Font size
WorksheetsGeologic History Test Study Game - Unit 7
Total questions: 20
Worksheet time: 3600secs
The unconformity most likely occurred after
all the bedrock layers were formed
fault x y broke all the lower layers up to B
layer A formed, but before layer B formed
layer C formed, but before layer but before layer D formed
Fossil evidence indicated that the earliest mammals developed during which time interval?
A
B
C
D
Which geologic event occurred in New York State at about the same time as Extensive coal-forming forests were around?
Catskill delta forms
Alleghenian orogeny
Dome-like uplift of Adirondack Mountains
Advance and retreat of last continental ice
How long does it take for this radioactive material to decay through 3 half-lives?
1 x 103 years
5 x 103 years
15 x 103 years
20 x 103 years
Due to radioactive decay, a sedimentary rock sample now contains one-eighth of the amount of the Uranium-238 that it originally contained. The age, in years, of this rock sample is approximately
4.5 x 109 years
9.0 x 109 years
1.4 x 1010 years
1.8 x 1010 years
Which index fossil has been found in the Devonian-age bedrock?
Which numbered layers most likely formed at the same time?
1 & 6
2 & 8
3 & 5
4 & 7
How much of a 1,600 gram sample of carbon-14 will remain after 22,800 years?
50 grams
100 grams
400 grams
800 grams
Which rock unit is oldest in age?
A
B
C
D
Which sequence best describes the geologic history, from oldest to youngest, that occurred at this site.
deposition of F, D, C, B → intrusion of E → uplift and erosion → deposition of A
intrusion of E → deposition of F, D, C, B → uplift and erosion → deposition of A
deposition of F, D, C, B, A → uplift and erosion → intrusion of E
deposition of F, D, C, B, A → intrusion of E → uplift and erosion
The rock that formed in the contact metamorphic zone between rock unit E and rock unit F is
marble
schist
anthracite coal
quartizite
During with geologic period was New York State closest to the equator?
late Devonian early Mississippian
late Precambrian early Cambrian
late Cretaceous early Paleogene
early Cretaceous
Which radioactive isotope is most often used when determining the age of recent organic remains?
carbon-14
potassium-40
uranium-238
rubidium-87
Which radioactive element is used to determine the absolute age of Pleistocene and Holocene plant remains?
carbon-14
potassium-40
uranium-238
rubidum-87
What significant event occurred in the middle Archean to early Proterozoic?
abundant amphibians appeared
oldest known rocks appeared
first sexually reproducing organisms appeared
oceanic oxygen began being produced by organisms
Which rock layer contains the youngest fossils?
A
B
C
D
Which New York State index fossil may have been present in the rock layer that is missing due to the unconformity?
After the metamorphism of rock d, which sequence of events most probably formed unconformity AB?
flooding-> deposition -> erosion -> uplift
uplift -> erosion -> flooding -> deposition
deposition -> flooding -> uplift -> erosion
erosion -> flooding -> uplift -> deposition
Folding in rock layers is caused by
erosion of overlying sediments
contact metamorphism
the collision of lithospheric plates
the extrusion of igneous rocks
Which two rock layers most likely formed at the same time?
A & C
A & B
B & C
B & D
