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Earth Science madiso

QuestionAnswer
A glacial deposit would most likely consist of particles in a wide range of sizes
which geolocic evidence would best support the inference that a continental ice sheet once covered a given location 1. polished and smooth pebbles meadering rivers V shaped valleys 2.scratched and polished bedrock: unsorted gravel deposits;transported boulders 3.sand and silt beaches :giant swamps marine fossils found on mountain tops 4. basaltic bedrock: folded, f
when a continental ice sheet passes over bedrock the rocks being transported will often gouge parallel scratches in the bedrock when the ice melts the debris carried by the glacier will pile up in unsorted deposits. These deposits may include particles s
define continental ice sheet Continental glacier. large masses of ice that cover major portions of a continent. During the Pleistocene Ice age. Large glaciers cover much of N America today continental ice sheets are found in Antarctica and Greenland
Define Gravel An Accumulation of sand and pebbles that have not been cemented together to form a rock.A naturally occuring mixture of material that is composed of particles generally are larger than sand grains(pebbles,cobbles and /or boulders.
define Unsorted any deposit that does not seen to be separated on the basis of size, shape, or density Unconsolidated materiaL containing a mixture of sediment sizes shapes or densities.
the diagram represents a Landscape area which process is primarily responsible for the shape of the surface shown in the diagram? the steep -sided U shaped valley;s are the direct result of erosion by valley (alpine) glaciers.
Landscape region define it A physiographic province. A region with similar bedrock type and structure and climate.
define Glacial Valley's U shaped valleys formed by large masses of moving ice.
Stream valleys V shaped valleys formed by running water.
In a diagram of a cross section of the Grand Cayon The rock type of layer X has been purposely left blank. The most propbable explanation for the development of the steep Redwall Cliffs is that this limestone layer? 1. is more resistant to erosiion tha the rock layers above and below the cliff's 2. was depositied in a marine envirnment 3. was uplifted by the granite intrusion 4. is younger than the rock layers above the cliffs answer is 1
Resistant rock layers such as the Redwall limestone erode slowly and form steep slopes called Cliffs Softer rock layers such as shale, erode quickly and form gentle slopes
define limestone Any sedimentary rock that is composed primarly of calcium carbonate (lime) Limestones can form by deposition of lime muds, precipitation of crystals or by the secretions of living organisms.
define intrusive igneous rock rock formed from the solidification of magma deep below the surface
define a valley a Lowland region between two higher elevations such as mountains. An erosional feature formed by rivers (V-shaped) and glaciers (u-shaped.)
Resistant rock Rocks that are not easily weathered or eroded. Rocks that are composed of minerals that are physicially hard and chemically stable.
when looking at a graph of deposit that is showing pebbles, sand, silt and clay. what is the most probable agent of erosion that deposited the unsorted sediments in the deposit B 1) a stream 2) a glacier 3) wind 4) ocean currents the answer is a glacier.
when glaciers melt, the sediments being transported are deposited. A mixture of sediment sizes will result in unsorted glacial deposits. The large number of different sizes represented by the graph of deposit B indicates this type of deposition.
define sorting The separation of sediments on the basis of some natural characteristic, such as size, shape or density.
Glacial deposits Drift. any rock material or fragements left by moving ice. Glacial deposits are often unsorted and angular
unsorted sediments a collection or deposit of fragments or particles witha wide range of sizes
which rock layers appear to have weathered and eroded most 1.Irondequoit limestone and Whirlpool sandstone 2. Power Glen shale and Queenston Shale 3.Lockport dolostone and Reynales limestone 4.Thorold sandstone and Rochester Shale. 2 is the answer
the Queenston shale and the Power Glen Shale are greatly worn away. They are composed of Soft rock units that weather and erode quickly. Rock units that are most resistant to weathering and erosion form the cap rock and projections in the profile.
define ERosion The breakdown and removeal of earth material by specific agents such as gravity, ground water and running water, ice wind wave action turbidity currents and human activities
Weathering the mechanical or chemical breakdown or rock material as a result of interactions with atmospheric conditions.
define nonresistant rocks Rocks that are easily weathered and eroded. Rocks that are composed of minerals that are physicially soft and chemically active under the atmospheric conditions that exist at the Earths surface.
Volcano Amountain formed by the accmulation of lava and /or pyroclastic material A cone-shaped mountain that forms as a result of extrusive igneous activity
Stream Velocity rate of flow for a stream or river. The stream velocity is one factor that determines the kinetic energy and erosional ability of a stream.
the granite boulder appears angular it is also found with cobbles that are much smaller The boulder and the cobbles were most likely transported by a glacier to their present location. The granitic composition excludes the choice involving limestone and v
what is this any rock fragment that is larger than a cobble. Rounded sediments with diameters that are greater than 25.6 The largest clastic size recognized by sedimentary geologists. a Bolder
define Erratic A rock fragment carried and deposited by glacial ice.
what must be the size of a bolder according to the RElationship of transported particle Size to water Velocity all sediments with a diameter greater than 25.6cm are classified as a bolders
define sediment any solide material that is transported and deposited by an agent of erosion. chemically precipitated from water or secreted by an organsim Layersof unconsolidated sediments may be compacted dewatered and cemented together to form clastic (fragmental) sed
a landscape is characterized by much transported soil, scrateched rock surfaces and wide U-shaped valleys The development of this landscape is probably the result of 1. stream action 2. wind erosion 3. uplifting 4. Glaciation answer is Glaciation
Landscape regions formed by alpine, valley or mountains glaciers are characterized by transported soil that is unsorted scratched rock surfaces and wide U-Shaped valleys
define Landscape region a physiographic province. A region with similar bedrock type and structure, and climate.
what is a transported sediments fragments or particles that are carried and deposited by one or more agents of erosion.
define a U- shaped valley Valleys that have very steep slopes and generally a flat valley floor. Valleys often formed by alpine or mountain glaciers.
what does a glacial deposit consist of particles in a wide array of sizes
The direction of movement of a glacier is best indicated by the 1. elevation of erratics 2. alignment of grooves in bedrock 3. size of kettle lakes 4. amount of deposited sediments answer is alignemnt of grooves in bedrock
As glaciers pass over parallel grooves, called striations,may be cut into the rock. The orientatio of the grooves provides evidence for the direction of glacial movement.
what is the general direction of continental glacial advance in the US was generally from West to East
Another ice age would probably result in a change in Sea level
The bedrock that weathered and eroded most easily is found in the
a rock sample was found in a gravel bank in the northern US the grooves were most likely caused by a glacial erosion
when you see a cross section repsresents the tranport of sediment by a glacier At which location is deposition most likely the dominent process. the place where the rocks are piling up
Created by: nfoglio
 

 



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