Horizon Guyot is an underwater volcanic mountain with a flat top in the Mid-Pacific Mountains west of Hawaii and northeast of the Line Islands. An elongated ridge over 300 kilometres (190 mi) long and 4.3 kilometres (2.7 mi) high, it stretches in a northeast–southwest direction, rising to a depth of 1,443 metres (4,734 ft). It was probably formed by a hotspot, but evidence is conflicting. Its volcanic activity occurred between 100.5 and 82 million years ago during the Cretaceous Period. Around 89 million years ago, carbonate deposition from lagoonal and reefal environments set in and formed limestone. Volcanic islands developed on Horizon Guyot as well and were colonised by plants. Pelagic ooze has accumulated on the seamount, forming a thick layer that has been further modified by ocean currents, landslides, and various organisms living on it. Ferromanganese crusts have been deposited on exposed rocks.
Read more: <https://en.wikipedia.org/wiki/Horizon_Guyot> _______________________________ Today's selected anniversaries: 1874: The Universal Postal Union, then known as the "General Postal Union", was established with the signing of the Treaty of Bern to unify disparate postal services and regulations so that international mail could be exchanged freely. <https://en.wikipedia.org/wiki/Universal_Postal_Union> 1913: Carrying a cargo hold full of highly flammable chemicals, the ocean liner SS Volturno caught fire in the north Atlantic and sank, resulting in 136 deaths. <https://en.wikipedia.org/wiki/SS_Volturno_%281906%29> 1986: The Phantom of the Opera (scene pictured), a musical by Andrew Lloyd Webber and currently the longest-running Broadway show in history, opened in London's West End. <https://en.wikipedia.org/wiki/The_Phantom_of_the_Opera_%281986_musical%29> 2012: Pakistani activist Malala Yousafzai was severely injured by a Taliban gunman in a failed assassination attempt. <https://en.wikipedia.org/wiki/Malala_Yousafzai> _____________________________ Wiktionary's word of the day: style: 1. (transitive) To call or give a name or title to. 2. (transitive) To create for, or give to, someone a style, fashion, or image, particularly one which is regarded as attractive, tasteful, or trendy. 3. (intransitive, US, informal) To act in a way which seeks to show that one possesses style. <https://en.wiktionary.org/wiki/style> ___________________________ Wikiquote quote of the day: From everything that man erects and builds in his urge for living nothing is in my eyes better and more valuable than bridges. They are more important than houses, more sacred than shrines. Belonging to everyone and being equal to everyone, useful, always built with a sense, on the spot where most human needs are crossing, they are more durable than other buildings and they do not serve for anything secret or bad. --Ivo Andrić <https://en.wikiquote.org/wiki/Ivo_Andri%C4%87> _______________________________________________ Wikipedia Daily Article mailing list. To unsubscribe, visit: https://lists.wikimedia.org/mailman/listinfo/daily-article-l Questions or comments? Contact [email protected]
