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Deriba (caldera), the Glossary

91 relations: Aeolian processes, African sacred ibis, Afromontane, Bahr al-Arab, Basalt, Before Present, Brachionus plicatilis, Caldera, Canyon, Chari River, Chloride, Coast, Common greenshank, Copepod, Cretaceous, Cyanobacteria, Darfur, Darfur Dome, Desert, Diatom, Ephedra (medicine), Extinction, Fresh water, Fumarole, Fur, Fur people, Gneiss, Haunted house, Holocene, Hot spring, Humid subtropical climate, Ignimbrite, Jet stream, Lake Chad, Lapilli, Lava, Limestone, Lineament, List of elevation extremes by country, Little grebe, Magmatic water, Mantle plume, Marrah Mountains, Mediterranean Sea, Meidob volcanic field, Melosira, Metamorphic rock, NASA Earth Observatory, Nubian Sandstone, Nyala, South Darfur, ... Expand index (41 more) »
Calderas of Africa
Darfur
Marrah Mountains
VEI-4 volcanoes
Volcanoes of Sudan

Aeolian processes

Aeolian processes, also spelled eolian, pertain to wind activity in the study of geology and weather and specifically to the wind's ability to shape the surface of the Earth (or other planets).

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African sacred ibis

The African sacred ibis (Threskiornis aethiopicus) is a species of ibis, a wading bird of the family Threskiornithidae.

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The Afromontane regions are subregions of the Afrotropical realm, one of the Earth's eight biogeographic realms, covering the plant and animal species found in the mountains of Africa and the southern Arabian Peninsula.

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Bahr al-Arab

The Bahr al-Arab (بحر العرب) or Kiir River (Dinka) is a river which flows approximately through the southwest of Sudan and marks part of its international border with South Sudan. Deriba (caldera) and Bahr al-Arab are Darfur.

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Basalt

Basalt is an aphanitic (fine-grained) extrusive igneous rock formed from the rapid cooling of low-viscosity lava rich in magnesium and iron (mafic lava) exposed at or very near the surface of a rocky planet or moon.

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Before Present

Before Present (BP) or "years before present (YBP)" is a time scale used mainly in archaeology, geology, and other scientific disciplines to specify when events occurred relative to the origin of practical radiocarbon dating in the 1950s.

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Brachionus plicatilis

Brachionus plicatilis is a euryhaline (tolerate a wide range of salinity) rotifer in the family Brachionidae, and is possibly the only commercially important rotifer, being raised in the aquaculture industry as food for fish larvae.

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Caldera

A caldera is a large cauldron-like hollow that forms shortly after the emptying of a magma chamber in a volcanic eruption.

See Deriba (caldera) and Caldera

Canyon

A canyon (from; archaic British English spelling: cañon), gorge or chasm, is a deep cleft between escarpments or cliffs resulting from weathering and the erosive activity of a river over geologic time scales.

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Chari River

The Chari River, or Shari River, is a long river, flowing in Central Africa.

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Chloride

The term chloride refers to a compound or molecule that contains either a chlorine ion, which is a negatively charged chlorine atom, or a non-charged chlorine atom covalently bonded to the rest of the molecule by a single bond.

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Coast

A coastalso called the coastline, shoreline, or seashoreis the land next to the sea or the line that forms the boundary between the land and the ocean or a lake.

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Common greenshank

The common greenshank (Tringa nebularia) is a wader in the large family Scolopacidae, the typical waders.

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Copepod

Copepods (meaning "oar-feet") are a group of small crustaceans found in nearly every freshwater and saltwater habitat.

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Cretaceous

The Cretaceous is a geological period that lasted from about 145 to 66 million years ago (Mya).

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Cyanobacteria

Cyanobacteria, also called Cyanobacteriota or Cyanophyta, are a phylum of autotrophic gram-negative bacteria that can obtain biological energy via oxygenic photosynthesis.

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Darfur

Darfur (Fur) is a region of western Sudan.

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Darfur Dome

Darfur Dome or Darfur Volcanic Province is an area of about 100x400 km in Western Sudan. Deriba (caldera) and Darfur Dome are Darfur and Volcanoes of Sudan.

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Desert

A desert is a landscape where little precipitation occurs and, consequently, living conditions create unique biomes and ecosystems.

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Diatom

A diatom (Neo-Latin diatoma) is any member of a large group comprising several genera of algae, specifically microalgae, found in the oceans, waterways and soils of the world.

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Ephedra (medicine)

Ephedra is a medicinal preparation from the plant Ephedra sinica.

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Extinction

Extinction is the termination of a taxon by the death of its last member.

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Fresh water

Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids.

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Fumarole

A fumarole (or fumerole) is a vent in the surface of the Earth or another rocky planet from which hot volcanic gases and vapors are emitted, without any accompanying liquids or solids.

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Fur

Fur is a thick growth of hair that covers the skin of almost all mammals.

