Historical Geology
Lab #3 Pre-lab Name
_________________________
Read the Introductory text for
Exercises 4 and 7 and answer the following 10 questions.
____ 1. Rock bodies identified on the basis of lithologic
character and stratigraphic position without regard to time are
___________________
a.
chronostratigraphic units c.
time divisions
b.
lithostratigraphic units
____ 2. A Series is an example of a ____________________
a.
chronostratigraphic unit c.
time division
b.
lithostratigraphic unit
____ 3. A Formation is an example of a ____________________
a.
chronostratigraphic unit c.
time division
b.
lithostratigraphic unit
____ 4. A Period is an example of a ____________________
a.
chronostratigraphic unit c.
time division
b.
lithostratigraphic unit
____ 5. Rocks from the same lithostratigraphic unit are
always the same age.
a.
true b.
false
____ 6. The vertical scale on a seismic profile is
___________.
a.
depth c.
geologic time
b.
rock velocity d.
two-way travel time
____ 7. Which geophysical logs reflect the porosity of the
rock?
a.
electrical resistivity c.
natural gamma radiation
b.
self-potential d.
sonic velocity
____ 8. What type of rock has the highest gamma radiation
signal?
a.
clean quartz sandstones c.
feldpathic sandstones
b.
limestones d.
organic-rich shales
____ 9. Magnetic stratigraphy is an example of ___________.
a.
lithostratigraphic correlation b.
chronostratigraphic correlation.
____ 10. List three examples of
discontinuities that could refract seismic waves.
________________________
________________________
_________________________