Question 1

Slabs of descending plate that break away may descend eventually to a maximum depth within the Earth of the

Accepted Answer

A)  base of the asthenosphere. 
B)  core-mantle boundary. 
C)  upper part of the outer core. 
D)  inner core. 
A)  base of the asthenosphere. 
B)  core-mantle boundary. 
C)  upper part of the outer core. 
D)  inner core.

Question 2

Select the evidence NOT cited by Alexander Du Toit from the list below regarding evidences that have been cited in support of the former existence of Gondwanaland.

Accepted Answer

A)  Age and distribution of Mesosaurus in Brazil and South Africa 
B)  Trans-Atlantic matching regional trends of rock deformation and mountain belts 
C)  Occurrence of Glossopteris beyond South America, South Africa, India, and Antarctica 
D)  Age and orientation of glacial scour features in South America and elsewhere 
A)  Age and distribution of Mesosaurus in Brazil and South Africa 
B)  Trans-Atlantic matching regional trends of rock deformation and mountain belts 
C)  Occurrence of Glossopteris beyond South America, South Africa, India, and Antarctica 
D)  Age and orientation of glacial scour features in South America and elsewhere

Question 3

The sinking of the downgoing slab that is attached to the larger crustal plate causes

Accepted Answer

A)  transform faults to form between plates. 
B)  convective motion in the asthenosphere. 
C)  dragging down of the rest of the plate. 
D)  the plate to be pushed apart in two opposite directions. 
A)  transform faults to form between plates. 
B)  convective motion in the asthenosphere. 
C)  dragging down of the rest of the plate. 
D)  the plate to be pushed apart in two opposite directions.

Question 4

Strong support for Hess's concept of widening seafloors came in the 1960s when it was recognized that the pattern of Late Cenozoic magnetic reversals determined in terrestrial rocks was also evident also in rock of the seafloor in the form of

Accepted Answer

A)  guyots and seamounts, which tended to cluster around mid-ocean ridges. 
B)  symmetrical patterns of magnetic striping surrounding mid-ocean ridges. 
C)  normal magnetization of mid-ocean ridges and reverse magnetization of other seafloor. 
D)  a constant rate of seafloor spreading throughout the long span of geological time. 
A)  guyots and seamounts, which tended to cluster around mid-ocean ridges. 
B)  symmetrical patterns of magnetic striping surrounding mid-ocean ridges. 
C)  normal magnetization of mid-ocean ridges and reverse magnetization of other seafloor. 
D)  a constant rate of seafloor spreading throughout the long span of geological time.

Question 5

The Gondwana sequence of Carboniferous tillites and interglacial coals, Permian dark shales, Triassic dune deposits, and Jurassic lava flows is best preserved in

Accepted Answer

A)  Africa. 
B)  Brazil. 
C)  Antarctica. 
D)  India. 
A)  Africa. 
B)  Brazil. 
C)  Antarctica. 
D)  India.

Question 6

Lystrosaurus is an extinct, heavy-set, herbivorous animal with beak-like jaws that played a role in support of the contention that __________ was part of Gondwanaland.

Accepted Answer

A)  Africa 
B)  Brazil 
C)  Antarctica 
D)  India 
A)  Africa 
B)  Brazil 
C)  Antarctica 
D)  India

Question 7

Before plate tectonics was accepted, some geologists invoked the concept of __________ to explain the similarities of some fossil plants and animals between and among continents, which were separated by oceans.

Accepted Answer

A)  repositioning 
B)  continental drift 
C)  ancient land bridges 
D)  corridors of felsic rock 
A)  repositioning 
B)  continental drift 
C)  ancient land bridges 
D)  corridors of felsic rock

Question 8

Studies of paleomagnetism are focused on

Accepted Answer

A)  previous positions of Earth's magnetic pole. 
B)  the long-term stability of Earth's magnetic field. 
C)  magnetization of ancient rocks at the time of their formation. 
D)  the formation of guyots and seamounts. 
A)  previous positions of Earth's magnetic pole. 
B)  the long-term stability of Earth's magnetic field. 
C)  magnetization of ancient rocks at the time of their formation. 
D)  the formation of guyots and seamounts.

Question 9

The difference in age between the northern Hawaiian island (Kauai) and the southern island (Hawaii) is at least __________ million years.