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Fur people

The Fur (Fur: fòòrà, Arabic: فور Fūr) are an ethnic group predominantly inhabiting Darfur, the western part of Sudan, where they are the largest ethnic group. Deriba (caldera) and Fur people are Darfur.

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Gneiss

Gneiss is a common and widely distributed type of metamorphic rock.

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Haunted house

A haunted house, spook house or ghost house in ghostlore is a house or other building often perceived as being inhabited by disembodied spirits of the deceased who may have been former residents or were otherwise connected with the property.

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Holocene

The Holocene is the current geological epoch, beginning approximately 11,700 years ago.

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Hot spring

A hot spring, hydrothermal spring, or geothermal spring is a spring produced by the emergence of geothermally heated groundwater onto the surface of the Earth.

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Humid subtropical climate

A humid subtropical climate is a temperate climate type characterized by hot and humid summers, and cool to mild winters.

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Ignimbrite

Ignimbrite is a type of volcanic rock, consisting of hardened tuff.

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Jet stream

Jet streams are fast flowing, narrow, meandering air currents in the atmospheres of the Earth, Venus, Jupiter, Saturn, Uranus, and Neptune.

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Lake Chad

Lake Chad (Kanuri: Sádǝ) is an endorheic freshwater lake located at the junction of four countries: Nigeria, Niger, Chad, and Cameroon in western and central Africa respectively, with a catchment area of.

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Lapilli

Lapilli (lapillus) is a size classification of tephra, which is material that falls out of the air during a volcanic eruption or during some meteorite impacts.

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Lava

Lava is molten or partially molten rock (magma) that has been expelled from the interior of a terrestrial planet (such as Earth) or a moon onto its surface.

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Limestone

Limestone (calcium carbonate) is a type of carbonate sedimentary rock which is the main source of the material lime.

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Lineament

See also Line (geometry) A lineament is a linear feature in a landscape which is an expression of an underlying geological structure such as a fault.

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List of elevation extremes by country

The following sortable table lists land surface elevation extremes by country or dependent territory.

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Little grebe

The little grebe (Tachybaptus ruficollis), also known as dabchick, is a member of the grebe family of water birds.

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Magmatic water

Magmatic water, also known as juvenile water, is an aqueous phase in equilibrium with minerals that have been dissolved by magma deep within the Earth's crust and is released to the atmosphere during a volcanic eruption.

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Mantle plume

A mantle plume is a proposed mechanism of convection within the Earth's mantle, hypothesized to explain anomalous volcanism.

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Marrah Mountains

The Marrah Mountains or Marra Mountains (Fur, Fugo Marra; جبل مرة, Jebel Marra) are a range of volcanic peaks in a massif that rises up to. Deriba (caldera) and Marrah Mountains are Darfur and Volcanoes of Sudan.

See Deriba (caldera) and Marrah Mountains

Mediterranean Sea

The Mediterranean Sea is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean Basin and almost completely enclosed by land: on the north by Southern Europe and Anatolia, on the south by North Africa, on the east by the Levant in West Asia, and on the west almost by the Morocco–Spain border.

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Meidob volcanic field

Meidob volcanic field is a Holocene volcanic field in Darfur, Sudan. Deriba (caldera) and Meidob volcanic field are Darfur and Volcanoes of Sudan.

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Melosira

Melosira is a genus of diatoms belonging to the family Melosiraceae.

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Metamorphic rocks arise from the transformation of existing rock to new types of rock in a process called metamorphism.

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NASA Earth Observatory

NASA Earth Observatory is an online publishing outlet for NASA which was created in 1999.

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Nubian Sandstone

The Nubian Sandstone is a variety of sedimentary rock deposited on the Precambrian basement in the eastern Sahara, north-east Africa and Arabian Peninsula.

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Nyala, South Darfur

Nyala (Daju: "the place of chatting") is the capital of the state of South Darfur in the south-west of Sudan. Deriba (caldera) and Nyala, South Darfur are Darfur.

See Deriba (caldera) and Nyala, South Darfur

Obsidian

Obsidian is a naturally occurring volcanic glass formed when lava extruded from a volcano cools rapidly with minimal crystal growth.

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Oceanic climate

An oceanic climate, also known as a marine climate or maritime climate, is the temperate climate sub-type in Köppen classification represented as Cfb, typical of west coasts in higher middle latitudes of continents, generally featuring cool to warm summers and cool to mild winters (for their latitude), with a relatively narrow annual temperature range and few extremes of temperature.

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Orogeny

Orogeny is a mountain-building process that takes place at a convergent plate margin when plate motion compresses the margin.

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Oxygen

Oxygen is a chemical element; it has symbol O and atomic number 8.

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Pan-African orogeny

The Pan-African orogeny was a series of major Neoproterozoic orogenic events which related to the formation of the supercontinents Gondwana and Pannotia about 600 million years ago.

