broke away from that...Ch. 16 - The Cenozoic Era represents a period a. of almost...Ch. 16 - During the most recent ice age a. there was a...Ch. 16 - What landscape features are associated with...Ch. 16 - List all the evidence you can for each of the...Ch. 16 - What geologic process is chiefly responsible for...Ch. 16 - Deposits of igneous rocks are found intruded in...Ch. 16 - Why is it believed that the region where the Rocky...Ch. 16 - What kind of biological evidence supports the...Ch. 16 - The eastern coast of South America is a good fit...Ch. 16 - (a) Where was the Tethys Sea located? (b) Are...Ch. 16 - Which of todays continents were once part of...Ch. 16 - Which is denser, the granitic rock of the...Ch. 16 - (a) What is the difference between the earths...Ch. 16 - North America, Greenland, and Eurasia fit quite...Ch. 16 - How do the ages of the ocean floors compare with...Ch. 16 - When continental drift was proposed almost a...Ch. 16 - The energy source of erosional processes is the...Ch. 16 - Where do subduction zones occur? What happens at...Ch. 16 - The Himalayas are the highest mountain range on...Ch. 16 - How does the origin of the Himalayas differ from...Ch. 16 - Which are younger, the Rocky Mountains or the...Ch. 16 - Is the Atlantic Ocean becoming narrower or wider?...Ch. 16 - The San Andreas Fault in California is a...Ch. 16 - In what geological zones are most volcanoes found?Ch. 16 - Which plate collisions are responsible for...Ch. 16 - The distance between the continental shelves of...Ch. 16 - The oldest sediments found on the floor of the...Ch. 16 - In Fig. 16-47, beds A to F consist of sedimentary...Ch. 16 - (a) What is an unconformity? (b) If one is shown...Ch. 16 - What is a fault? If one is shown in Fig. 16-47,...Ch. 16 - What is the basis of the radiocarbon dating...Ch. 16 - The half-life of rubidium-87 is 47 billion years,...Ch. 16 - The half-life of potassium-40 is 1.3 billion...Ch. 16 - Why are fossils still useful in dating rock...Ch. 16 - List as many different kinds of fossils as you...Ch. 16 - Why are most fossils found in beds that were once...Ch. 16 - What is the basis for the division of geologic...Ch. 16 - What is the basis for the division of geologic...Ch. 16 - What is the oldest division of geologic time? In...Ch. 16 - During what divisions of geologic time have living...Ch. 16 - The earths history is sometimes divided into two...Ch. 16 - The early atmosphere of the earth probably...Ch. 16 - Precambrian rocks include sedimentary, igneous,...Ch. 16 - Precambrian rocks are exposed over a large part of...Ch. 16 - What conspicuous difference is there between...Ch. 16 - What are the chief kinds of organisms that have...Ch. 16 - Paleozoic sedimentary rocks derived from marine...Ch. 16 - Which of the following are found in Paleozoic rock...Ch. 16 - Why is it believed that large parts of the United...Ch. 16 - Under what circumstances is coal formed?Ch. 16 - What is believed to be the origin of petroleum? Of...Ch. 16 - What are some of the chief differences between...Ch. 16 - What kind of animals were the dinosaurs? Were they...Ch. 16 - What is believed to be the reason or reasons for...Ch. 16 - From what type of animal did birds evolve? Are...Ch. 16 - About 200 million years ago todays continents were...Ch. 16 - The same reptiles were present on all continents...Ch. 16 - In rocks of what era or eras would you expect to...Ch. 16 - What were the ice ages? When did they occur?Ch. 16 - The Scandinavian landmass of Norway and Sweden has...Ch. 16 - Minnesota has a great many shallow lakes. How do...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- Explain the mechanism behind continental drift.arrow_forwardExplain how continental crust and oceanic crust are like icebergs in water.arrow_forwardWith the information from Exercise 8.25, you can calculate the average age of the ocean floor. First, find the total area of the ocean floor (equal to about 60% of the surface area of Earth). Then compare this with the area created (or destroyed) each year. The average lifetime is the ratio of these numbers: the total area of ocean crust compared to the amount created (or destroyed) each year.arrow_forward
- If you wanted to live where the chances of a destructive earthquake were small, would you pick a location near a fault zone, near a mid ocean ridge, near a subduction zone, or on a volcanic island such as Hawaii? What are the relative risks of earthquakes at each of these locations?arrow_forwardAlthough he did not present a mechanism, what were the key points of Alfred Wegener’s proposal for the concept of continental drift?arrow_forwardHow is the root cause of earthquakes in Hawaii different from earthquakes in Southern California?arrow_forward
- Do you think partial melting will occur if the pressure is high in the asthenosphere?arrow_forwardThe Grinnell Glacier in Glacier National Park had a surface area of 1,020,009 square meters in 1966. Its area was 615,454 square meters in 2005. The 2005 surface area is what percentage of the 1966 surface area?arrow_forward
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