Accepted Answer

A)  5.6 
B)  4.6 
C)  3.6 
D)  2.6 
A)  5.6 
B)  4.6 
C)  3.6 
D)  2.6

Question 10

In Hess's concept of plate tectonic movement, continental rifts were explained as the location of

Accepted Answer

A)  former seamounts and guyots. 
B)  upwelling limbs of two adjacent convective cells in the mantle. 
C)  newly formed crust. 
D)  a descending conveyor belt-like feature. 
A)  former seamounts and guyots. 
B)  upwelling limbs of two adjacent convective cells in the mantle. 
C)  newly formed crust. 
D)  a descending conveyor belt-like feature.

Slabs of descending plate that break away may descend eventually to a maximum depth within the Earth of the

Select the evidence NOT cited by Alexander Du Toit from the list below regarding evidences that have been cited in support of the former existence of Gondwanaland.

The sinking of the downgoing slab that is attached to the larger crustal plate causes

Strong support for Hess's concept of widening seafloors came in the 1960s when it was recognized that the pattern of Late Cenozoic magnetic reversals determined in terrestrial rocks was also evident also in rock of the seafloor in the form of

The Gondwana sequence of Carboniferous tillites and interglacial coals, Permian dark shales, Triassic dune deposits, and Jurassic lava flows is best preserved in

Lystrosaurus is an extinct, heavy-set, herbivorous animal with beak-like jaws that played a role in support of the contention that __________ was part of Gondwanaland.

Before plate tectonics was accepted, some geologists invoked the concept of __________ to explain the similarities of some fossil plants and animals between and among continents, which were separated by oceans.

Studies of paleomagnetism are focused on

The difference in age between the northern Hawaiian island (Kauai) and the southern island (Hawaii) is at least __________ million years.

In Hess's concept of plate tectonic movement, continental rifts were explained as the location of

Earth As a System

Rock-Forming Minerals and Rocks

The Diversity of Life

Environments and Life

Sedimentary Environments

Correlation and Dating of the Rock Record

Evolution and the Fossil Record

Continental Tectonics and Mountain Chains

Major Geochemical Cycles

The Hadean and Archean Eons of Precambrian Time

The Hadean and Archean Eons of Precambrian Time

The Early Paleozoic World

The Middle Paleozoic World

The Late Paleozoic World

The Early Mesozoic ERA

The Cretaceous World

The Paleogene World

The Late Cenozoic World Before the Holocene

The Retreat of Glaciers and the Holocene

Filters

Exam 8: The Theory of Plate Tectonics

Slabs of descending plate that break away may descend eventually to a maximum depth within the Earth of the

Select the evidence NOT cited by Alexander Du Toit from the list below regarding evidences that have been cited in support of the former existence of Gondwanaland.

The sinking of the downgoing slab that is attached to the larger crustal plate causes

Strong support for Hess's concept of widening seafloors came in the 1960s when it was recognized that the pattern of Late Cenozoic magnetic reversals determined in terrestrial rocks was also evident also in rock of the seafloor in the form of

The Gondwana sequence of Carboniferous tillites and interglacial coals, Permian dark shales, Triassic dune deposits, and Jurassic lava flows is best preserved in

Lystrosaurus is an extinct, heavy-set, herbivorous animal with beak-like jaws that played a role in support of the contention that __________ was part of Gondwanaland.

Before plate tectonics was accepted, some geologists invoked the concept of __________ to explain the similarities of some fossil plants and animals between and among continents, which were separated by oceans.

Studies of paleomagnetism are focused on

The difference in age between the northern Hawaiian island (Kauai) and the southern island (Hawaii) is at least __________ million years.

In Hess's concept of plate tectonic movement, continental rifts were explained as the location of

Earth As a System

Rock-Forming Minerals and Rocks

The Diversity of Life

Environments and Life

Sedimentary Environments

Correlation and Dating of the Rock Record

Evolution and the Fossil Record

Continental Tectonics and Mountain Chains

Major Geochemical Cycles

The Hadean and Archean Eons of Precambrian Time

The Hadean and Archean Eons of Precambrian Time

The Early Paleozoic World

The Middle Paleozoic World

The Late Paleozoic World

The Early Mesozoic ERA

The Cretaceous World

The Paleogene World

The Late Cenozoic World Before the Holocene

The Retreat of Glaciers and the Holocene

Filters