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Flint
Flint is a hard, sedimentary cryptocrystalline form of the mineral quartz, categorized as a variety of chert. It occurs chiefly as nodules and masses in sedimentary rocks, such as chalks and limestones. Inside the nodule, flint is usually dark grey, black, green, white or brown in colour, and often has a glassy or waxy appearance. A thin layer on the outside of the nodules is usually different in colour, typically white and rough in texture. From a petrological point of view, "flint" refers specifically to the form of chert which occurs in chalk or marly limestone [...More Info...] [...Related Items...] |
Danube
The Danube or Donau (/ˈdænjuːb/ DAN-yoob, known by various names in other languages) is Europe's second longest river, after the Volga. It is located in Central and Eastern Europe. The Danube was once a long-standing frontier of the Roman Empire, and today flows through 10 countries, more than any other river in the world. Originating in Germany, the Danube flows southeast for 2,860 km (1,780 mi), passing through or touching the border of Austria, Slovakia, Hungary, Croatia, Serbia, Romania, Bulgaria, Moldova and Ukraine before emptying into the Black Sea. Its drainage basin extends into nine more countries. The Danube river basin is the most biodiverse region in Europe, and is home to hundreds of fish species, such as pike, zander, huchen, wels catfish, burbot and tench. It is also home to a large diversity of carp and sturgeon, as well as salmon and trout [...More Info...] [...Related Items...] |
Petrology
Petrology (from the Greek πέτρος, pétros, "rock" and λόγος, lógos, "subject matter", see -logy) is the branch of geology that studies rocks and the conditions under which they form. Petrology has three subdivisions: igneous, metamorphic, and sedimentary petrology. Igneous and metamorphic petrology are commonly taught together because they both contain heavy use of chemistry, chemical methods, and phase diagrams [...More Info...] [...Related Items...] |
Jutland
Jutland (/ˈdʒʌtlənd/; Danish: Jylland [ˈjylanˀ]; German: Jütland [ˈjyːtlant]), also known as the Cimbric or Cimbrian Peninsula (Latin: Cimbricus Chersonesus; Danish: Den Kimbriske Halvø; German: Kimbrische Halbinsel), is a peninsula of Northern Europe that forms the continental portion of Denmark and part of northern Germany. The names are derived from the Jutes and the Cimbri, respectively [...More Info...] [...Related Items...] |
Paris Basin
The Paris Basin is one of the major geological regions of France having developed since the Triassic on a basement formed by the Variscan orogeny [...More Info...] [...Related Items...] |
English Channel
The English Channel (French: la Manche, "The Sleeve"; German: Ärmelkanal, "Sleeve Channel"; Breton: Mor Breizh, "Sea of Brittany"; Cornish: Mor Bretannek, "British Sea"), also called simply the Channel, is the body of water that separates southern England from northern France, and links the southern part of the North Sea to the Atlantic Ocean [...More Info...] [...Related Items...] |
Kraków
Kraków (Polish: [ˈkrakuf] (  listen)), also Cracow or Krakow (UK: /ˈkrækaʊ/; US: /ˈkrɑː-/), is the second largest and one of the oldest cities in Poland. Situated on the Vistula River (Polish: Wisła) in the Lesser Poland (Polish: Małopolska) region, the city dates back to the 7th century. Kraków has traditionally been one of the leading centres of Polish academic, cultural, and artistic life and is one of Poland's most important economic hubs. It was the capital of the Crown of the Kingdom of Poland from 1038 to 1569; the Polish–Lithuanian Commonwealth from 1569 to 1596, the Free City of Kraków from 1815 to 1846; the Grand Duchy of Cracow from 1846 to 1918; and Kraków Voivodeship from the 14th century to 1998
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Cretaceous
The Cretaceous ( /krɪˈteɪʃəs/, kri-TAY-shəs) is a geologic period and system that spans from the end of the Jurassic Period 145 million years ago (mya) to the beginning of the Paleogene Period 66 mya. It is the last period of the Mesozoic Era, and the longest period of the Phanerozoic Eon. The Cretaceous Period is usually abbreviated K, for its German translation Kreide (chalk, creta in Latin). The Cretaceous was a period with a relatively warm climate, resulting in high eustatic sea levels that created numerous shallow inland seas. These oceans and seas were populated with now-extinct marine reptiles, ammonites and rudists, while dinosaurs continued to dominate on land [...More Info...] [...Related Items...] |
Jurassic
