64 Matching questions
- When a rock is buried it is subjected to greater confining pressure which tends to make the rock more __________.
- Which of the following presents the eras of the Phanerozoic eon in the correct order, from most recent to oldest?
A. Mesozoic, Cenozoic, Paleozoic
B. Cenozoic, Paleozoic, Mesozoic
C. Paleozoic, Mesozoic, Cenozoic
D. Cenozoic, Mesozoic, Paleozoic
- The number of _________ in an atom gives the atom its atomic number.
- How many protons (p) and neutrons (n) comprise an alpha particle?
A. 1p, 1n
B. 3p, 2n
C. 2p, 2n
D. 29, 1n
- The number of protons plus neutrons in an atom's nucleus is the atom's __________ number.
- Which one of these metamorphic rocks is composed predominantly of a single mineral?
A. garnet-mica schist
- Increased pressure on rocks during metamorphism may result in:
A. rocks becoming plastic in behavior
B. changes in rock texture & mineralogy
C. re-orientation of mineral grains
D. closer atomic packing and compression, elongation or rotation of mineral grains
E. All of the above
- Exposures of metamorphic rocks are most widespread in:
A. young mountains
C. oceanic Islands
E. stable platforms
- The age of the Earth is about
A. 4.5 million yrs
B. 540 million yrs
C. 4.5 billion yrs
D. 12.6 billion yrs
- After the third half-life, the fraction of the original radioactive atoms remaining will be __________.
- __________ dates pinpoint the time in history when something took place.
- __________ dating is the task of placing rock units and geologic events in their proper sequence.
- The Hadean, Archean, and Proterozoic are:
A. Eons that collectively comprise Precambrian
B. epochs of the quaternary Period
C. eras of the Phanerozoic eon
D. Periods of the Paleozoic era
- Which of the following is NOT the result of metamorphism?
A. growth of new materials
B. development of alignment of minerals within the rock body
C. re-crystallization of minerals
D. deep weathering of feldspar-rich rocks
E. conglomerate pebbles deformed into long elliptical shapes
- Which of the following pairs of parent rock and its metamorphosed equivalent is NOT correctly matched?
A. sandstone - quartzite
B. shale - slate
C. limestone - schist
D. granite - gneiss
E. conglomerate - metaconglomerate
- Which is the smallest time span on the geologic time scale?
- Which of the following index minerals indicates lowest grade metamorphism?
- The texture exhibited by slate, schist, and gneiss is called
- Which of these rocks is not a metamorphic rock?
- Atoms which have the same atomic numbers, but different mass numbers, are referred to as __________.
- The "layered" or "banded" appearance resulting from mineral alignment in a metamorphic rock is termed:
- The most common chemically active fluid involved in the metamorphic process is hot water containing ions in solution.
- In the geologic time scale, era names represent important differences in __________.
A. continental uplift
B. mountain building episodes
C. volcanic events
D. dominant life-forms
we observe strata that are inclined at a steep angle, we can conclude
that they were tilted sometime after their deposition by applying this
relative dating principle.
D. original horizontality
- We are presently living in the __________ era.
- The parallel re-alignment of rod-like minerals during metamorphism is:
A. slaty cleavage
- Which of the following is a non-foliated metamorphic rock?
B. Garnet-mica schist
- Which era of the Phanerozoic eon has the most Periods?
D. all have the same number
- Which one of the following is NOT a type of unconformity?
A. transitional unconformity
D. angular unconformity
- The only metamorphic rock in this list is:
- When stress is applied unequally in different directions, it is termed __________.
A. confining pressure
B. confining stress
C. differential pressure
D. differential stress
of the following metamorphic rocks is most likely to be formed at the
oceanic trench where an oceanic crust is being subducted underneath
A. Greenscist facies
B. Granulite facies
C. Eclogite facies
D. Blueschist facies
- What is the major source of heat for contact metamorphism?
A. deep burial
B. Frictional heat created by moving fault
C. Heat from the decomposition of minerals
D. Heat from a nearby magma body
- When a beta particle is emitted from the nucleus of an atom:
A. neutron becomes a proton
B. an electron changes to a neutron
C. a proton changes to a neutron
D. a proton changes to a neutron
- Which of the following rocks does not belong to the group?
- On the geologic time scale, __________ represent the greatest expanses of time.
E. none of the above
A. occurs during the deep burial of rock bodies
B. occurs around igneous intrusion
C. develops from strong directed horizontal stresses
D. commonly produces foliation that is not parallel with the original bedding of the rock being metamorphosed
E. all of the above
- Which one of the following is a foliated metamorphic rock?
B. anthracite coal
- Which of the following is NOT an accurate statement about metamorphic rocks?
