ASBOG Practice Quiz with Accurate
Solutions
Which geologic law explains the relative ages of rocks with respect to one another in a
map or cross section? - ANSWER-Principle of Initial Horizontality
Law of Superposition
Law of Cross-cutting Relationship
Surface exposure, in a temperate environment, of aluminum silicate minerals such as
feldspar would result in the development of which of the following clay minerals? -
ANSWER-Montmorillonite
What geologic condition would produce slow drainage within the cone of depression of
an unconfined aquifer? - ANSWER-Glacial drift
What type of slope failure would you expect to find in a well-cemented conglomerate
overlying a shale in an area of high ground water levels? - ANSWER-Translational slide
Rotational landslide - ANSWER-the downward and outward movement of a mass on top
of a concave upward failure surface
When constructing an isopach map you ... - ANSWER-contouring the thickness of a bed
Under low pH conditions... - ANSWER-*Cyanide and sulfide are more toxic to fish
*Ammonia is less toxic to fish
*Acid mine drainage conditions exit.
A good index fossil is characterized by - ANSWER-a restricted stratigraphic range and a
wide geographic range
What would be the most logical engineering geologic classification of a till using the
USCS? - ANSWER-GM - GC
In the process of natural gas production, what is the purpose of injecting sand? -
ANSWER-It keeps fractures open
Aerial photographs that were shot an an elevation of 3000' and using a focal length of
6". What is the scale of the map? - ANSWER-6 = 3000 -> 1 = 500
Gossan or "rust' is formed at the surface as a result of hydration of iron oxides during
natural weathering and/or alteration processes in areas that are underlain by valuable
, mineralization of metal sulfides. What technique is particularly suited for investigating
these types of ore bodies? - ANSWER-Landsat remote sensing
An area with a collection of closed depressions, some of which are full of water, resulted
from what? - ANSWER-*Collapse of coal mine
*Collapse of rock over an underground cavity in limestone
*A large landslide in an area underlain by clayey soils
MTBE - ANSWER-Methyl Tertiary Butyl Ether
Finding MTBE source in an unconfined aquifer - ANSWER-GIS
Trilobites are important to the dating of rocks b/w the Cambrian and the Permian b/c -
ANSWER-Their presence defines the lower limit of the Cambrian Period and Paleozoic
Era.
Generate a series of maps providing geologic features, delineating map coverage of
investigations/reports done in the area. One million acres. What scale of maps would be
appropriate for the presentation? - ANSWER-Small-scale maps
In an area of limited surface outcrops, is a large overturned anticline composed of an
incompetent bed bounded by two competent beds. How would you determine which
limb is overturned? - ANSWER-Examine drag folding within the incompetent bed
Drag Faults - ANSWER-occur in conjunction with faults, and they represent the bending
of rock before it breaks
What would be the proper stratigraphic reference for the formally name Kaibab
limestone formation which was deposited during the end of the Permian? - ANSWER-
Kaibab Limestone (Late Permian)
What happens in an oxidation-reduction reaction? - ANSWER-Electrons are transferred
b/w chemical species, changing the oxidation states
Soils described as a CH would be _______ - ANSWER-High plasticity clays
Geologic map 1:24000 the outcrop of a geologic unit measures 0.4" perpendicular to
strike. How many feet wide is the outcrop? - ANSWER-24000/12 = 2000
2000 X 0.4 = 800'
Coal rank is based on the degree of metamorphism (coalification) and is based on heat
value, fixed carbon and volatile matter in the coal. With increased rank one would
expect - ANSWER-a higher density and higher specific gravity
A circular feature found on a geologic map in an area of moderate relief could result
from which of the following? - ANSWER-*a structural dome
Solutions
Which geologic law explains the relative ages of rocks with respect to one another in a
map or cross section? - ANSWER-Principle of Initial Horizontality
Law of Superposition
Law of Cross-cutting Relationship
Surface exposure, in a temperate environment, of aluminum silicate minerals such as
feldspar would result in the development of which of the following clay minerals? -
ANSWER-Montmorillonite
What geologic condition would produce slow drainage within the cone of depression of
an unconfined aquifer? - ANSWER-Glacial drift
What type of slope failure would you expect to find in a well-cemented conglomerate
overlying a shale in an area of high ground water levels? - ANSWER-Translational slide
Rotational landslide - ANSWER-the downward and outward movement of a mass on top
of a concave upward failure surface
When constructing an isopach map you ... - ANSWER-contouring the thickness of a bed
Under low pH conditions... - ANSWER-*Cyanide and sulfide are more toxic to fish
*Ammonia is less toxic to fish
*Acid mine drainage conditions exit.
A good index fossil is characterized by - ANSWER-a restricted stratigraphic range and a
wide geographic range
What would be the most logical engineering geologic classification of a till using the
USCS? - ANSWER-GM - GC
In the process of natural gas production, what is the purpose of injecting sand? -
ANSWER-It keeps fractures open
Aerial photographs that were shot an an elevation of 3000' and using a focal length of
6". What is the scale of the map? - ANSWER-6 = 3000 -> 1 = 500
Gossan or "rust' is formed at the surface as a result of hydration of iron oxides during
natural weathering and/or alteration processes in areas that are underlain by valuable
, mineralization of metal sulfides. What technique is particularly suited for investigating
these types of ore bodies? - ANSWER-Landsat remote sensing
An area with a collection of closed depressions, some of which are full of water, resulted
from what? - ANSWER-*Collapse of coal mine
*Collapse of rock over an underground cavity in limestone
*A large landslide in an area underlain by clayey soils
MTBE - ANSWER-Methyl Tertiary Butyl Ether
Finding MTBE source in an unconfined aquifer - ANSWER-GIS
Trilobites are important to the dating of rocks b/w the Cambrian and the Permian b/c -
ANSWER-Their presence defines the lower limit of the Cambrian Period and Paleozoic
Era.
Generate a series of maps providing geologic features, delineating map coverage of
investigations/reports done in the area. One million acres. What scale of maps would be
appropriate for the presentation? - ANSWER-Small-scale maps
In an area of limited surface outcrops, is a large overturned anticline composed of an
incompetent bed bounded by two competent beds. How would you determine which
limb is overturned? - ANSWER-Examine drag folding within the incompetent bed
Drag Faults - ANSWER-occur in conjunction with faults, and they represent the bending
of rock before it breaks
What would be the proper stratigraphic reference for the formally name Kaibab
limestone formation which was deposited during the end of the Permian? - ANSWER-
Kaibab Limestone (Late Permian)
What happens in an oxidation-reduction reaction? - ANSWER-Electrons are transferred
b/w chemical species, changing the oxidation states
Soils described as a CH would be _______ - ANSWER-High plasticity clays
Geologic map 1:24000 the outcrop of a geologic unit measures 0.4" perpendicular to
strike. How many feet wide is the outcrop? - ANSWER-24000/12 = 2000
2000 X 0.4 = 800'
Coal rank is based on the degree of metamorphism (coalification) and is based on heat
value, fixed carbon and volatile matter in the coal. With increased rank one would
expect - ANSWER-a higher density and higher specific gravity
A circular feature found on a geologic map in an area of moderate relief could result
from which of the following? - ANSWER-*a structural dome
