Extremely Retrospective Views: The Genetic And Evolutionary Issue
If an age of karst depressions larger than dolines beyond 2,6 Ma is possible, that is: depression development may possibly have started in Pliocene or even in Miocene, then depressions were already formed in Europe’s tropical climates.
However, even if a very high age of a depression is assumed, which karst form will emerge? Very similar genetic factors can lead to the development of different forms, depending on the conditions within a karst area, ali p. 166f.
What Is Basin In A Sentence
Considering this, what is the definition of basin in geography?
A basin is a depression, or dip, in the Earth’s surface. Basins are shaped like bowls, with sides higher than the bottom. The major types of basins are river drainage basins, structural basins, and ocean basins. River Drainage Basins. A river drainage basin is an area drained by a river and all of its tributaries.
One may also ask, what is the synonym of basin? Synonyms: washstand, river basin, washbowl, lavatory, drainage area, watershed, drainage basin, catchment basin, catchment area, washbasin, basinful. basin, basinful the quantity that a basin will hold.
Similarly one may ask, what is the use of basin?
A basin is a container that holds water and is used for washing, but you probably just call it your bathroom sink. You can think of basinas something shaped like a bowl. If you’re going for an old-fashioned ring, say “wash basin.” If you’re in England, you might use a basin for cooking.
What is the meaning of drainage basin?
Drainage basin, also called catchment area, or watershed, area from which all precipitation flows to a single stream or set of streams.
Examples Of Geography In A Sentence
geographygeographygeographyForbesgeography USA TODAYgeography chicagotribune.comgeography Washington Postgeography Anchorage Daily NewsgeographyNew York TimesgeographyLos Angeles Timesgeography Star Tribune
These example sentences are selected automatically from various online news sources to reflect current usage of the word ‘geography.’ Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
You May Like: Clinical Psychology Subfields
Where Are Depression Formed
Research suggests that depression doesnt spring from simply having too much or too little of certain brain chemicals. Rather, there are many possible causes of depression, including faulty mood regulation by the brain, genetic vulnerability, stressful life events, medications, and medical problems.
Examples Of Depression In A Sentence
depressiondepressiondepressiondepressionsdepression orlandosentinel.comdepression Los Angeles TimesdepressionThe New YorkerdepressionThe New York Review of Booksdepression PEOPLE.comdepressionVoguedepressionWSJdepression Anchorage Daily News
These example sentences are selected automatically from various online news sources to reflect current usage of the word ‘depression.’ Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Anticyclones Depressions And Fronts
Part B Fronts
A front is a boundary between two different types of air masses, these are normally warm moist air masses from the tropics and cooler drier air masses from polar regions. Fronts move with the wind so over the UK they normally move from west to east. The notes below provide information about the most common types of fronts. The descriptions given apply to active well developed fronts, weaker fronts may not display all the characteristics or they may be less well defined.
A warm front indicates that warm air is advancing and rising up over the colder air. This is because the warm air is lighter or less dense, than the cold air. Therefore warm fronts occur where warmer air is replacing cooler air at the surface. As the warm front approaches there is a gradual deterioration in the weather. Clouds gradually lower from higher cirrus, through altostratus, to stratus and nimbostratus at the front. There is often a prolonged spell of rainfall which is often heavy. Behind the warm front the rain becomes lighter, turns to drizzle or ceases, but it remains cloudy. Temperatures rise behind the warm front and winds turn clockwise, also known as a wind veer. Pressure falls steadily ahead of and during the passage of the warm front, but then rises slowly after its passage.
The diagram below shows the formation of a warm front in diagrammatic form.
The diagram below shows the formation of a cold front in diagrammatic form.
Do Uvalas Have Global Relevance
ali’s work and resulting definition affirms that Dinaric uvalas are karst forms in their own right. The question remains whether this is relevant globally and in different climates. Possibly the postulate of Lehmann that Dinaric Karst is not representative for karst worldwide , with respect to uvalas must be re-examined.
In the comprehensive karst modelling of Ford& Williams uvalas are irrelevant. Yet, they consider the term uvala indispensable and use it no less than six times to describe karst phenomena found in different epochs, climates and regions of various continents, in some cases with reference to other authors.
A German publication lists fifty-seven Karstwannen on the Swabian Alb, Bayer& Groschopf . Together with a few more on the karstic Franconian Jura, there may well be about 70 large depressions, half of which are 1000-4500m in length. According to Bayer& Groschopf, p. 182 sind Karstwannen eher mit Uvalas denn mit Poljes zu korrelieren, entsprechen von der geomorphologischen Ausformung dem Uvala Charakter. .