A. The original rocks have been intensely altered.
B. Grains commonly have a preferred orientation.
C. They constitute a large part of the continental crust.
D. They are commonly strongly stratified.
- Which of the following metamorphic rocks is formed under very low pressure and low temperature?
- Each era is divided into smaller units called __________, which may be further divided into __________.
A. stages; period
B. epochs; ages
C. ages; stages
D. periods; epochs
- The rate of radioactive decay for each unstable radioactive isotope is expressed as its __________.
B. degeneration curve
C. deep span
D. radioactive term
- Which one of the following is NOT a type of radioactive decay?
A. alpha capture
B. beta emission
C. neutron capture
D. electron capture
- Which of the following can cause metamorphism?
A. chemical action of fluids
B. increases in pressure
C. increases in temperature
D. all of the above
- What type of unconformity consists of folded sedimentary rocks overlain by younger, more flat-lying strata?
B. reversed conformity
D. angular unconformity
- Which of the following is NOT foliated metamorphic rock?
- Which of the following is most likely to have
a granular texture?
E. A and B
- Eocene, Pleistocene, and Holocene are examples of
- Which of the following metamorphic rocks represents the highest intensity of metamorphism?
- Nonfoliated metamorphic rocks are usually composed of __________.
A. elongated mineral graind
B. equidimensional mineral grains
C. a mixture of elongated and equidimensional mineral grains
D. None of the above
- Eons are divided into one of these:
- Isotopes of the same atom will have different numbers of __________.
- The parallel arrangement of large platy minerals is best described as
A. slaty cleaveage
C. gneissic layering
- Which of the following metamorphic rocks has a porphyroblastic texture?
A. Garnet-mica schist
- Collectively, the Hadean, Archean, and Proterozoic eons are often referred to as the __________.
- Marble is metamorphosed from which of the following rocks?
B. Quartz sandstone
- Which one of the following is not an agent of metamorphism?
A. Pressure (stress)
D. Chemically active fluid
- Which is the subdivision of an epoch?
- Breaks or gaps in the rock record in which strata on both sides of the unconformity are parallel is:
A. a disconformity
B. a nonconformity
C. an angular unconformity
D. a conformity
metamorphism, elongated crystals tend to recrystallize with an
orientation that is ________ to the direction of greatest stress.
D. none of the above
- The Phanerozoic era began about ... years ago
A. 4.5 billion yrs
B. 2.5 billion years
C. 540 million yrs
D. 248 million years
- Rocks subjected to intense heat when they are intruded by magma undergo a process called
A. tectonic metamorphism
C. contact metamorphism
D. Thermal modification
- Cambrian and Jurassic are examples of
- Formation of metamorphic rock NEVER involves which of the following?
A. formation of new minerals from old
B. increase in density
C. complete melting of the material from which it formed
D. change in orientation of mineral from which it formed
E. change in shape of mineral grains
- a A. half-life
- b C. one-eighth
- c C. 2p, 2n
- d A. True
- e A. Zeolite
- f E. A and B
- g C. foliation
- h C. complete melting of the material from which it formed
- i D. Limestone
- j D. foliation
- k C. sandstone
- l D. Epochs
- m C. 540 million yrs
- n B. Paleozoic
- o C. Crystallization
- p C. Cenozoic
- q D. Blueschist facies
- r D. angular unconformity
- s C. eons
- t A. mass
- u B. equidimensional mineral grains
- v B. shields
- w D. They are commonly strongly stratified.
- x A. Era
- y A. Garnet-mica schist
- z C. slate
- aa C. contact metamorphism
- ab B. schistosity
- ac B. Granite
- ad D. Gneiss
- ae B. perpendicular
- af D. Quartzite
- ag D. all of the above
- ah C. marble
- ai A. protons
- aj B. epoch
- ak C. isotopes
- al A. chlorite
- am C. numerical
- an A. a disconformity
- ao C. neutron capture
- ap A. transitional unconformity
- aq D. Cenozoic, Mesozoic, Paleozoic
- ar D. neutrons
- as E. none
- at D. period
- au A. Eons that collectively comprise Precambrian
- av D. Precambrian
- aw B. Relative
- ax D. Heat from a nearby magma body
- ay C. limestone - schist
- az E. All of the above
- ba D. dense
- bb D. differential stress
- bc D. marble
- bd D. gneiss
- be D. deep weathering of feldspar-rich rocks
- bf D. dominant life-forms
- bg E. all of the above
- bh D. periods; epochs
- bi A. neutron becomes a proton
- bj C. 4.5 billion yrs
- bk D. original horizontality
- bl D. lineation