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30 Cards in this Set
- Front
- Back
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The Phanerozoic Eon includes which Eras?
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The Phanerozoic Eon includes which three Eons?
-Paleozoic -Mesozoic -Cenozoic |
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Laurentia
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Laurentia
Composed mainly of North America, but includes parts of Greenland, Northwestern Ireland, and Scotland |
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Baltica
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Baltica
Composed of Russia west of the Urals and most of Northern Europe. |
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Kazakhstania
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Kazakhstania
The region between the Caspian Sea on the east and China on the west. |
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Siberia
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Siberia
Mostly Russia east of the Urals and north of Mongolia |
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China
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China
Composed of China, Indochina, and the Malay Peninsula. |
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Gondwana
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Gondwana
Composed of South America, Africa, India, Australia, and Antarctica. |
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Taconic Orogeny
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Taconic Orogeny
Under An active subduction zone formed along the eastern Margin of Laurentia during the Neoproterozoic. Under this great pressure, the edge of Laurentia folded and broke into multiple thrust faults. |
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Acadian Orogeny
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Acadian Orogeny
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Alleghenian Orogeny
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Alleghenian Orogeny
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Caledonian Orogeny
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Caledonian Orogeny
During the Silurian, the Iapetus Ocean continued to narrow until its northern end completely closed. |
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Hercynian Orogney
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Hercynian Orogeny
North America collided with Southern Europe, causing a mountain building event during the Silurian. |
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Craton
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The relatively stable part of the continent consisting of a Precambrian shield and the extension of the shield that is covered by flat-lying or only gently deformed Phanerozoic strata.
Is the relatively stable part of the continent consisting of a precambrian shield and the extension of the shield that is covered by flat lying Phanerozoic Strata. |
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Domes
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Domes
Erosional Truncation of domes exposes older rocks near the center and younger rocks around the peripheries. Sequences of strata over arches and domes tends to be thinner. Also, because these structures were periodically above sea level, they have many erosional unconformities. |
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Basins
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Basins
Compared to domes, thee were more persistently covered by inland seas, and thus have fewer unconformities. They also developed greater thickness of sedimentary rocks. In eroded basins, younger rocks are near the center and older rocks are around the edges. A great deal of resources like oil formed in this time inside the basins, from about 550 million years ago. |
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Orogenic Belts of North America
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Orogenic Belts of North America
The North American Craton is bounded on four sides by orogenic belts that have been the sites of intense deformation, igneous activity, and earthquakes. At least one of these belts is present on every continent. |
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How was the Cambrian easily identified by strata?
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How was the Cambrian easily identified by strata?
First occurrence of shell-bearing multicellular animals. (Issues with this include the first trilobites.) |
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What is the new definition of the Neoproterozoic Cambrian boundary?
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What is the new definition of the Neoproterozoic Cambrian boundary?
We place the boundary at the lowest (oldest) occurance of the feeding-burrows of the trace fossil Trichophyus. Trichophycus and associated traces reflect the first appearance of metazoan capable of tunneling through sediment. |
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During the Late Cambrian, describe what happens when Baltica hit Laurentia.
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During the Late Cambrian, describe what happens when Baltica hit Laurentia.
You get a lot of orogenic activities (mountain building events) in Pennsylvania |
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During what period did the Rocky Mountains start forming?
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During what period did the Rocky Mountains start forming?
The MIddle Silurian Period. |
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During what era did pangea come together again?
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During what era did Pangea come together again?
Late Paleozoic Era |
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Describe the distribution of the age of rocks typically found in basins.
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Describe the distribution of the age of rocks typically found in basins.
The youngest rocks will be in the center of a basin, and the oldest will be on the outskirts. |
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Describe the distribution of the age of the rocks typically found in domes.
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Describe the distribution of the age of the rocks typically found in domes.
The youngest rocks will be in the outskirts of a dome, and the oldest will be in the center. |
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Syncline
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Define Syncline
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What orogenic activity occurred when Baltica collided with Laurentia (North America).
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What orogenic activity occurred when Baltica collided with Laurentia (North America).
The Appalachian Mountain Range. |
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Why did the relative position of the equator move during the Paleozoic Era?
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Why did the relative position of the equator move during the Paleozoic Era?
This was due to the movement of the continents. |
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Cambrian Paleography Local to Kansas
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Cambrian Paleography Local to Kansas
During Cambrian time Kansas and the midwest consisted of a shallow epicontinental carbonate depositing sea. This created a vast reserve of carbonate rocks like limestone and other sedimentary sands, salt, shale, ect... as well as some clastics. |
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Ordovician Paleography
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Ordovician Paleography
During this period the Taconic highlands created a mountain range on the eastern side of the Alluvial Plains. This would become known as the Appalachians. |
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Cratonic Sequence and Sea Level Change
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Cratonic Sequences and Sea Level Change
-Sauk -Tippecanoe -Kaskaskia -Absaroka |
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The Sauk Cratonic Sequence
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The Sauk Cratonic Sequence
Named after one country in Montana. The Sauk was the first major transgression event, followed by a transgressive sedimentary (carbonate & clastics) sequence. Started in the Cambrian and finished in the Devonian Periods. Starting in the Early cambrian, it covered very few areas. One finds carbonates and clastics, and between the two lots of unconformities (due to errosions) |
