Archive for the ‘Craters’ Category

Ngorongoro Crater, World’s Largest Unbroken Caldera

February 15th, 2009 by admin | No Comments | Filed in Craters, Volcano

Called the eighth wonder of the world, Ngorongoro Crater is the world”s largest unbroken and unflooded volcanic caldera in the Eastern (Great) Rift Valley, northern Tanzania, Africa. It lies 75 miles west of the town of Arusha. The crater measures between 10 and 12 miles across and has an area of 102 square miles. It”s rim is heavily forested and rises 2,000 feet above the caldera’s floor to an elevation of 7,500 feet. It is included within a UNESCO World Heritage site designated in 1979.

Ngorongoro Crater panorama

Panoramic view of the Ngorongoro Crater (Source)

When it was active some 2.5 million years ago, Ngorongoro volcano was one of the world”s tallest mountains. After a major eruption, it”s volcanic cone collapsed inward leaving the present vast, unbroken caldera as its chief remnant and a flat plain area.

Ngorongoro Crater Map

Ngorongoro Crater Map (Source)

The Ngorongoro Crater floor is predominantly open grassland and is haven to a diverse array of animals including elephants, black rhinoceroses, leopards, buffalo, zebras, warthogs, wildebeests, Grant’s and Thomson’s gazelles, and the densest population of lions in the world.

female lion on a hunt for zebra at ngorongoroFemale lion on a hunt for zebra

Lake Magadi, a shallow soda lake ringed by extinct volcanoes, is renowned as a habitat for great flocks of pink flamingos.

pink flamingo ngorongoro

Panoramic view of the Ngorongoro Crater (Source)

The local Masai people also graze their livestock in the crater. Some villagers don”t like to be taken pictures, others ask money from tourist in exchange of pictures.

Masai family in Ngorongoro

Masai family in Ngorongoro (Source)

When a lodge was built on its rim in the 1930s, large numbers of tourists began visiting the caldera. Since the region’s incorporation into the Ngorongoro Conservation Area in 1959, additional lodges have been built.

Tourists taking pictures from Ngorongoro Wildlife Lodge

Tourists taking pictures from Ngorongoro Wildlife Lodge(Source)

Barringer Meteor Crater, Squarish-shaped Meteor Impact Crater

August 26th, 2008 by admin | No Comments | Filed in Craters

Barringer Meteor Crater is a 4,145 feet across, and 570 feet deep meteor crater. This squarish shape impact crater is is located in Arizona, USA. In 1871, it was though as a clasped top of volcano but in 1902 Dr. Daniel Barringer proved that the rocks around the hole were not volcanic and showed a couple of signs that mean it was crushed by an enormous body going at the speed of 43,125 mph. The explosion of the impact produced a massive explosion equivalent to at least 2.5 megatons of TNT or about 150 times the yield of the atomic bombs used at Hiroshima and Nagasaki.

The 300,000 tonne nickel-iron meteorite, about 50 meters accross, was smashed into pieces instantly and was scattered around the crater plain over an area 8 to 10 miles in diameter.

Barringer Meteor Crater

Source: http://www.flickr.com/photos/walterarce/

Looking into the crater from the north rim. The rust colored area on the far (south) rim is where the last mining for the meteorite occurred in 1929 and is believed to be the site of the bulk of the meteorite.

Source: flickr.com/photos/hummingcrow

The meteor crater is large enough to be seen from outer space.

Source: wikipedia.org