Geology Test 6-10 Questions with 100%
Correct Answers | Verified | Updated (Actual
Exam) 2026 2027 Graded A+
Which of the following shows the different, generic divisions of
the geologic time scale in correct order of decreasing lengths of
time beginning with the longest interval and ending with the
shortest? - ✔✔ANSWER ✔✔-eon, era, period, epoch
We know the absolute age of the Moon from which one of the
following dating methods? - ✔✔ANSWER ✔✔-Radiometric
dating
Which type of unconformity has an erosional contact between
tilted, older strata (sedimentary rock) below the contact, and
horizontal, younger strata above the contact? See below for an
,illustration of this type of unconformity. - ✔✔ANSWER ✔✔-
Angular unconformity
What is so unique about the Cambrian Period at the beginning
of the Paleozoic Era? HInt: It has to do the so-called "Cambrian
Explosion". - ✔✔ANSWER ✔✔-An abrupt appearance of the
first abundant, multicellular, hard-part animals - representing
nearly all phyla - appear in the fossil rock record during that
period.
In the "Earth Revealed" geology video documentary #10 on
Geologic Time, the concept of geologic deep time was
discussed in the video, in terms of Earth's entire 4.6 billion year
history being compressed into a "year" of time.
Question: If Earth's entire geologic history was compressed into
a single year's worth of time, then at what time and day of that
year did humans make their first appearence on the planet
(based on absolute-dated fossil evidence)? - ✔✔ANSWER ✔✔-
December 31th at 11:20pm
Which principle type of earth material is used for radiometric-
technique ABSOLUTE age dating analyses? Hint: The material
has to have minerals that are of the same age as the rock itself.
- ✔✔ANSWER ✔✔-Igneous rocks
,The Earth's modern-day geologic timescale periods and period
divisions (like the Permian and Triassic periods and its period
boundary) were ORIGINALLY based solely upon which one of
the following criteria? - ✔✔ANSWER ✔✔-Relative dating using
index fossils
In the "Earth Revealed" geology video documentary #10 on
Geologic Time, the early pioneers in geologic dating were
discussed in the video.
Question: What is the name of the 18th century Scottish
geologist who established the fundamental principle of geology
termed "uniformitarianism" and the temporal aspect of
geologic processes? - ✔✔ANSWER ✔✔-James Hutton
Radiometric age analysis of a buried lava flow gives a
crystallization date of 20 million years. That means that the age
of the sedimentary bed that UNDERLIES it must have an age
that is _______. - ✔✔ANSWER ✔✔-Older- older than 20 million
years
The stratigraphic principle of Fossil Succession states what, in
terms of dating rocks? - ✔✔ANSWER ✔✔-Fossil assemblages
(groups of species) of a given time period are unique in relation
, to all other time periods. Thus, a rock containing a specific fossil
assemblage has a unique age and temporal position in the
geologic timescale. Additionally, all rocks having the same fossil
assemblage must be of the same age.
What is the age of Earth accepted by nearly all scientists today?
And what principle or method did they use to make this age
determination? (Note: pay careful attention to the billions and
millions!) - ✔✔ANSWER ✔✔-4.6 billion years. This age
determined by using the radioisotopic method.
The stratigraphic principle of "cross-cutting" is best used for the
relative dating which of the following geologic rocks and/or
structures? - ✔✔ANSWER ✔✔-Intrusions and faults
Using stratigraphic principles, place the lettered rock units and
structural elements - in the geologic cross section below - in
their proper relative order - from OLDEST to YOUNGEST.
Note that "A" is an igneous intrusion, "X" is a fault and "Y" is an
unconformity beneath layer "C". All the other layers are
sedimentary rocks. - ✔✔ANSWER ✔✔-Oldest -- H, G, F, E, D, X,
A, Y, C, B -- Youngest
Correct Answers | Verified | Updated (Actual
Exam) 2026 2027 Graded A+
Which of the following shows the different, generic divisions of
the geologic time scale in correct order of decreasing lengths of
time beginning with the longest interval and ending with the
shortest? - ✔✔ANSWER ✔✔-eon, era, period, epoch
We know the absolute age of the Moon from which one of the
following dating methods? - ✔✔ANSWER ✔✔-Radiometric
dating
Which type of unconformity has an erosional contact between
tilted, older strata (sedimentary rock) below the contact, and
horizontal, younger strata above the contact? See below for an
,illustration of this type of unconformity. - ✔✔ANSWER ✔✔-
Angular unconformity
What is so unique about the Cambrian Period at the beginning
of the Paleozoic Era? HInt: It has to do the so-called "Cambrian
Explosion". - ✔✔ANSWER ✔✔-An abrupt appearance of the
first abundant, multicellular, hard-part animals - representing
nearly all phyla - appear in the fossil rock record during that
period.
In the "Earth Revealed" geology video documentary #10 on
Geologic Time, the concept of geologic deep time was
discussed in the video, in terms of Earth's entire 4.6 billion year
history being compressed into a "year" of time.
Question: If Earth's entire geologic history was compressed into
a single year's worth of time, then at what time and day of that
year did humans make their first appearence on the planet
(based on absolute-dated fossil evidence)? - ✔✔ANSWER ✔✔-
December 31th at 11:20pm
Which principle type of earth material is used for radiometric-
technique ABSOLUTE age dating analyses? Hint: The material
has to have minerals that are of the same age as the rock itself.
- ✔✔ANSWER ✔✔-Igneous rocks
,The Earth's modern-day geologic timescale periods and period
divisions (like the Permian and Triassic periods and its period
boundary) were ORIGINALLY based solely upon which one of
the following criteria? - ✔✔ANSWER ✔✔-Relative dating using
index fossils
In the "Earth Revealed" geology video documentary #10 on
Geologic Time, the early pioneers in geologic dating were
discussed in the video.
Question: What is the name of the 18th century Scottish
geologist who established the fundamental principle of geology
termed "uniformitarianism" and the temporal aspect of
geologic processes? - ✔✔ANSWER ✔✔-James Hutton
Radiometric age analysis of a buried lava flow gives a
crystallization date of 20 million years. That means that the age
of the sedimentary bed that UNDERLIES it must have an age
that is _______. - ✔✔ANSWER ✔✔-Older- older than 20 million
years
The stratigraphic principle of Fossil Succession states what, in
terms of dating rocks? - ✔✔ANSWER ✔✔-Fossil assemblages
(groups of species) of a given time period are unique in relation
, to all other time periods. Thus, a rock containing a specific fossil
assemblage has a unique age and temporal position in the
geologic timescale. Additionally, all rocks having the same fossil
assemblage must be of the same age.
What is the age of Earth accepted by nearly all scientists today?
And what principle or method did they use to make this age
determination? (Note: pay careful attention to the billions and
millions!) - ✔✔ANSWER ✔✔-4.6 billion years. This age
determined by using the radioisotopic method.
The stratigraphic principle of "cross-cutting" is best used for the
relative dating which of the following geologic rocks and/or
structures? - ✔✔ANSWER ✔✔-Intrusions and faults
Using stratigraphic principles, place the lettered rock units and
structural elements - in the geologic cross section below - in
their proper relative order - from OLDEST to YOUNGEST.
Note that "A" is an igneous intrusion, "X" is a fault and "Y" is an
unconformity beneath layer "C". All the other layers are
sedimentary rocks. - ✔✔ANSWER ✔✔-Oldest -- H, G, F, E, D, X,
A, Y, C, B -- Youngest
