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 Published by the American Geological Institute
November 2000
Newsmagazine of the Earth Sciences

Where on Earth?

Do you have slides and photos you've collected from field work or vacations? Every month, we'd like to feature one of your photos from anywhere in the world and invite other readers to guess where it was taken. Look every month in the print Geotimes for a new photo. Following are clues, answers and winners from past issues.

Submit photos for Where on Earth?

The first three readers to identify the location pictured in the current print version of Geotimes receive a Brunton 8099 EclipseTM compass and the first 10 will  receive a Where on Earth? T-shirt. Please note that all contestants are eligible to win one compass per year.

Answers to the October and September  photo contests:

Archive of old answers


1.  An interannual climate phenomenon brought severe floods and landslides to this valley in 1998, claiming many lives and destroying a hydroelectric plant.

2.  Within one 100-mile section of this mountain belt, the vertical distance between its high peaks and the bottom of the subduction trench offshore is as much as 14,000 meters (47,000 feet).

3.  Tucked away in this mountain is an important archeaological site, one of many that dot the entire valley, which terminates at the remains of an ancient city forgotten until discovered by an archeologist in 1911.

Scroll down for the answer  ...

This mountain overlooks the colonial city of Pisac in south-central Peru's Urubamba valley, named for the river flowing through it. Also called the Sacred Valley, it was important to the Inca and houses many Inca ruins, including the ruins of Pisac, nestled behind this mountain, and the well-known city of Machu Picchu, which sits at the valley's northern end.

October winners:

George Dasher Elkview, WV
David King Auburn, Ala.
David Keating
Ryan Christiansen. DeKalb, Ill.
Paul Butler Olympia, Was.
Mauri Pelto Dudley, Mass.
Jim Humphrey Midland, Tex.
Michael Siemens Rolla, Mo.
Jeff Amato LasCruces, N.M.
Seigfried Hamann Huntington Beach, Calif.

September clues & answer:

1.  The cap rock of the hill is a dolerite sill that formed during the breakup of Gondwanaland. The sill intruded sedimentary rocks that form the rest of the hill and surrounding plain. They belong to a lithologic group that contains this country's main source of coal.

2.  In 1879, an indigenous army defeated British troops here in the first major battle of an eight-month war.

3.  On Christmas Day in 1497, Portuguese explorer Vasco de Gama sighted the coast of the province in which this hill is located. This sighting inspired the province's name.

Scroll down for the answer  ...

Isandhlwana Hill in the Kwazulu Natal Province of South Africa. Isandhlwana Hill is a Karoo dolerite (Jurassic age) intrusive into Permian shales/sandstone of the Pietermariztburg and Vryheid Formations, Ecca Group, Karoo Supergroup.

September winners:

John L. Snyder Arlington, Va.
William Smith McLean, Va.
George Dasher Elkview, WV
David T. King, Jr. Auburn, Ala.
David J. Wronkiewicz Rolla, Mo.
William M. Jordan Lancaster, Penn.
Bill Laughlin
Jesse Dann Cambridge, Mass.
Skip Blanchard
Dick Swainbank Alaska