water and sunlight.
sunlight and sugar.
sugar and oxygen.
water and carbon dioxide.
A continental shield is part of a (an)
A typical extrusive igneous rock with ferromagnesian minerals is called
The youngest Eon for which we have geological record is
Proterozoic climates were warm and arid at a high latitude as well as shown by
boulder deposits in the Gowganda.
limestone and dolomites in reeflike colonies.
The length of day near the end of Proterozoic was about
The orogen in the western margin of Slave province.
During Early Paleozoic, Laurentia lay near
the North Pole.
the South Pole.
45 degrees north.
45 degrees south.
The largest Early Paleozoic continent was
This is an ancient geologically stable region in continental interior:
A major mass extinction occurs at
543 million years.
416 million years.
251 million years.
66 million years.
4.6 billion years.
Clastic deposits of the Taconic orogeny in the eastern U.S. are called
Queenston clastic wedge.
Taconic highlands. - maybe
The European equivalent of the Appalachian Mountains are called
An example of a coarse clastic sedimentary rock with grains over 2 mm across is
The Early Paleozoic ocean on the east side of Laurentia is called
The Iapetus started closing during Early Paleozoic, thus initiating the first eastern-margin orogeny known as
A carbonate fossil that is rather rare in Archean rocks, but is much more common during Proterozoic is called
The Taconic orogeny occurred during
An example of a marine environment of deposition is
A type of geologic evidence of past glaciation is called
Select the vertical sequence that indicates regression.
shale over sandstone
limestone over conglomerate
sandstone over conglomerate
sandstone over shale
shale over conglomerate
This is composed mainly of Fe and Ni:
The geological principle that states that the oldest rock layer is at the bottom is
original lateral continuity.
The Proterozoic supercontinent is called
Between the Cambrian Appalachian seaway and the Transcontinental arch was
lowlands of the Canadian shield .
shallow, epicontinental sea.
In Archean banded-iron formations, the red layer has a composition of
Fe2O3 and Fe3O4.
sulfides such as FeS2.
The base of Cambrian strata is the top of
The Archean Eon ended
4.6 billion years ago.
3.8 million years ago.
2.5 billion years ago.
0.9 million years ago.
540 million years ago.
A geological period during Early Paleozoic is
The 2,250 km-thick, liquid layer in the Earth is called the
Metamorphic rock that forms from alteration of sandstone is
A clastic rock made entirely of clay is
The radiometric age of Cambrian rocks ranges from (million years)
Paleoproterozoic ‘ice age’ tillites and glacial lake deposits occur in this formation in the Superior Province.
The age of the Grand Canyon Supergroup is
A large western basin that was active during Ordovician is called
The shoreline deposits of the Caledonian orogenic belt are called
The first stage in Wilson Cycle is
opening of an ocean basin.
sedimentation along the margins of separating continents.
closing of the ocean basin through plate tectonics.
onset of the glacial cycle.
formation of banded iron deposits.
This is NOT a province in Canadian Shield of North America.
The Proterozoic Eon ends about
2,500 million years ago.
2,500 years ago.
542 million years ago.
542 years ago.
4.6 billion years ago.
A key Early Paleozoic fossil group for which a “facies” is names is called
Today, the Early Paleozoic continent of Baltica is part of
The earliest known calcium carbonate, shell-bearing fossils are called
The first great transgression during the Early Paleozoic (began in Late Proterozoic) was
These are ultra-high temperature, ultramafic volcanic rocks.
Refers specifically to finding the order of ages among a sequence of rocks:
relative age dating
actual age dating
absolute age dating
radioactive age dating
This fossil marks the Cambrian base.
shelly multicellular forms
Select the formation below that contains the thickest outpouring of lavas.
Upper Cambrian lithofacies characteristics of the U.S. mid-continent (east of the Transcontinental Arch) is
Formation rich in copper deposits is called
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