Where in the World? #5

Last week: Mauna Loa, Hawaii. By volume, Mauna Loa is the largest volcano in the world. Various web sites give the volume of its lava flows as anywhere from 40,000 to 75,000 km3. Most of the mountain is below sea level, but if one measures from the base to the summit, there is a total relief of over 9000 meters (29500 feet), making it the tallest mountain in the world when measured from the base to the summit.

I’ll move on from the volcanoes theme, and look at interesting coastlines for the month of October. Here’s an easy one. What country is this feature in, and what is the name of the body of water it is found in?


Grace and Peace

Where in the World? #4

Last week I had an image of Toba, a volcano on the island of Sumatra in Indonesia (winner: Ron Schott from The Geology Home Companion). Toba had a colossal eruption 70-75,000 years ago which was probably the largest on Earth in the past several million years; even larger than the eruptions of the Yellowstone Caldera (last eruption 640,000 years ago). The volume of material from the Toba eruption was approximately 2800 km3, compared to 1.2 km3 from the 1980 eruption of Mt. St. Helens. The Toba event undoubtedly had a worldwide impact on climate and probably led the the extinction of many species in southern Asia.

This week: one more volcano. What volcano is this?

Grace and Peace

Where in the World? #3

Last week’s Google Earth image was Vesuvius, most famous for its 79 AD eruption that buried Pompeii and Herculaneum, near modern-day Naples, Italy. Vesuvius has erupted numerous times throughout history, with the most recent eruption being in 1944. The outer rim on the right side of the photo is from a prehistoric catastrophic eruption that destroyed much of the mountain.

This week, once again, I’m featuring a volcano. This one is a mega-volcano, with the world’s largest volcanic lake. Where is it?


Grace and Peace

Where in the World #2

Last week: Santorini, the site of the 1600 B.C. eruption that helped wipe out the ancient Minoan civilization in the Agean Sea and the island of Crete. Lois and Sheri submitted the correct answer; I would send them a GeoChristian mug or t-shirt as a prize, but there is no such thing.

This week: it’s another Google Earth view of a volcano, somewhere in the world. Note that there is a volcano inside of an older volcano here. The outer ring has more deeply eroded slopes, while the cone built up in the center shows little evidence of stream erosion.


Grace and Peace