The Jurassic period (/dʒʊəˈræs.ɪk/; from Jura Mountains) is a geologic period and system that spanned 56 million years from the end of the Triassic Period 201.3 million years ago (Mya) to the beginning of the Cretaceous Period 145 Mya. The Jurassic constitutes the middle period of the Mesozoic Era, also known as the Age of Reptiles. The start of the period was marked by the major Triassic–Jurassic extinction event. Two other extinction events occurred during the period: the Pliensbachian-Toarcian extinction in the Early Jurassic, and the Tithonian event at the end; neither event ranks among the "Big Five" mass extinctions, however. The Jurassic period is divided into three epochs: Early, Middle, and Late [...More Info...] [...Related Items...] |
Lägern
The Lägern (also spelled Lägeren; 866 m) is a wooded mountain of the Jura Mountains, stretching from Baden to Dielsdorf, about 15 km north-west of Zurich. The culminating point is located 1 km west of Hochwacht within the canton of Zurich, the border with the canton of Aargau running on a slightly lower summit named Burghorn (859 m). The Lägern lies in the easternmost part of the Jura Mountains, east of the river Aare. It is the highest summit of the range lying between the Rhine, Aare and Limmat. Its location east of the Aare makes it topographically connected to the Appenzell Alps, by the chain of hills running north of Lake Zurich. The mountain is entirely traversed by a trail following the crest from Baden to Dielsdorf [...More Info...] [...Related Items...] |
Amber
Amber is fossilized tree resin, which has been appreciated for its color and natural beauty since Neolithic times. Much valued from antiquity to the present as a gemstone, amber is made into a variety of decorative objects. Amber is used in jewelry. It has also been used as a healing agent in folk medicine. There are five classes of amber, defined on the basis of their chemical constituents [...More Info...] [...Related Items...] |
Spicules Of Silicious Sponges
Spicules are structural elements found in most sponges. They provide structural support and deter predators [...More Info...] [...Related Items...] |
Silicification
In geology, petrifaction or petrification is the process by which organic material becomes a fossil through the replacement of the original material and the filling of the original pore spaces with minerals. Petrified wood typifies this process, but all organisms, from bacteria to vertebrates, can become petrified (although harder, more durable matter such as bone, beaks, and shells survive the process better than softer remains such as muscle tissue, feathers, or skin). Petrifaction takes place through a combination of two similar processes: permineralization and replacement [...More Info...] [...Related Items...] |
Molluscs
Mollusca is a large phylum of invertebrate animals whose members are known as molluscs or mollusks (/ˈmɒləsk/). Around 85,000 extant species of molluscs are recognized. The number of fossil species is estimated between 60,000 and 100,000 additional species. Molluscs are the largest marine phylum, comprising about 23% of all the named marine organisms. Numerous molluscs also live in freshwater and terrestrial habitats. They are highly diverse, not just in size and in anatomical structure, but also in behaviour and in habitat. The phylum is typically divided into 9 or 10 taxonomic classes, of which two are entirely extinct. Cephalopod molluscs, such as squid, cuttlefish and octopus, are among the most neurologically advanced of all invertebrates—and either the giant squid or the colossal squid is the largest known invertebrate species [...More Info...] [...Related Items...] |
Crustaceans
Thylacocephala? † Branchiopoda Remipedia Cephalocarida Maxillopoda
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Dobruja
Dobruja or Dobrudja (Bulgarian: Добруджа, transliterated: Dobrudzha or Dobrudža; Romanian: Dobrogea pronounced [ˈdobrod͡ʒe̯a] ( listen) or [doˈbrod͡ʒe̯a]; Turkish: Dobruca) is a historical region in Eastern Europe that has been divided since the 19th century between the territories of Bulgaria and Romania. It is situated between the lower Danube River and the Black Sea, and includes the Danube Delta, Romanian coast, and the northernmost part of the Bulgarian coast. The territory of Dobruja is made up of Northern Dobruja, which is part of Romania, and Southern Dobruja, which belongs to Bulgaria.
The territory of the Romanian region Dobrogea is organised as the counties of Constanța and Tulcea, with a combined area of 15,500 km2---> (6,011 sq. miles) and a population of slightly less than 900 thousand. Its main cities are Constanța, Tulcea, Medgidia and Mangalia
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