ees9 test 3
Card Set Information
ees9 test 3
ees 9 test 3
The parallel arrangement of mineral grains that can occur in a metamorphic rock due to compressionial stress is called:
How are Strato/Compositie Volcanoes formed?
Alternating layers of pyroclastic ash and lava
Which type of metamorphism results from high pressures but low temperatures often associated with fault zones?
Plant roots breaking rocks into smaller and smaller pieces is called ________ weathering?
Mechanical / Physical
The mechanical weathering process most predominant in cold climates that may often produce a talus slopes is ________.
Which agent of weathering is responsible for the greatest amount of erosion?
Which of the following best characterizes an angular unconformity?
tilted strata lie below the unconformity; bedding in younger strata above is parallel to the unconformity
Is it possible to determine the processes that form some rocks just by looking at them?
Yes - most rocks hold cluse as to how they formed
Which Era ended with the greatest mass extinction in history where 90% of marine life died.
Volcanic eruptions can affect global climate and agriculture.
What does �metamorphism� mean?
Which of the following is not correct�regarding volcanic rocks?
They cool slowly underground
The major divisions in the Geologic Time scale are based on:
A change in life and events on the Earth
What is the oldest Eon - when the Earth was born?
What is the most likely texture of an igneous rock if magma cooled slowly underground then erupted to the surface as a lava flow?
Fine grained porphyritic
The change in rock brought about primarily by heat rather than pressure and is caused by a plutonic intrusion is called:
The texture of a sedimentary rocks is controlled by:
Frost wedging is the result of __________.
Ice expandign 9% breaking apart the rocks
Quartz is quite resistant to weathering and is an important component of sands in riverbeds and on beaches.
When the internal structure of a mineral is altered by the removal and / or addition of elements it has been subjected to _________________.
Weathering is what breaks down rocks; ________ is what physically removes the material by and carries it away.
Which of the following is not an example of mechanical / physical weathering?
The two types of Igneous rock are:
Volcanic and Plutonic
What is the main hazard associated with Caldera type eruptions?
large volumes of hot ashfall and pyroclastic eruptions
A structure created when lava, gases, and hot particles escape through vents in the Earth are called:
A glassy texture in an igneous rock is the result of what?
Chilling the lava super quickly
Which of the following is the correct order of igneous rock textures from fast cooling to slowest?
glassy, fine grained, coarse grained
Coarser sediment is found far from source.
________ rocks form from the cooling and crystallization of molten rock.
What is the relationship between cooling rate and crystal size?
Slower cooling yields larger crystals
Which type of metamorphism affects a very large area?
Which of the three types of volcanoes have the most violent eruptions?
When a rock undergoes ______, such as frost wedging, it is broken into smaller and smaller pieces
Mechanical / Physical weathering
Solid / stable continents first appeared at the start of which eon?
Clastic / Detrital sedimentary rocks are classified (named) primarily on the basis of ________.
Grain or particle size
Rocks formed by alteration of preexisting rocks are called:
Which of the following is not a location where volcanoes normally occur?
Transform plate boundaries
What are the three agents of metamorphism?
Heat, pressure, & chemically active fluids
What controls the texture of an igneous rock?
A porphyritic texture in an igneous rock is the result of what?
2 distinct cooling rates
Which of the following is the most significant agent of metamorphism?
Which of the following is not true of a shield volcano?
they have the most violent eruptions
Mountain building events are formed from high heat and high pressures of what type of metamorphism?
Which type of volcano are the largest on the planet?
What is the most likely texture of an igneous rock if magma cooled slowly underground?
What fundamental concept states that in a horizontal sequence of conformable sedimentary strata, each higher bed is younger than the bed below it?
law of superposition
Which of the three rock types is the most abundant exposed at the surface of the Earth?
Some volcanoes have glaciers on top which may melt causing what type of hazard?
What is the silica content and eruptive style of a shield volcano?
Low silica - passive eruptions
What causes unconformities in the rock record?
Both A and C are correct
Which of the following describes the relationship between Silica content of a magma and Viscosity
The higher the silica contnet. the highter the viscosity
Which of the following is not a type of cement?
�Fish were the earliest lifeforms found in the rock record.
Which is younger: A fault that cuts through rock layers or the rock layers themselves?
Metamorphism may occur to which class of rocks?
All of the above
What are the two most common sedimentary rocks?
Shale and Sandstone
The subdivision of the geologic time scale that represents the longest time span is called a(n) ________.
Which of the following describes the relationship viscosity and a volcano�s eruptive style?
The higher the viscosity, the sticker the magma, the more violent the eruption
What marks the boundaries between the different Eras?
What is the age of the Earth accepted by most scientists today?
.5 - 4.7 billion years
The greatest agent of erosion is ______.
Which of the following is not an igneous rock texture?
Which one of the following is NOT true about mechanical weathering?
does not affect igneous rocks