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 Published by the American Geological Institute
Newsmagazine of the Earth Sciences

October 2000

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 September and August photo contests:
Archive of old answers

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


August clues & answer:

1.  This cave formed in Mississippian limestones that were themselves formed in an inland sea 300 million years ago. Its pit, the site of large waterfalls during wet weather, drops 142 feet from the surface and is a popular spot for rappelling.

2.  Cherokee used nearby caves as a refuge from the elements. The caves show signs of intermittent human habitation for almost 10,000 years.

3.  The cave is located in the northeast corner of a state that is home to the nation's premier society for the study, exploration and conservation of caves.

Scroll down for the answer  ...

Stevens Gap Cave in the northeastern corner of Alabama, in Jackson County.

August winners:

Bill Torode Huntsville, Ala.
Jim Hall Madison, Ala.
George Dasher Elkview, W.V.
David Williamson Shreveport, La.
Billy Morris Rome, Ga.
James Currens Lexington, Ken.
Bill Balfour Blacksburg, Va.
Ray Yang Temple City, Calif.
Rob McDowell Atlanta, Ga.
Geary Schindel San Antonio, Texas