Pfeiffer discusses Karstwannen of the Swabian Alb, the Franconian Jura and those of the Causses . Die Karstwannen sind eigenständige Formen, die eine zeitweise großflächige Tieferlegung der Gesteinsoberfläche belegen, S. 210 . Yet considering the terms uvala or polje, he is undecided, mainly because
New Definition Of Uvala
ali defines uvala as follows:The term uvala must be excluded from such contexts, because they discredit its true meaning. At this stage of research, it can be concluded that uvalas are large karst closed depressions of irregular or elongated plan form resulting from accelerated corrosion along major tectonically broken zones. Their bottoms are undulating or pitted with dolines, seldom flattened by colluvial sediments and always situated above the karst water table. small seasonal sinking streams or, ponds are very rare, an exception rather than a rule. The depressions of this kind are not present on karst levelled surfaces, but only in areas with more or less dissected relief they are forms of accelerated corrosion not as points as dolines, but linear or areal .ali and ali .
- ali in a nut shell: There are deficits in most previous uvala-definitions. The revision was overdue. It re-introduces uvalas into modern karstology!
The second edition of the Encyclopedia of Caves, Culver& White , amongst others, added the keyword Dinaric Karst, Geography and Geology, Zupan Hanja , while U. Sauro revised his keyword Closed Depressions in part, so that both authors now fully endorse ali’s revival of the term karstic uvala.
How Does The Weather Change As A Depression Passes Over
Also Check: How To Beat Theory Of Everything 2
Tropical Depression Forms In The Arabian Sea
An interesting fact about the present depression is that it is the first-ever to form in the Arabian Sea in October after seven years
Come October and India faces the threat of tropical cyclones which form in the Bay of Bengal and sometimes even in the Arabian Sea.
Fortunately, this year there is not much activity going on in the Bay of Bengal and the Arabian Sea. The cyclone season is quieter compared to previous years.
What is forming in the Arabian Sea?
But there is something cooking in the Arabian Sea at present. A tropical depression has formed in the Arabian Sea.
On Friday morning, this depression was located near 14°N and 70.3°E, about 410 km west-southwest of Goa and 630 km south-southwest of Mumbai.
The mean sea-level pressure at the centre of this low pressure is estimated to be around 1004 millibar by the Thai Meteorological Department. The maximum wind speed at the centre is estimated to be around 30 knot as per the US Naval Research Laboratory.
As per the IMD, a depression is a low pressure which has an associated wind speed of 32-50km/hour. As per their scale, under favourable conditions, a low pressure in the sea intensifies into a depression, then into a deep depression and then into a cyclonic storm and so on.
Why the Bay of Bengal is more vulnerable?
Why Is Polar Front Jet Stream Important
As a component of the planetary-scale prevailing westerly circulation, the polar-front jet stream steers storms across the country. Hence, storms generally move from west to east. The polar-front jet stream is like a high-speed river of air in the upper atmosphere. It separates warm and cold regions at Earths surface.
Read Also: Exponent Rules Worksheet Answer Key
Countries With Absolute Geographical Depressions
Around the planet there are many geographic depressions, but only 33 countries have absolute geographical depressions, that is, land areas located below sea level.
The Netherlands is perhaps one of the most representative territories of this group. About two-thirds of the territory covered by the Netherlands is about 4 meters below sea level.
Thanks to a complex drainage system, the construction of dams and the continuous renovation and monitoring of highly populated geographic depressions, the Netherlands has managed to remain safe from floods.
In the United States, the area known as the Death Valley is considered a great geographic depression, as it is located at about -86 meters above sea level. It is called Valle de la Muerte because of the high temperatures that occur in this territory.
The lowest point of the earth lies in the so-called Dead Sea depression, with -413 meters above sea level. This geographical area contains the Dead Sea, a part of the Jordan River, the Sea of Galilee and various communities.
Other countries with absolute geographical depressions are Japan, Libya, Denmark, Spain, Algeria, Tunisia, Morocco, Australia, among others.
Dating With Modern Techniques In The Swabian Alb
Results for a reliable age were achieved, e.g., by combining uranium-thorium dating, paleo geological and paleontological dating in sediment beddings inside the cave de:Karls- und Bärenhöhle on the Swabian Alb, Germany. The isotope-method yielded an age of ca. 450 thousand years . Taking into account fossil analysis, a denudation rate, the local and regional lithology and the position of the primeval river cave high above the recent valley bottom, the age of the cave was determined to be roughly five million years , Ufrecht/Abel .
In 2006 fossil remains in sediments of unroofed caves of the Middle Swabian Alb were successfully dated, Ufrecht . The remains of large land-mammals of seven genera were lithologically and bio-stratigraphically classified into the biozones MN1 to MN17 of the European Land Mammal Mega Zones table. These found genera overlapped only in MN9, which is ca. eleven Ma.
Don’t Miss: Algebra 1 Age Word Problems
What Is The Meaning Of Depression In Geography
A depression is an area of low pressure which moves from west to east in the northern hemisphere. Low pressure systems can be identified from a synoptic chart due to: cold fronts. warm fronts. … isobars showing pressure decreasing towards the centre from about 1004mb.
