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Why is gravel most likely to be found on a river bottom than a lake bottom?
Wiki User
∙ 13y ago
This has to do with the flow of water churning the contents of the river, striking objects against each other (such as stones) and the friction of water against the surfaces of the river's edge and the items at the bottom of the river, such as driftwood and rocks that have been carried by the current downstream. Lakes typically are the origin points of rivers and streams, and thus have low current at the bottom of the body of water, therefore less friction is generated to break down large objects into smaller objects. The edge of the lake, however, is often characterized by sand and small bits of broken objects, due to the motion of waves that travel along the surface of the lake to the water's edge. These objects are worn smooth and continue to break down into smaller and smaller items as they continue to be affected by the tides and churning force of the water on them, rolled back and forth against other objects.
For a good example of friction over time, take a piece of sandpaper and apply it to a section of a board of wood for about five minutes a day. The low amount of friction does not appear to affect the wood initially in any significant way, though you'll have to blow off the dust every now and then. Repeat this same vigorous treatment every day for a month, and you'll wear down a smooth patch in the board to the point that it will easily break if minimal pressure is applied to that point. Apply this same principal to constant application of force from the water over time, and you can see how water, which is constanctly cycled across the surface of the world through atmospheric and environmental action, wears away the sharper features of terrain from large-scale events such as earthquakes and volcanoes, leaving rolling hills and soft valleys.
Wiki User
∙ 13y ago
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Which type of rock would likely be found at the bottom of a river bed?
sedimentary
Where do you find flint?
You can find flint by digging up gravel. There is a chance you will get a piece of flint from digging up one block of gravel, though most of the time you only get gravel. Gravel can be found in caves, by a river bank, and the bottom of the ocean (good luck digging up gravel down there!). Gravel really doesn't have much use, though it is known for making "gravel elevators." Flint, however, is used to make arrows for bows and arrows.
How much gravel do you need?
For a fish tank, you need enough gravel to make a thin layer on the bottom of the aquarium. For an outdoor walkway, you need much more.
What is Sedimentary rock is found in?
the solid material sattles at the bottom of a liquid is called sedimentary rock example when there is rain the small pieces of clay,gravel flow to river and streams etc there pieces are hardened and form sedimentry rock
What is found in a sedimentary rock?
the solid material sattles at the bottom of a liquid is called sedimentary rock example when there is rain the small pieces of clay,gravel flow to river and streams etc there pieces are hardened and form sedimentry rock
How do you recover placer gold?
Placer gold is found in river beds. The gold is heavy and settles and is concentrated in the river gravel. You mine it by digging up this gravel, placing it on a sluice with a rough bottom surface (e.g. a sheep fleece) and washing it down the sluice with river water. The gold gets trapped in the fleece and when this is dried the gold can be shaken out. You can also do the same thing (in smaller quantities) with a wooden or rusty metal miners pan (hence panning for gold).
What was a gold pan used for?
Panning for gold. You go to the river get a bit of water, some dirt from the bottom of the river and then swish it around and over the lip of the pan. Eventually, you may have bits of gold in the bottom of the pan because the gold is heavier than the water and of the sand/gravel from the river. It is a wet job.
Suppose sand gravel and clay are being carried by a river As the water enters a lake and slows down In what order will these sediments settle out of the water?
the sediment could change in order bto the types of erosions. as a river slows larger pieces settle first gravel settes first, then sand, and then tiny clay sized clay particles
Are dinosaurs bones found in swamps or rivers?
yes they are often found in bolders at the bottom of the river
What are the characteristics of siltstone?
its grainy like silt found in a river only the grains are made of stone so its like a smaller version of gravel
Where is one most likely to find rocks that have become smooth and rounded?
River beds.
When and how do brooke trout mate?
In the fall. Female makes a gravel "redd" by fanning on gravel to remove sediment and making a small indent in river bottom. Female lies on redd and then releases eggs. Males are eagerly waiting behind the female to fertilize! Whoo Hoo!
