Saturday, May 21, 2016, 4:00 pm - 6:00 pm
575 Osgood Street
North Andover, MA
Lecture 23: Bay of Fundy – Inexorable Cycle of Tides
In the last lecture, we visited the Rock of Gibraltar, with its unusual history of ocean currents and catastrophic floods. In this lecture, we’ll visit a place where the sea level can rise or fall an enormous amount in a matter of hours; the Bay of Fundy in eastern Canada. This area is stark and largely low-lying; it is peaceful and undeveloped but renowned for having the largest ocean tides anywhere in the world. At the Bay of Fundy, the water can rise and fall more than 50 feet two times a day.
Lecture 24: Hawaii – Volcanic Island Beauty
We’ve already looked at a spectacular volcano at a subduction zone, Mount Fuji, and the bizarre volcanic environment at the Galapagos Rift, but in any discussion of volcanoes, nowhere else on Earth compares to Hawaii. The Big Island of Hawaii is not only the biggest volcano on Earth, but it’s the biggest mountain of any kind on the planet. The highest point on the Big Island, Mauna Kea, is 13,796 feet above sea level. However, Hawaii actually rises a significant distance from the base of the seafloor, which makes it about 33,500 feet, or more than 6.3 miles tall, and it’s about 100 kilometers across.
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