How is a polje formed?
Polje, (Serbo-Croatian: “field”), elongated basin having a flat floor and steep walls; it is formed by the coalescence of several sinkholes.
How Uvala is different from polje?
The larger depressions, by dimension and form somewhere between a doline and a polje, are the uvala, but genetically they are closer to the doline. Polje (meaning a plain or field in Slavic languages) is the biggest closed depression, its bottom covering several hundreds of square kilometers.
Where is polje found?
They are mostly distributed in subtropical and tropical latitudes but some also appear in temperate or, rarely, boreal regions. Usually covered with thick sediments, called “terra rossa”, they are used extensively for agricultural purposes.
What is a karst aquifer?
Likewise, a karst aquifer is an aquifer that occurs within limestone geology, where the limestone (or other easily dissolved rock) has been partially dissolved so that some fractures are enlarged into passages that carry the groundwater flow. The location and size of these passages is unpredictable.
What is the meaning of Polje?
: an extensive depression having a flat floor and steep walls but no outflowing surface stream and found in a region having karst topography (as in parts of Yugoslavia)
What is a swallow hole geography?
A swallow hole is a funnel shaped point on the river bed down through which a stream or river flows underground. Distinctive landforms form including the swallow hole. FORMATION. Swallow holes form on the limestone bedrock of a river. The constant flow of water makes the limestone vulnerable to weathering.
What are uvala and karst towers?
Uvala is originally a local toponym used by people in some regions in Slovenia, Croatia, Bosnia and Herzegovina, Montenegro and Serbia. In geosciences it denotes a closed karst depression, a terrain form usually of elongated or compound structure and of larger size than that of sinkholes (dolines).
What hangs in the back of your throat?
Your uvula — the flesh that hangs in the back of your throat — helps you swallow and speak.
How is karst topography formed?
Karst is associated with soluble rock types such as limestone, marble, and gypsum. In general, a typical karst landscape forms when much of the water falling on the surface interacts with and enters the subsurface through cracks, fractures, and holes that have been dissolved into the bedrock.
What is the difference between a porous and karst aquifer?
Karst aquifers are different from sedimentary aquifers, where water flows mostly through the gravel and sand grains similar to a sponge. Porosity represents the volume of water a rock formation can potentially hold. Permeability is how well a fluid can flow within the pore spaces of the rock within the aquifer.
What causes karst?
In general, a typical karst landscape forms when much of the water falling on the surface interacts with and enters the subsurface through cracks, fractures, and holes that have been dissolved into the bedrock.
Is Polje a word?
POLJE is a valid scrabble word.
Where does the name polje karst come from?
This term, like so many others, comes from the Dinaric Karst, the word means the same in Croatian, Serbian and Slovenian, namely field . The flat bottom of the Polje is usually a fertile plain, where farming is very easy, unlike the surrounding barren hills of the Karst.
How big is a Polje in karst limestone?
A polje, in geological terminology, is a large, flat-floored depression within karst limestone, whose long axis develops in parallel with major structural trends and can become several miles (tens of kilometers) long. Superficial deposits tend to accumulate along the floor.
How big is the Karst Field in Croatia?
A polje (Cyrillic: поље, Serbo-Croatian: [pôʎe]), also karst polje or karst field, is a large flat plain found in karstic geological regions of the world, with areas usually 5 to 400 km².
Which is the biggest karst landform in Slovenia?
Lake Cerknica is an intermittent lake on Cerknica Polje, the biggest karst landform in Slovenia. The polje is a steep-walled and flat-floored elongated basin with area varying between 5 and 400 square km. Poljes are found in karst regions of the world.