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The Mount Cayley volcanic field is a north–south trending volcanic zone on the coast of British Columbia that stretches 31 km (19 mi) from the Pemberton Icefield to the Squamish River. The field is located in the Sea-to-Sky Corridor of southwestern British Columbia, Canada. It forms the central segment of the Garibaldi Volcanic Belt, the Canadian portion of the Cascade Volcanic Arc, which extends from Northern California. Most of the Cayley volcanoes were formed during periods of volcanism under sheets of glacial ice throughout the last glacial period. These subglacial eruptions formed steep, flat-topped volcanoes and subglacial lava domes, most of which have been entirely exposed by deglaciation. The field gets its name from Mount Cayley, the largest and most persistent volcano, located at the southern end of the Powder Mountain Icefield. This icefield covers much of the central portion of the volcanic field and is one of the several glacial fields in the Pacific Ranges of the Coast Mountains. Eruptions along the length of the field began between 1.6 and 5.3 million years ago. At least 23 eruptions have occurred throughout its eruptive history. This volcanic activity ranged from effusive to explosive, with magma compositions ranging from basaltic to rhyolitic. (more...)

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February 27: Independence Day in the Dominican Republic (1844)

• 1560 – The Treaty of Berwick was signed, which set the terms under which an English fleet and army could come to Scotland to expel the French troops who were defending the Regency of Mary of Guise.
• 1812 – Manuel Belgrano (pictured) raised the Flag of Argentina, which he designed, for the first time in the city of Rosario, during the Argentine War of Independence.
• 1962 – Two dissident Republic of Vietnam Air Force pilots bombed the Independence Palace in Saigon in a failed assassination attempt of President of South Vietnam Ngo Dinh Diem.
• 1982 – The D'Oyly Carte Opera Company, known for its performances of Gilbert and Sullivan's Savoy operas, gave its last performance.
• 1989 – A wave of protests, riots and looting known as the Caracazo resulted in a death toll of anywhere between 275 and 3000 people in the Venezuelan capital Caracas and its surrounding towns.

More anniversaries: February 26 – February 27 – February 28