How to pronounce "striation"?
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- Break 'striation' down into sounds : [STRY] + [AY] + [SHUHN] - say it out loud and exaggerate the sounds until you can consistently produce them.
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What does the word striated mean?
marked with striaae, or fine grooves, or lines of color; showing narrow structural bands or lines; as, a striated crystal; striated muscular fiber Etymology: [L. striatus, p. p. of striare to furnish with channels, from stria a channel.] How to pronounce striated?
What does striation mean?
Striations means a series of ridges, furrows or linear marks, and is used in several ways: Glacial striation. Striation (geology), a striation as a result of a geological fault. Striation Valley, in Antarctica. In hyperbolic geometry, a striation is a reflection across two parallel mirrors.
What does striated mean in anatomy?
What are striations in anatomy? Medical Definition of striated muscle : muscle tissue that is marked by transverse dark and light bands, that is made up of elongated fibers, and that includes skeletal and usually cardiac muscle of vertebrates and most muscle of arthropods — compare smooth muscle, voluntary muscle. Click to see full answer.
What is striation in geography?
In structural geology, striations are linear furrows, or linear marks, generated from fault movement. The striation's direction reveals the movement direction in the fault plane. Similar striations, called glacial striations, can occur in areas subjected to glaciation.
What are striations in geology?
Glacial striations are a series of long, straight, parallel lines or grooves scratched onto a bedrock surface by rock fragments lodged in the base of a moving glacier. They typically form on hard rock, such as quartzite, that is relatively resistant to erosion.
What causes striations geography?
Glacial striations or striae are scratches or gouges cut into bedrock by glacial abrasion. These scratches and gouges were first recognized as the result of a moving glacier in the late 18th century when Swiss alpinists first associated them with moving glaciers.
Whats the definition of striated?
Definition of striated 1 : marked with striations or striae. 2 : of, relating to, or being striated muscle.
What causes striations in rocks?
Over time, the glacier moves over rock and sediment, leaving striations or striae, on the rock surfaces that can reveal the direction that the glacier was flowing.
What are the striations in the mountains?
Glacial Striations The smaller particles, such as sand, smoothed out the surfaces of the mountains and rock. The larger stones dug into the rock, leaving scratches that now line the sides and exteriors. These lines are called striations.
How are striations formed?
Striations are a type of groove created when a glacier moves over rock and scratches the rock surface.
What process creates striations?
Striations are lines or scratches on rock surfaces, usually no more than a few millimeters in depth, produced by the process of glacial abrasion (Glasser and Bennett, 2004).
What are glacial striations quizlet?
Glacial striations. scratches and grooves on bedrock caused by glacial abrasion. Glacial Trough. a mountain valley that has been widened, deepened, and straitened by a glacier.
What is another word for striations?
What is another word for striations?corrugationgroovesincisionmarkingpatternsridges
What is the best description of a striation?
What is the best description of a striation? Alternating dark and light bands of protein filaments.
What do striations represent?
The striated appearance of skeletal muscle tissue is a result of repeating bands of the proteins actin and myosin that are present along the length of myofibrils. Dark A bands and light I bands repeat along myofibrils, and the alignment of myofibrils in the cell causes the entire cell to appear striated or banded.
What are striations in minerals?
Striations are the narrow alternating grooves or furrows and ridges appearing as parallel lines on some minerals. When present, striations are a valuable diagnos- tic property.
How are striations formed?
Striations are a type of groove created when a glacier moves over rock and scratches the rock surface.
What are striations in crystals?
Striations are those small parallel lines on some crystal faces of minerals. Mineral identification books often list these as a diagnostic property for either identification or for distinguishing between two similar minerals.
What are striations and what do they tell us anatomy?
Striated muscles are highly organized tissues (Fig. 1) that convert chemical energy to physical work. The primary function of striated muscles is to generate force and contract in order to support respiration, locomotion, and posture (skeletal muscle) and to pump blood throughout the body (cardiac muscle).
What does "striation" mean?
striation. ( straɪˈeɪʃən) n. 1. (Geological Science) an arrangement or pattern of striae. 2. (Geological Science) the condition of being striate. 3. (Geological Science) another word for stria 1.
