How was the ice age shaped in New York?
Over the last two million years, New York has experienced several Ice Ages interspersed with warm periods. Gigantic glaciers covered the state, and then retreated. Each wiped the landscape nearly clean—changing the course of rivers, widening valleys, and rounding mountaintops.
What NYS landscape region is a terminal moraine created by the last ice age glaciation?
New York’s Post-Glacial Landscape At the Verrazano Narrows, a terminal moraine once connected Long Island and New Jersey like a land bridge, acting as a dam that held back a huge freshwater lake, Lake Hudson, now New York Harbor.
What effect did glaciers have on New York?
The ancient sheet of ice also left its mark on a very modern phenomenon: New York City. The ice over Manhattan would have buried even the tallest skyscraper and was so heavy that it depressed the underlying bedrock. As it melted, giant boulders embedded deep within its flanks landed throughout what became the city.
How did glaciers shape the geography of New York State?
Glacial Rivers and Lakes Receding glaciers left fertile soil behind, and the melting water from so much ice created new rivers and changed New York’s topography. As well as creating river valleys, glacier movements also created lakes.
What are two possible causes for ice ages?
Although the exact causes for ice ages, and the glacial cycles within them, have not been proven, they are most likely the result of a complicated dynamic interaction between such things as solar output, distance of the Earth from the sun, position and height of the continents, ocean circulation, and the composition of …
What is the best evidence that a glacial erratic has been transported?
What is the best evidence that a glacial erratic has been transported? It is located at a high elevation in a mountainous area. It is less than 25 centimeters in diameter. It appears to have been intensely metamorphosed.
How is erratic formed?
Erratics are formed by glacial ice erosion resulting from the movement of ice. Glaciers erode by multiple processes: abrasion/scouring, plucking, ice thrusting and glacially-induced spalling. Glaciers crack pieces of bedrock off in the process of plucking, producing the larger erratics.
What is the best evidence that a glacial erratic has been transported quizlet?
The total surface area increases and chemical composition remains the same. What is the best evidence that a glacial erratic has been transported? Its composition is different from that of the bedrock under it.
What is the largest particle size that a stream can transport?
CM
Which statement explains what happens to sediment during deposition quizlet?
Which statement explains what happens to sediment during deposition? It is transported to a different location. It is released from a transporting medium.
Which particle would have the slowest rate of deposition?
Explanation: particle with sharp ends would have the slowest rate of deposition. The frictional force which is important that gives resistance to the movement will be higher for irregularly shaped particles and this is the reason sharp ends particles have the slowest rate of deposition.
Which statement explain what happens to sediment during deposition?
The correct answer is – It is released from a transporting medium. The deposition process in essence means that a sediment that is transported by a certain medium is released at a certain place and creates deposits of the sediment.
What are the main causes of deposition?
Deposition is the geological process in which sediments, soil and rocks are added to a landform or landmass. Wind, ice, water, and gravity transport previously weathered surface material, which, at the loss of enough kinetic energy in the fluid, is deposited, building up layers of sediment.
Which agents are responsible for deposition of sediment?
There are three main agents of deposition i.e. water wind and ice which mainly act as agents of change on the surface of earth for deposition of sediments.
When sediment is glued together this is called?
The process where sediment becomes glued together is called. Compaction.
What causes sediment to stick together?
Compaction occurs when pressure on layers causes sediments to stick together and form solid rock.
What is the process called in which pressure on sediment causes clasts to stick together?
As sediment deposition builds up, the overburden (or ‘lithostatic’) pressure squeezes the sediment into layered solids in a process known as lithification (‘rock formation’) and the original connate fluids are expelled.