Mons vs Boulder

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Mons (French pronunciation: ​[mɔ̃s]; Dutch: Bergen; German: Bergen; Picard: Mont; Walloon: Mont) is a Belgian city and municipality, and the capital of the province of Hainaut in the Walloon region. Mons was made into a fortified city by Count Baldwin IV of Hainaut in the 12th century. The population grew quickly, trade flourished, and several commercial buildings were erected near the Grand’Place. In 1814, King William I of the Netherlands increased the fortifications, following the fall of the First French Empire. The Industrial Revolution and coal mining made Mons a center of heavy industry. In 1830, Belgium gained its independence and the decision was made to dismantle the fortifications, allowing the creation of large boulevards and other urban projects.

On 23–24 August 1914, Mons was the location of the Battle of Mons. The British were forced to retreat and the town remained occupied by the Germans until its liberation by the Canadian Corps during the final days of the war. There are several memorial placards related to the WW1 battles. Today, the city is an important university town and commercial centre. The main square is the centre of the old city. It is paved in the manner of old cities and is home to many cafes and restaurants, as well as the town hall and belfry. It is forbidden to park in or drive through the centre. Together with the Czech city of Plzeň, Mons was the European Capital of Culture in 2015.

Source: Wikipedia

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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.

They are called "erratic" because they typically are of a different rock type than the bedrock on which they are deposited. One of them is used as the pedestal of the Bronze Horseman in Saint Petersburg, Russia. Some noted rock formations involve giant boulders exposed by erosion, such as the Devil's Marbles in Australia's Northern Territory, the Horeke basalts in New Zealand, where an entire valley contains only boulders, and The Baths on the island of Virgin Gorda in the British Virgin Islands. Boulder-sized clasts are found in some sedimentary rocks, such as coarse conglomerate and boulder clay. The climbing of large boulders is called bouldering.

Source: Wikipedia