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Geologic Time Scale Study Guide
Terms in this set (50)
Throughout the Early and Middle Triassic, before Pangaea split apart, this supercontinent and two oceans defined Earth's paleogeography.
False (one ocean)
The first mammals, birds, and flowering plants arose during the Cenozoic, which was a time of many biological firsts.
Paleogeography is the ancient geographic setting of an area.
Most of the currently living mammals appeared.
Grassy savannas were common worldwide.
An abundance of diverse mammals inspired the phrase Golden Age of Mammals.
Great savannas were replaced by arid land as the ice age began.
Largest recorded waterfall .
Mammoths and saber-toothed cats evolved ability to survive cold conditions.
Fossil-rich basin deposit in Wyoming.
Green River Formation
Mountains in the Pacific Northwest that are the result of the subduction of an ocean plate beneath western North America.
Series of north-to-northeast trending mountains from Nevada and Utah to Mexico.
Basin and Range Providence
Mountains formed by collision of India and the south margin of Asia.
Mountains formed by continent-to-continent collision of Africa and Eurasia.
Highest point on Earth, which is topped by Ordovician marine limestones.
What were the first vertebrates to walk upright on land in the Mesozoic?
What important function do phytoplankton perform?
Phytoplankton had the performance of microscopic organisms of the loss of the marine food chain.
How did the mass extinction at the end of the Paleozoic Era set the stage for the appearance of new organisms during the Mesozoic?
The mass extinction at the end of the Paleozoic Era, consisted of underwater life, and it's life forms. During ancient environments relationships between environment and organisms changed and drove the rest of the organisms to land, which brought the new organisms of the Mesozoic. (The biosphere becomes barren and leaves room for development)
What three groups of organisms first appeared during the Mesozoic?
Flowering plants, mammals, birds and dinosaurs.
What was the mountain building orogeny in Western Laurentia during the Mesozoic?
What kind of deformation characterizes the second phase of the orogeny?
Oceanic crust had fast deformation, characterized the second phase of the orogeny.
As the climate cooled during the late Eocene, forests gave way to open land, which supported a diversity of large mammals.
A(n) ________________ is a structure composed of carbonate skeletons made by living organisms, such as coral.
Evaporite rocks are more permeable than reef rocks.
Sea level increases when the number and size of glaciers on Earth increase.
The Cambrian explosion refers to a rapid increase in volcanic activity.
Rate of subduction is one factor that distinguishes the three phases of the Cordilleran Orogeny.
Reptiles can reproduce on land, while amphibians need water to reproduce.
The tectonic forces that shaped Earth's continents no longer have any impact on Earth's features.
Dinosaurs' skeletons can be distinguished from those of other reptiles by the structure of the hips and legs.
As North America rifted from Europe and Africa, a continuous rift system called the ____ was formed.
The southernmost point to which glaciers advanced in North America is marked by the path(s) of the ____.
Ohio River and the Missouri River
Seed plants that lived during the Carboniferous impact life on Earth today because________.
Their remains formed coal, which is an important resource.
A rapid appearance of many new species of organism's usually________.
Happens after a massive extinction.
Today, many types of organisms live in a marine environment. When did most of the phyla of marine animals alive today first appear?
This graph best represents the populations of marine groups before and after the _______?
If two continents of equal size were to collide and become one, how would the total area of continental shelf space associated with the landmass change?
In would decrease.
Which point on the timeline best indicates the time when birds first appeared?
The extinction event shown on the time line was________.
Mild compared to the other extinction events.
The shaded area of this graph could be used to represent________.
The portion of the Earth's land covered with ice at the peak of the Cenozoic ice ages.
Tiny, ocean-dwelling organisms called ________________________ made up the base of the food chain during the Mesozoic.
When there is no tectonic activity along the edge of a continent, the edge is referred to as a ____.
During the ____, all but one of the major marine phyla appeared.
Ancient geographic setting of an area.
Continental edge with no tectonic activity.
Mountain-building event named for the mountains of eastern New York State.
Contains fossils of soft-bodied Cambrian organisms.
Repeating pattern of sedimentary sequences stacked on top of each other.
Mountain range in present-day Colorado formed by inland uplift.
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