What is Glacial fluvial sediment?

Question

If you can tell me what it is and how its made or any information on it that would be helpful and a picture would mean best answer

Answer 1

Glacial fluvial sediment is sometimes known as 'glacial outwash'.

It is material carried away from a glacier by meltwaters, and deposited downstream.

Sonetimes it is just sand and gravel, at other times it may be very finely ground rock, abraded by the ice as it passes over the bedrock.  This material is called 'glacial flour', because it is so fine.  It is carried further away from the glacier than gravel and sand; and may be deposited in a quiet glacial lake.  If it becomes lithified, it may forn characteristic banded shale-like rocks called 'varves'.  Very occasionally, bits of glacial ice might float over the lake and melt, dropping stones thad had been caught up in the ice.  If these fall into the soft mud, they can become fossilised as 'dropped pebbles' - a sure sign that the sediments are glacial in origin.

Another form of glacial deposits is 'tillite', a characteristic conglomerate type of rock, containing particles varying from boulder size to silt; all jumbled together.  These were originally glacial moraines, and may either be fluvial, or left in place if the glacier melts and recedes.  These deposits may the be re-worked by further fluvial action.

Answer 2

it is a sediment that is formed by rocks and gravel, and glaciers

Answer 3

Fluvia is waste from the action of a glacier.  The glacier changes shape and moves during its lifetime and the rock beneath it is often broken up into very fine grains, which unlike grains of sand do not have sharp edges  and which are easily suspended in water.  

As water melt moves away from a glacier, it carries the fluvia with it and deposits it when the water velocity is low enough.  The fluvial sediment is that part of the fluvia deposited.  Often this is referred to as glacial silt.  The suspended portion generally reduces habitat for fish without destroying it completely.  That is, the habitat can still support fish but fewer per volume than somewhat clearer water.