What is a striation?
striation- any of a number of tiny parallel grooves such as: the scratches left by a glacier on rocks or the streaks or ridges in muscle tissue
What is striated muscle?
1. a striated condition or appearance. 2. a stria; one of many parallel striae. 3. any of the alternating light and dark crossbands that are visible in certain muscle fibers. [1840–50]
What is the meaning of striae?
1. The state of being striated or having striae. 2. One of a number of parallel lines or scratches on the surface of a rock that were inscribed by rock fragments embedded in the base of a glacier as it moved across the rock. 3. The form taken by striae. 4.
How do striations form?
Striations form when pieces of rock frozen into the base of a glacier move across the rock and scratch it, or when two blocks of rock along opposite sides of a fault plane slide past each other, scratching the rocks' outer surfaces. The American Heritage® Student Science Dictionary, Second Edition.
What does striation mean in biology?
striation- a stripe or stripes of contrasting color; "chromosomes exhibit characteristic bands"; "the black and yellow banding of bees and wasps"
What interests us in operations of striationand smoothing?
They explain, "What interests us in operations of striationand smoothing are precisely the passages or combinations : how the forces at work within space continually striate it, and how in the course of its striationit develops other forces and emits new smooth spaces." Deleuze and Guattari go so far as to suggest that smooth space is not preferable in and of itself.
What is a striation?
striation. One of multiple, usually parallel grooves or scratches on a rock surface, produced by abrasion associated with glacial movement, stream flow, a geologic fault, or meteoric impact. See more at glacial striation shatter cone slickenside. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt ...
What is striated condition?
striated condition or appearance. a stria; one of many parallel striae. Geology. any of a number of scratches or parallel grooves on the surface of a rock, resulting from the action of moving ice, as of a glacier. Cell Biology. any of the alternating light and dark crossbands that are visible in certain muscle fibers, ...
What is the term for a number of scratches or parallel grooves on the surface of a rock?
Geology. any of a number of scratches or parallel grooves on the surface of a rock, resulting from the action of moving ice, as of a glacier.
Do sharks have linear striation?
Most modern sharks have linear striation s on their scales, which may offer some boost to their swimming efficiency.
Is the striation of the cones still present?
The striation of the cones is still present, but is not nearly so clear as it was in the earlier stage.
Where are striations found?
Striations cover the sides and bottoms of the grooves. Other examples of glacial striations can be found in the former path of the Moiry Glacier, south of Grimentz, Anniviers, Valais, Switzerland, alongside the present path of the glacier, north-east of the 2016 location of the tongue of the glacier (images).
What are striae in glaciers?
Glacial striations or striae are scratches or gouges cut into bedrock by glacial abrasion. These scratches and gouges were first recognized as the result of a moving glacier in the late 18th century when Swiss alpinists first associated them with moving glaciers. They also noted that if they were visible today that the glaciers must also be receding.
How do glaciers move?
Glacial striations are usually multiple, straight, and parallel, representing the movement of the glacier using rock fragments and sand grains, embedded in the base of the glacier, as cutting tools. Large amounts of coarse gravel and boulders carried along underneath the glacier provide the abrasive power to cut trough-like glacial grooves. Finer sediments also in the base of the moving glacier further scour and polish the bedrock surface, forming a glacial pavement. Ice itself is not a hard enough material to change the shape of rock but because the ice has rock embedded in the basal surface it can effectively abrade the bedrock.
What happens when a glacier moves faster?
Speed of the glacier. The faster the glacier moves, the faster the bedrock will be eroded. Thickness of the ice. Thicker ice causes more downward force and increased pressure between the abrading fragments and the bedrock. There is a limit to how much ice will enhance abrasion.
What happens when the friction between fragments and bedrock is too great?
If the friction force between fragments and bedrock is too great the ice will flow around the fragments. Basal meltwater under high pressure. If the meltwater is under sufficiently high pressure it will cause the ice to effectively buoy up and decrease the normal force of the ice on the bedrock.
Which type of fragment will scratch and scour more effectively?
Shape of the fragments. Larger more angular fragments will scratch and scour more effectively than small and round fragments will.
Can shale fragments abrade bedrock?
The fragments must be harder than the bedrock. Quartz fragments will abrade shale but shale fragments will not abrade a quartz rich bedrock.
