Boulder | |
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State | Utah |
Country | United States of America |
Capital | |
Population | 0 |
Postcode | 84716 |
In geology, a boulder is a rock fragment with size greater than 256 millimetres (10.1 in) in diameter. Smaller pieces are called cobbles and pebbles. While a boulder may be small enough to move or roll manually, others are extremely massive.
In common usage, a boulder is too large for a person to move. Smaller boulders are usually just called rocks (American English) or stones (In British English a rock is larger than a boulder). The word boulder is short for boulder stone, from Middle English bulderston or Swedish bullersten.In places covered by ice sheets during Ice Ages, such as Scandinavia, northern North America, and Siberia, glacial erratics are common. Erratics are boulders picked up by ice sheets during their advance, and deposited when they melt.
Tallinn | |
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State | |
Country | |
Capital | |
Population | 443623 |
Tallinn (; Estonian: [ˈtɑlʲˑinˑ]; names in other languages) is the capital, primate and the most populous city of Estonia. Located in the northern part of the country, on the shore of the Gulf of Finland of the Baltic Sea, it has a population of 437,619 in 2020. Administratively a part of Harju County, Tallinn is the main financial, industrial and cultural centre of Estonia; the second largest city, Tartu, is located in the southern part of Estonia, 187.2 kilometres (116.3 mi) southeast of Tallinn. Tallinn is located 80.32 kilometres (49.91 mi) south of Helsinki, Finland, 320.56 kilometres (199.19 mi) west of Saint Petersburg, Russia, 300.84 kilometres (186.93 mi) north of Riga, Latvia, and 380 kilometres (240 mi) east of Stockholm, Sweden. It has close historical ties with these four cities. From the 13th century until the first half of the 20th century Tallinn was known in most of the world by its historical German name Reval.
Tallinn, first mentioned in 1219, received city rights in 1248, but the earliest human settlements date back 5,000 years.
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