What Is The Weather Like During A Summer Anticyclone
Summer anticyclones bring very different weather. As the air descends it is heated causing water in the air to evaporate. Therefore there are few clouds in the air. The skies are clear allowing the suns rays to reach the surface of the earth. This causes temperatures to rise. Heat waves can occur if anticyclones remain over Britain for a number of weeks.
Read Also: Find The Length Indicated Geometry
What Are Side Effects Of Cbd Gummies
Though its often well-tolerated, CBD can cause side effects, such as dry mouth, diarrhea, reduced appetite, drowsiness and fatigue. CBD can also interact with other medications youre taking, such as blood thinners. Another cause for concern is the unreliability of the purity and dosage of CBD in products.
What Is A Drainage Basin In Geography
river basindrainage basinriverdrainage basinbasin
What is meant by drainage basin?
Drainage basin, also called catchment area, or watershed, area from which all precipitation flows to a single stream or set of streams. The boundary between drainage basins is a drainage divide: all the precipitation on opposite sides of a drainage divide will flow into different drainage basins.
what is the source of a drainage basin?the edge
Read Also: Geometry Angle Addition Worksheet
New Contributions Of Technical Sciences
Large closed karst depressions are an important phenomenon on all continents, yet their analysis apart from and beyond dolines is rare. Assessing the potential of new knowledge, especially on the question of the genesis and evolution of large depressions, is very difficult. Possibly the studies of geological dating, interdisciplinary Tectonics, Seismotectonics and Climatology will open a window to look into earlier periods of evolution.
The recent progress in methods and measuring techniques in the sciences with the regard to geological objects allows dating in dimensions of several hundred thousand or even million years with high precision.
Some progress in dating was made by ensuring that examined sediment probes and fossils have not only been exposed to surface, where denudation, weathering or corrosion are in effect. Rather allochthonous objects, objects which were moved and washed into cavities, transported into fissures or caves might be archive elements of early karst activity and tectonic stages of nearby large closed depressions.
Characteristics And Causes Of Depression
Depression is probably the most common psychiatric complaint and has been described by physicians since before the time of ancient Greek physician Hippocrates, who called it melancholia. The course of the disorder is extremely variable from person to person it may be mild or severe, acute or chronic. Untreated, depression may last an average of four months or longer. Depression is twice as prevalent in women than in men. The typical age of onset is in the 20s, but it may occur at any age.
Depression can have many causes. Unfavourable life events can increase a persons vulnerability to depression or trigger a depressive episode. Negative thoughts about oneself and the world are also important in producing and maintaining depressive symptoms. However, both psychosocial and biochemical mechanisms seem to be important causes the chief biochemical cause appears to be the defective regulation of the release of one or more naturally occurring neurotransmitters in the brain, particularly norepinephrine and serotonin. Reduced quantities or reduced activity of these chemicals in the brain is thought to cause the depressed mood in some sufferers.
Research suggests that depression is also linked to physical activity, whereby physical activity may lower a persons risk of developing depression. Individuals who exercise typically report better mental health and are less likely to be depressed, compared with individuals who do not exercise.
Recommended Reading: Geometry Segment Addition Postulate Worksheet
Uvalas In Early Karstology
Thanks to the research work of the Serbian geographer Jovan Cviji , the protégé of Albrecht Penck , the word uvala like the words karst, dolina or polje, popular terms of the Dinarides became an established international standard. As the father of Karst Morphology and Hydrogeology, Cviji envisioned the phenomena of karstology in his publications, first in regions of Europe and then all over the world.
Early karstologists like Cviji believed the long-term processes of evolution of each karst depression could be explained in cyclic theories:
Dolines evolve into uvalas, and uvalas into poljes.
However, the increasing body of literature and data collected on karst on all continents, and the global insight that climate ought to be considered as an essential genetic factor in all karst analysis, raised growing concern that this definition may be unsatisfactory.
Causes Of Geographical Depressions
There are various causes and factors involved in generating a geographical depression, whether relative or absolute.
Most large-scale geological depressions are related to tectonic plates and their movement, while other depressions are generated by the destabilization of the terrain due to erosion, volcanic activity, human action or climate, among others.
We can classify the causes of the generation of geographical depressions in several groups, among which we find:
- Geographical depressions related to soil erosion.
- Geographic depressions related to the collapse of the terrain.
- Geographical depressions related to an impact on the ground.
- Geographic depressions related to sediments in the terrain.
- Geographical depressions related to tectonic movements.
When it comes to a slow movement of land destabilization we speak of geographical depressions generated by subsidence that is, according to geology, the progressive collapse of the land.
Among the depressions related to subsidence are those that are generated by wind erosion, typical in arid ecosystems . Also found are those depressions generated by erosion in glacial terrain and river valleys.
The endorheic basins are also part of the depressions formed by subsidence. An endorheic basin is an area where the water does not have a fluvial outlet to the ocean. This generates the accumulation of salts that end up destabilizing the terrain and derive in the generation of geographic depressions.
Read Also: Is Ap Biology Easy