What ocean zone does the beluga whale live in?
I would guess mostly the open ocean surface zone, maybe sometimes the neritic zone. Compare how deep Belugas go to ocean zone depths. http://www.mysticaquarium.org/index.cgi/... The record depth for beluga whales is 1100 m (3500 ft) although it is not believed that these are feeding dives, but rather ways to find routes through very heavy ice. Belugas have been seen making repeated feeding dives to the bottom in spots that are 350-500 m (1200-1600 ft) deep. They frequently leave the frigid ocean to enter estuaries and freshwater rivers to molt. http://www.defenders.org/wildlife_and_ha... Belugas forage for food on the seabed. This typically takes place at depths of up to 1,000 feet, but they can dive to at least twice this depth. http://www.georgiaaquarium.org/animalgui... It is typically found in shallow waters to depths of 3,000 feet. http://www.oceanconservancy.org/site/PageServer?pagename=fw_belugawhales They are deep divers, allowing them to forage on the seabed in water depths of at least 1,000 feet. zones: http://www.mos.org/oceans/life/index.html http://en.wikipedia.org/wiki/Pelagic_zone http://www.lhs.sad49.k12.me.us/ljhs/Website%20Resources/ocean__zones.htm
What are some of the processes that allow a river to change from a young river to a mature river?
It takes time for anything to transition from 'young' to 'mature' (this nomenclature was given by us, humans for our comprehension). When the water erodes its bed (of the river) and the banks as well as the basin (by flooding, changing the course) it reaches; 'Maturity'.
What are a river's three stages?
Nearly all rivers have an upper, middle, and lower course.Young River - the upper courseThe beginning of a river, when it flows quickly with lots of energy, is called a young river. The river here is smaller and usually has a rapid, tumbling flow that cuts a narrow channel through rocky hills or mountains.The fast flowing river can create waterfalls where it carves out layers of soft rock and leaves a cliff of hard rock standing.Middle Aged River - the middle courseThe middle of a river’s journey, when it gets wider and slows down, is called the middle age.Rivers often meander (follow a winding path) along their middle course.The current of the river no longer has the force to carry stones or gravel. This material drops to the riverbed, where it forms bars of sand or gravel or builds islands.Old River - the lower courseWhen the river reaches the end of its journey, it is called an old river. The end of the river is called the mouth.At the mouth, there is often a river delta, a large, silty area where the river splits into many different slow-flowing channels that have muddy banks.The photograph below show the sediment (mud) that the Darent has brought with it on its journey to the River Thames.
What is the difference between an antecedent river and a superimposed river?
Antecedent River or Inconsequent drainage:As the meaning of word Antecedent is "a thing that existed before".. so here my friend it relates to the river.In simple words these rivers are those which are flowing in their usual path but then .. Boom…. the earth starts upheaval (making mountains, gradually) but the rivers were stubborn so, they just cut their courses through the mountain making gorges in mountains.In India, examples are Ganga, Satluj, Indus etc. which passes through the great Himalayas.Pic of Antecedent river :Superimposed or Epigenetic or Superinduced Drainage:Originally the land (can be hard rock or soft rock or both) was there without river flowing on it. But as the years passed the land got covered by some depositions years later, river start following on that cover but years later due to erosion that temporary cover removed due to erosion…. but the rivers got a swag so they retained their original course unaffected by the newly exposed structure (the river don’t give a damn to the structure ).So, if we go by the meaning of the word superimposed "lay one thing over another"…. here the lake is superimposed over the structure previously buried i.e. before erosion.In India, examples are the Damodar, Subernarekha, Chambal etc.Pic of superimposed river :Hope it will help you. :).
Difference between beach sand and desert sand?
Dune sands generally consist of finer grained materials than beach sands. The reason is that the wind is not as capable of picking up the larger grains compared with the currents along a beach. In addition, dune sands are also better sorted than beach sands. The wind is a better sorting agent, meaning it is capable of picking up fine grained sand but can not transport the coarser sands as well. The result is that dune sands show a very marked consistancy in size. Of course there are exceptions to every rule but what I have said above is the normal situation. Here is a link to pictures and descriptions of beach, dune as well as river sands: http://gccweb.gccaz.edu/earthsci/imagear... You could also check out this short PowerPoint on sands at: http://gccweb.gccaz.edu/earthsci/imagear...
Why do rivers tend to flow in a S shaped way?
From the point the river originates to the point where it assimilates into the ocean, its path can be divided in THREE parts on the basis of GROUND SLOPE ( in layman's terms, decrease in elevation with respect to sea level). These parts are -1. Young Stage. ( High ground slope, in hilly regions.)2. Mature Stage ( Mild slope, in areas lying next to hilly areas.)3. Old Stage. ( Slight slope, in areas adjacent to sea/ocean.) The S shape that you are talking about MAY or MAY NOT be present in a river but in case it is present, it is present only in MATURE STAGE and it is called a MEANDERING RIVER if it flows in the S shape. Meander means shape of a snake's body when it moves ( the S shape). Coming to Cause of S - shapes or meanders as we call them in Geography, initially they are formed in a very gentle magnitude ( just a little curve in the straight trajectory of river) because of differential resistance of soil forming the banks on the both sides. Please notice that soil varies a lot in composition and it is highly unlikely that even both the banks of a river have exactly similar composition or in other terms - resistance to flow or erosion. After a gentle curve is formed, the coming water with all its momentum keeps on hitting the CONCAVE side resulting in increasing the degree of curve. Sometimes the river makes a complete curve rejoins the original trajectory leaving behind "temporary" curved lakes called OX BOW lakes. Hope it helps.
What feature might help you distinguish a rejuvenated river from a young river?
Incised meanders
Manga genre meanings....?
there are so many different types of genre for manga, i roughly know wat some of them are but could someone explain to me wat they all mean, for example all the genres on managfox mean? or could u provide a site which explains it? thanks for your help :)