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Pleistocene

The Pleistocene (often referred to colloquially as the Ice Age) is the geological epoch that lasted from to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations.

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Plinian eruption

Plinian eruptions or Vesuvian eruptions are volcanic eruptions marked by their similarity to the eruption of Mount Vesuvius in 79 AD, which destroyed the ancient Roman cities of Herculaneum and Pompeii.

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Potassium

Potassium is a chemical element; it has symbol K (from Neo-Latin kalium) and atomic number19.

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Pumice

Pumice, called pumicite in its powdered or dust form, is a volcanic rock that consists of extremely vesicular rough-textured volcanic glass, which may or may not contain crystals.

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Pyroclastic flow

A pyroclastic flow (also known as a pyroclastic density current or a pyroclastic cloud) is a fast-moving current of hot gas and volcanic matter (collectively known as tephra) that flows along the ground away from a volcano at average speeds of but is capable of reaching speeds up to.

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Pyroclastic rock

Pyroclastic rocks are clastic rocks composed of rock fragments produced and ejected by explosive volcanic eruptions.

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Rotifer

The rotifers (from the Latin rota, "wheel", and -fer, "bearing"), commonly called wheel animals or wheel animalcules, make up a phylum (Rotifera) of microscopic and near-microscopic pseudocoelomate animals.

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Sahel

The Sahel region or Sahelian acacia savanna is a biogeographical region in Africa.

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Salt

In common usage, salt is a mineral composed primarily of sodium chloride (NaCl).

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Schist

Schist is a medium-grained metamorphic rock showing pronounced schistosity.

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Semi-arid climate

A semi-arid climate, semi-desert climate, or steppe climate is a dry climate sub-type.

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Shield volcano

A shield volcano is a type of volcano named for its low profile, resembling a shield lying on the ground.

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Sink

A sink is a bowl-shaped plumbing fixture for washing hands (also known as washbasin in the UK), dishwashing, and other purposes.

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Sodium

Sodium is a chemical element; it has symbol Na (from Neo-Latin natrium) and atomic number 11.

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South Sudan

South Sudan, officially the Republic of South Sudan, is a landlocked country in East Africa.

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Spirulina (genus)

Spirulina is a genus of cyanobacteria.

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Stilt

Stilt is a common name for several species of birds in the family Recurvirostridae, which also includes those known as avocets.

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Storm drain

A storm drain, storm sewer (United Kingdom, U.S. and Canada), surface water drain/sewer (United Kingdom), or stormwater drain (Australia and New Zealand) is infrastructure designed to drain excess rain and ground water from impervious surfaces such as paved streets, car parks, parking lots, footpaths, sidewalks, and roofs.

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Stream

A stream is a continuous body of surface water flowing within the bed and banks of a channel.

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Sudan

Sudan, officially the Republic of the Sudan, is a country in Northeast Africa.

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Tagabo Hills

The Tagabo Hills is a volcanic field in the region of Darfur in Sudan. Deriba (caldera) and Tagabo Hills are Darfur and Volcanoes of Sudan.

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Temperate climate

In geography, the temperate climates of Earth occur in the middle latitudes (approximately 23.5° to 66.5° N/S of Equator), which span between the tropics and the polar regions of Earth.

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Tibesti Region

Tibesti Region (مقاطعة تيبستي) is a region of Chad, located in far northwest of the country.

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Trachyte

Trachyte is an extrusive igneous rock composed mostly of alkali feldspar.

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Tropical cyclone

A tropical cyclone is a rapidly rotating storm system with a low-pressure center, a closed low-level atmospheric circulation, strong winds, and a spiral arrangement of thunderstorms that produce heavy rain and squalls.

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Trou au Natron

Trou au Natron (French: "hole of natron") or Doon Orei (Teda: "big hole") is a volcanic caldera of the Tibesti Massif in the nation of Chad in Northern Africa.

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Tuff

Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption.

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Ultra-prominent peak

An ultra-prominent peak, or ultra for short, is a mountain summit with a topographic prominence of or more; it is also called a P1500.

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Volcanic ash

Volcanic ash consists of fragments of rock, mineral crystals, and volcanic glass, produced during volcanic eruptions and measuring less than 2 mm (0.079 inches) in diameter.

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Volcanic cone

Volcanic cones are among the simplest volcanic landforms.

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Volcanic explosivity index

The volcanic explosivity index (VEI) is a relative measure of the explosiveness of volcanic eruptions.

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Volcanic field

A volcanic field or crater row is an area of Earth's crust that is prone to localized volcanic activity.

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Volcano

A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface.

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War in Darfur

The War in Darfur, also nicknamed the Land Cruiser War, was a major armed conflict in the Darfur region of Sudan that began in February 2003 when the Sudan Liberation Movement (SLM) and the Justice and Equality Movement (JEM) rebel groups began fighting against the government of Sudan, which they accused of oppressing Darfur's non-Arab population. Deriba (caldera) and war in Darfur are Darfur.

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