48 Questions
What is the primary mechanism by which an andesitic island arc is formed?
Subduction of oceanic lithosphere and partial melting of basaltic oceanic crust
What is the source of granitic magma in the context of continental formation?
Partial melting of andesite
What is the result of the collision of two island arcs?
The formation of a continental core
What is the role of the asthenosphere in the context of continental formation?
It facilitates the flow of mantle material beneath the island arc
What is the primary component of the continental nucleus?
Andesitic crust
What is the relationship between the formation of an andesitic island arc and the formation of granitic continental crust?
The formation of an andesitic island arc is a precursor to the formation of granitic continental crust
What is the ultimate result of the process described in Figure 8.5?
The formation of a continental core
What is the role of partial melting of basaltic oceanic crust in the context of continental formation?
It provides the source of granitic magma
What is believed to have occurred during the formation of greenstone belts?
Increased volcanic activity and faster plate movement
What is currently happening in terms of plate movement and volcanic activity?
Slower plate movement and less volcanic activity
What type of rocks accumulate in back-arc basins, according to one model of greenstone belt formation?
Volcanic and sedimentary rocks
When did the process of continent growth occur?
During the Precambrian era
What is the result of more residual heat and radiogenic heat?
More volcanic activity and faster plate movement
What is the current understanding of greenstone belts and their formation?
The process is not fully understood and is still being researched
What is believed to have been the result of more volcanic activity and faster plate movement during the Archean eon?
More continent growth and volcanic eruptions
What is the name of the geological structure that forms in back-arc basins and eventually evolves into a greenstone belt?
Greenstone belt precursor
What is believed to have occurred during the Mesoarchean and Neoarchean periods?
The assembly of supercontinents, such as Vaalbara and Kenorland
What process is thought to have resulted in the accumulation of the atmosphere?
Outgassing involving the release of gases from Earth's interior during volcanism
What is the name of the supercontinent that may have existed from 3.1 to 2.8 billion years ago?
Vaalbara
What type of event is depicted in Figure 8.11?
Mountain building
What is responsible for the origin of some of the Archean rocks in several parts of the Canadian Shield?
Deformation
What is thought to have been released from Earth's interior during volcanism?
Gases, including hydrogen and nitrogen
What is the name of the supercontinent that may have assembled by 2.7 billion years ago?
Kenorland
What is the time period during which the assembly of supercontinents, such as Vaalbara and Kenorland, is believed to have occurred?
Mesoarchean and Neoarchean
What type of sedimentary rocks are likely to form in a muddy ocean bottom?
Muddy
What is the name of the geological formation that resulted from the transgression of the Tippe-canoe Sea?
St. Peters Formation
What is the name of the geological structure that forms in back-arc basins and eventually evolves into a greenstone belt?
Cordilleran Mobile Belt
What type of rocks are likely to accumulate in back-arc basins?
Greenstone
What is the result of the collision of two island arcs?
Formation of an andesitic island arc
What is the role of partial melting of basaltic oceanic crust in the context of continental formation?
Formation of granitic magma
What is the primary component of the continental nucleus?
Granitic rocks
What is the relationship between the formation of an andesitic island arc and the formation of granitic continental crust?
They are related processes
What is the ultimate result of the process described in Figure 8.5?
Formation of granitic continental crust
What type of event is depicted in Figure 8.11?
Collision of two island arcs
What is the main purpose of hydraulic fracturing sands?
To create permeable passageways for oil or gas to migrate to the well
Which type of rock predominantly contains the mineral deposits mentioned?
Ordovician rocks
During which geological period have the mentioned mineral deposits been largely depleted?
Ordovician
Where does most of the lead and zinc mined in Missouri currently come from?
Mississippian-age sedimentary rocks
What geological time period is associated with the oldest given rock formations in the provided hierarchy?
Cambrian
What aspect of the text is protected by copyright according to the provided section?
All content excluding third party material if suppressed
Which formation is known for its almost pure quartz composition used in manufacturing glass?
St. Peter Sandstone
During which geologic periods did the deposition of the Tippecanoe Sequence occur?
Middle Ordovician to Early Devonian
What geological event caused the deposition of shales in the eastern portion of the craton?
Weathering and erosion of the Taconic Highlands
What significant geological process marks the beginning of the Tippecanoe Sequence?
Major transgression onto the craton
What does the St. Peter Sandstone primarily consist of?
Quartz
What geological feature marks the farthest extent of detrital sediments in the eastern craton?
Shales
The Tippecanoe Sequence was impacted by a tectonic event in which mobile belt?
Appalachian Mobile Belt
What does the term 'transgression' refer to in the context of the Tippecanoe Sequence?
Inundation of land by the sea
This quiz explores the origin of granitic continental crust, including the formation of island arcs and the process of subduction.
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