Where do evaporites form?

Article by: Berta Feliciano | Last update: April 10, 2022
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Evaporites are sedimentary rocks that are formed by crystallization of dissolved salts in lakes and coastal seas. Crystallization requires the supersaturation of salt water by the salts it contains.

How do evaporite rocks form?

They are formed by growth of vertical palisade gypsum crystals, arranged in successive sheets. They form in seasonal ponding areas of sulphated waters subject to important evaporation processes.

What is an Evaporitic?

Relating to evaporite, a class of sedimentary minerals and sedimentary rocks that form by precipitation from an evaporating aqueous fluid.

How do salt rocks form?

Salt rocks or evaporites are formed by evaporation of salt water. When water from the sea or from inland lagoons evaporates, dissolved salts precipitate. The most common are limestone, halite, anhydrite and gypsum. The siliceous rocks of chemical precipitation, among them are flint and flint.

What are Evaporitic minerals?

The evaporite minerals that indicate dry events (salinity and evaporation) are carbonates, sulfates and chlorides of Na, K, Ca and Mg. The occurrence of double salts, such as glauberite, carnallite, kainite, gaylusite, pirssonite, burkeite, etc., suggests disequilibrium conditions.

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What are the evaporitic resources in Bolivia?

Bolivia has numerous salt flats and lagoons from which evaporite minerals can be obtained. The Salar de Uyuni has 10,000 square kilometers and is the largest lithium reserve in the world. The Coipasa salt flat is 3,300 square kilometers and is rich in potassium salts.

What are the Organogenic rocks?

Organogenic rocks: are those sedimentary rocks that have been formed with the remains of living beings. Two types are distinguished within the organogenic sedimentary rocks according to their material: Formed by biomineralization processes: composed from the skeletons of living beings.

How organic sedimentary rocks are formed?

Organic sedimentary rocks are formed by the process of accumulation, diagenesis and lithification of plant remains and some living beings (mainly microorganisms).

How are plutonic rocks formed?

Plutonic rocks or intrusive rocks are those that form from slow cooling, at great depth and in large masses of magma. They are one of the two types in which igneous rocks are classified based on their origin.

Where is rock slate found?

The most important deposits that are currently exploited are found in the Hercynian mountain range that runs through Europe. Spain is the country in the world with the largest reserves of tectonic slate. It is estimated that approximately 90% of the natural slate used in construction is obtained in Spain.

What is a conglomerate material?

For geology, a conglomerate is a mass that is formed by rounded fragments of different rocks or mineral substances that are joined by a cement. It is a sedimentary rock of the detrital type, with constituent fragments that are larger than those of sand.

Where is siderite found?

Very often it is found in sedimentary bed deposits mixed with some biological component, shales, clays or coal, which suggests that siderite is biogenically created It can also be found in metamorphosed sedimentary rocks forming massive crystalline masses, as the main mineral of .. .

What is the difference between volcanic and plutonic rocks?

Place of origin: volcanic rocks originate, as we have already learned, from the cooling of lava on the earth’s surface, while plutonic rocks originate from the solidification of magma below the earth’s crust.

How are plutonic rocks classified?

The classification of plutonic rocks is based on the relative proportions of their main components (which are a function of the original composition of the magma). In a very simple way, the big groups are the following: Acids and intermediates.

How are sedimentary rocks formed and examples?

Sedimentary rocks are formed thanks to the precipitation and accumulation of minerals from a solution (from liquids) or, thanks to the compaction of the remains of living beings (both animals and plants) that are compacted until they consolidate into hard rocks.

What are the 3 types of sedimentary rocks?

Sedimentary rocks are generally classified, according to the way they are produced, as detrital or clastic, and chemical or non-clastic; Within the latter, there is a subcategory known as biochemical.

How are sedimentary rocks formed, their classification and 2 examples?

Sedimentary rocks can be defined as those rocks that originate from processes of erosion, weathering, transport, sedimentation and diagenesis of pre-existing rocks, whether they are igneous, metamorphic and even sedimentary rocks. These materials can lithify, giving rise to a sedimentary rock.

What types of metamorphic rocks exist?

1 Metamorphic rocks can be foliated or non-foliated.

There are two types of metamorphic rocks if they attend to two types of classifications: the minerals that form them and the textures they present. The textures of these rocks are basically two: foliated and non-foliated.

What is an inorganic rock?

Rocks originating from the transport and deposition of materials as a result of the action of wind, water, ice or chemically deposited from an aqueous fluid. Also included in this definition are the accumulation of inorganic materials such as shells secreted by organisms.

What is lithium in Bolivia?

Following the extractivist trend that has caused so much concern in Bolivia, one of the most valuable materials in recent years has been added to the many riches of the Bolivian soil. Lithium, known as the lightest metal, forms one of the most important components of the Salar de Uyuni, in the Potosí region.

What is lithium in Bolivia?

The largest Bolivian lithium deposits are found in the Salar de Uyuni, belonging to the department of Potosí. The salt flat, located at a height of 3,670 m, is one of the largest in the world and its salt crust covers an area of ​​10,000 km² (180 km long and 80 km wide).

What is YLB in Bolivia?

YLB – Bolivian Lithium Deposits.

What is volcanic rock?

When magmas reach the Earth’s surface and cool and crystallize in subaerial or subaquatic conditions, the resulting rocks are called extrusive or volcanic. Igneous rocks are made up of minerals from the silicate group.

What are the characteristics of volcanic rocks?

Volcanic rocks are a type of rock formed when lava or magma cools. This rapid cooling causes small crystals (so-called microcrystals) to form in the rock, which gives it a crystal-like appearance, as we can see in obsidian.

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