Boulder vs Bahía Blanca

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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

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Bahía Blanca (Spanish pronunciation: [baˈi.a ˈβlaŋka]; English: White Bay) is a city in the southwest of the province of Buenos Aires, Argentina, by the Atlantic Ocean, and is the seat of government of Bahía Blanca Partido. It had 301,572 inhabitants according to the 2010 census [INDEC]. It is the principal city in the Greater Bahía Blanca urban agglomeration. The city has an important sea port with a depth of 45 feet (15 m), kept constant upstream almost all along the length of the bay, where the Napostá Stream drains.

Bahía Blanca means "White Bay". The name is due to the typical colour of the salt covering the soil surrounding the shores. The bay (which is actually an estuary) was seen by Ferdinand Magellan during his first circumnavigation of the world on the orders of Charles I of Spain, in 1520, looking for a canal connecting the Atlantic to the Pacific Ocean along the coasts of South America.

Source: Wikipedia