GEL Lab 7 Geologic Time 2026 NEWEST EXAM
COMPLETE 50 QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS)
ALREADY GRADED A+ BRAND NEW!!
Angular Unconformity - CORRECT ANSWER: An angular unconformity is an unconformity
where horizontally parallel strata of sedimentary rock are deposited on tilted and eroded layers,
producing an angular discordance with the overlying horizontal layers.
Cenozoic era - CORRECT ANSWER: New life
Correlation - CORRECT ANSWER: Connects geologic formations from place to place and puts
them into relative stratigraphic order.
Cross-Cutting Relationships - CORRECT ANSWER: Cross-cutting relationships allow
geologists to establish the relative ages of igneous intrusions or faults within a stratigraphic
succession.
Disconformity - CORRECT ANSWER: The type of unconformity shown here, created through
uplift and erosion followed by subsidence and another round of sedimentation on top of an
undeformed surface, is called a disconformity.
Faunal Succession - CORRECT ANSWER: It tells us whether one formation or fossil
assemblage is older than another, but not how long the eras, periods, and epochs were in actual
years.
Formatins - CORRECT ANSWER: Specific geologic units identified by their lithology (rock
type) and position
Formation Names - CORRECT ANSWER: Usually include a place name (type locality) and
lithology (rock type)
, Fossils - CORRECT ANSWER: The remains of a plant and animal life
half-life - CORRECT ANSWER: half-life: the time required for one-half of the original number
of parent atoms to be transformed into daughter atoms.
How could you use the principal of faunal succession to help you correlate rocks from one
location to another? What would you look for in the rocks to help guide your correlations? -
CORRECT ANSWER: Te known time period of the fossils of the layer to determine the period
of the layer.
Index fossils - CORRECT ANSWER: Short-lived but wide-spread
Mesozoic era - CORRECT ANSWER: Middle life
Nonconformity - CORRECT ANSWER: A nonconformity separates the Vishnu schist and the
Grand Canyon Beds. This structure indicates a period of deformation accompanying
metamorphism of the Vishnu schist, and then a period of erosion, before the deposition of the
Grand Canyon Beds.
Notes on the Geologic Time Scale - CORRECT ANSWER: 1. The ages are given in millions of
years. The Earth was formed approximately 4,600 million years ago. What is the equivalent age
in billions of vears?
2. Tire time scale presented above is not shown to scale. Using the ages on the right-hand side,
find the eon with the longest duration and the eon with the shortest duration.
3. Major subdivisions of the Precambrian occur conveniently at ages that are rounded to the
nearest 100 million years. In contrast, ages of geologic periods and epochs of the Phancrozoic
arc dated far more precisely.
COMPLETE 50 QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS)
ALREADY GRADED A+ BRAND NEW!!
Angular Unconformity - CORRECT ANSWER: An angular unconformity is an unconformity
where horizontally parallel strata of sedimentary rock are deposited on tilted and eroded layers,
producing an angular discordance with the overlying horizontal layers.
Cenozoic era - CORRECT ANSWER: New life
Correlation - CORRECT ANSWER: Connects geologic formations from place to place and puts
them into relative stratigraphic order.
Cross-Cutting Relationships - CORRECT ANSWER: Cross-cutting relationships allow
geologists to establish the relative ages of igneous intrusions or faults within a stratigraphic
succession.
Disconformity - CORRECT ANSWER: The type of unconformity shown here, created through
uplift and erosion followed by subsidence and another round of sedimentation on top of an
undeformed surface, is called a disconformity.
Faunal Succession - CORRECT ANSWER: It tells us whether one formation or fossil
assemblage is older than another, but not how long the eras, periods, and epochs were in actual
years.
Formatins - CORRECT ANSWER: Specific geologic units identified by their lithology (rock
type) and position
Formation Names - CORRECT ANSWER: Usually include a place name (type locality) and
lithology (rock type)
, Fossils - CORRECT ANSWER: The remains of a plant and animal life
half-life - CORRECT ANSWER: half-life: the time required for one-half of the original number
of parent atoms to be transformed into daughter atoms.
How could you use the principal of faunal succession to help you correlate rocks from one
location to another? What would you look for in the rocks to help guide your correlations? -
CORRECT ANSWER: Te known time period of the fossils of the layer to determine the period
of the layer.
Index fossils - CORRECT ANSWER: Short-lived but wide-spread
Mesozoic era - CORRECT ANSWER: Middle life
Nonconformity - CORRECT ANSWER: A nonconformity separates the Vishnu schist and the
Grand Canyon Beds. This structure indicates a period of deformation accompanying
metamorphism of the Vishnu schist, and then a period of erosion, before the deposition of the
Grand Canyon Beds.
Notes on the Geologic Time Scale - CORRECT ANSWER: 1. The ages are given in millions of
years. The Earth was formed approximately 4,600 million years ago. What is the equivalent age
in billions of vears?
2. Tire time scale presented above is not shown to scale. Using the ages on the right-hand side,
find the eon with the longest duration and the eon with the shortest duration.
3. Major subdivisions of the Precambrian occur conveniently at ages that are rounded to the
nearest 100 million years. In contrast, ages of geologic periods and epochs of the Phancrozoic
arc dated far more precisely.
