1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
vladimir1956 [14]
3 years ago
14

Glacial striations gouged into bedrock allow geologists to understand _____.

Biology
2 answers:
sasho [114]3 years ago
7 0

Answer;

C. the direction of glacial movement

Explanation;

-Striations are scratches formed on a rock surface by rock fragments frozen into the bottom of a moving glacier.Rocks embedded in the bottom of the glacier scrape along the newly exposed bedrock and leave behind line-shaped scratch marks called glacial striations. The direction of the scratch marks tells us the direction that the glacier flowed

-Glacial grooves and striations are gouged or scratched into bedrock as the glacier moves downstream. Boulders and coarse gravel get trapped under the glacial ice, and abrade the land as the glacier pushes and pulls them along.

aleksandr82 [10.1K]3 years ago
7 0

The direction of the glacial movement is determined by the geologists through the scratches as a result of the glacial striations on the bedrock.

Further Explanation:

The glacial striations are formed due to the passage of heavyweight ice over the rocks which causes scratches on the underlying bedrock. The rocks, boulders, and pebbles are trapped under the glacier as it moves down the bedrock. With the movement of the glacier the pressure and mass increase further pushing the glacier. This results in the gouging out of the rocks from the rockbed as the lower surface of the glacier contains sediments acting as a cutting tool. The ice in itself cannot change the shape of the bedrock, but the rock particles embedded into it are hard enough to cause abrasions.

The rate of abrasion can be affected by the following:

  • The hardness of the sediments embedded in the glacial ice must be higher than the bedrock.
  • The basal surface must contain a large amount of rock debris, large enough to cause abrasions.
  • The thicker the ice more is the force and pressure applied on the bedrock by abrading fragments.
  • The bedrock is disrupted faster if the speed of the glacier is faster.
  • The fragments which are smaller in size are less effective in producing scratches on the bedrock as compared to the large fragments.

The glacial striations help geologists ascertain and understand the direction of the glacier. This is because as the glacier moves it creates scratches on its way due to the presence of rock fragments. These gouged rocks help explain whether the glacier moved upwards or downwards.These striations also help in determining the speed of the glacier because of the glacier carried too much of rock debris within it, its speed must be slow. The striations also reveal the type of debris that was moved along with the glacier. For example, if the scratches on the bedrock are deep, it implied that the glacier must have carried large boulders with it.

Learn More:

  • Learn more about the fibrous skeleton of the heart <u>brainly.com/question/7301375 </u>
  • Learn more about blood cells bring oxygen and take carbon dioxide away <u>brainly.com/question/1213217 </u>
  • Learn more about the system prepares food for absorption into the bloodstream <u>brainly.com/question/310282 </u>

Answer Details:

Grade: High School

Subject: Biology

Chapter: Geology-Glacial Striations

Keywords:

Glacial striations, scratches, gouges, bedrock, glacier, rocks, pebbles, boulders, abrasions, glacial movement, glacial speed.

You might be interested in
Differences in traits such as hair texture are determined by differences in ? A) The location of sugar groups in DNA B)the seque
netineya [11]

Answer:

A

Explanation:

This is called the locus and is determined in Meiosis by gametes from parent cells. During meiosis there is this thing called 'crossing over' where the gametes (sperm and egg cells) homologous genes (genes of similar size and shape, such as X and Y chromosomes or X and X) exchange genes on the same locus to provide slightly different characteristics.

Please check this with your teacher but i believe that this is right. Hope this helps. ;)

4 0
3 years ago
Which species will most likely survive if earth temperature increase?
joja [24]

It's for sure not A because having thick fur will only make you hotter, and thus you will suffer a heat stroke. It's not C because small ears would not be long enough to provide you with cooling. That one does not make sense. It could be D, but the species would need to have alot of muscles in order to be consistently flapping there ears for the constant hear. Answer is B because it is the most logic, and the fewer amount of fur, the less hotter you will be, especially if your fur provides insulation.

Answer is B. Species B because fur would provide insulation.

5 0
3 years ago
"Which phase of mitosis shows the greatest difference between animal cells and plant cells"?
emmasim [6.3K]
The answer is Cytokinesis
5 0
3 years ago
What is expected when reactants break bonds?
andrew11 [14]
Breaking bonds takes energy, forming bonds releases energy
If you break more bonds than you form it would be an endothermic reaction
8 0
3 years ago
Helppppppppppppppppppp
iogann1982 [59]

Answer:wiwiwo2k

Explanation:

Jwjwjwkwk2

8 0
2 years ago
Other questions:
  • What did the evidence that Darwin collected during his voyage on the HMS Beagle allow him to accomplish?
    12·1 answer
  • A true-breeding red rose is repeatedly mated with a true-breeding white rose, and all of their offspring are red. if two of thes
    7·1 answer
  • Inherited traits are passed down from our parents to us their offspring, by the information that is coded in our parents'
    13·1 answer
  • Compartments A and B are separated by a membrane that is permeable to K+ but not to Na+ or Cl-. At time zero, a solution of KCl
    15·1 answer
  • Did dinosaurs exit at the same as mammals ?explain your answer using the geologic time scale
    7·1 answer
  • Suppose you are studying a population of bacteria in a lab some of the bacteria are born with a mutation that provides them resi
    11·1 answer
  • To which region of the periodic tabled does this image correspond
    10·1 answer
  • You are to create a story for a child of 5-6 years old. You will explain the brain and its functions to them. You need to use th
    6·1 answer
  • Do red blood cells cause blood clots? And how/why?
    14·2 answers
  • Only answer if you have an answer to one of the questions. Thank you.
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!