Geos exam 2
How much accumulation over the years is necessary to produce glacial ice flow?
40-50 meters is the minimum amount
The sierra Nevada is 50-80 miles wide and_____ miles long?
400
What is the volume of water when it expands?
9% volume Frost wedging
Several Mesozoic rocks exist in the Grand Canyon?
False
Name feature at arrow 8
Fault
Exfoliation occurs almost exclusively in?
Granite
Most of the rocks of the sierra Nevada are best termed?
Granite
Most of the rocks in the Rocky Mountains are?
Granite and Gneisses
Rock resistance at arrow 1 (cliff former)
High
Early 19th century fur trappers referred to high mountain valley as?
Holes
Name feature at arrow 4 (5th rock layer)
Supai
Exfoliation
is a form of mechanical weathering in which curved plates of rock are stripped from rock below.
Rock type at arrow 6 (crumbles easily)
shale
How many acres is Yellowstone NP?
2.2 million acres
The 1st of Yellowstones major eruptions began about?
2.2 million years ago
The gneisses of Grand Teton are as old as
2.8 billion years
Yellowstone has experienced ____ major eruptions?
3
Displacement along the Teton fault zone exceeds?
30,000 feet
Date Yellowstone NP was discovered?
March 1st, 1872
Obsidian Cliffs is actually composed of
Volcanic Glass
The last of Yellowstones major eruptions occurred about?
0.6 million years ago before present
The dike that intruded Mt. Moran occurred about?
1.4 billion years ago
The response is determined by:
1.Type of Rock 2.Type of environment
The official height of Grand Teton above sea level is?
13,700 feet
How many mountain ranges once stood over the Grand Canyon?
2
How many resurgent domes occupy the Yellowstone caldera?
2
How many cubic kilometers of material was erupted from yellowstones largest eruption?
2,500 cubic kilometers
The west Thumb of Yellowstone is actually a?
Baby caldera
Name feature at arrow 6 (8th rock layer)
Bright angle
Rock type at arrow 2 ( 3rd rock layer)
Coconino
Bakedzone
Contact metamorphism- due to the share heat of lava
3 Major Eruptions
ERUPTION AGE VOLUME Lava Creek Tuff .6 million 1000km Masa Falls Tuff 1.2 million 280 km Huckleberry Ridge Tuff 2.2 million 2500 km
The major eruptions of Yellowstone could be best described as?
Explosive/Rhyolite
The first scientist to explore the Grand Canyon?
John W Powell
Most important geological feature on the surface of the earth?
Joints
Name the feature at arrow 1 (1st layer)
Kaibab
Glaciers
Large masses of ice that originate on land, and show evidence of past or present motion.
Rock type at arrow 5 (Fizzes in acid)
Limestone
The highest peak in Rocky Mountain NP is?
Longs Peak
Which of the following properties of Yellowstone magma is incorrect?
Low viscosity
The metamorphism of limestone produces?
Marble
What physiographic province is similar to the Colorado Plateau?
None are similar. (cascades, sierra Nevada, basin and range, Northern Rockies)
Name feature at arrow 3
O'Neil butte
The rocksof the Grand Canyon are ___ but the Grand Canyon itself is___?
Old,Young
Age of rock at arrow 9
Precambrian
In the Rocky Mountain National park ____ age rocks are dominate?
Precambrian
Name feature at arrow 5 (6th rock layer)
Redwall
The predominant rock of Yellowstone is?
Rhyolite
Rock type at arrow 2 (large cross beds)
Sandstone
Type of rock at arrow 9
Schist
The oldest rocks of the Grand Canyon are classified as?
Schist's
Weathering
The response of rock to a new unstable enviroment
what was the 1st NP?
Yellowstone NP
Name of rock at arrow 10
Zoroaster
Name feature at arrow 7
Tonto Platform
Most of the rocks of the Rocky Mountain Nation Park are very old, Precambrian
True
Name feature at arrow 11
Unconformities (major)
Name rock at arrow 9
Vishnu
The oldest rocks of the Grand canyon are?
Vishnu
The 3 processes that level the earths surface. (denudation)
Weathering, Mass wasting, Erosion
