CompuServe Messages

Kamron (Excuse my newbie naivete–don't know what PMFJI means!) Your description of the igneous dike in Mexico sounds interesting. I've never seen anything like that. Something you Americans probably don't see too much of is glacial landforms, which can be pretty wild when seen from the air over much of Canada. In my various flights over western Canada (including the arctic), I've seen textbook examples of such landforms as drumlins, eskers, huge abandoned meltwater channels, and fields of stabilized barchan (ie small, crescent-shaped) sand dunes. One of the weirdest sights is fields of "prairie mounds" which are small (maybe 20-30 feet in diameter) donut-shaped mounds supposedly caused by melting blocks of ice in the glacial gravel deposits. The delta of the Mackenzie River, near Tuktoyaktuk, Northwest Territories, is a classic locality for pingos, huge blisters of permafrost swelling up on the surface of the tundra. As well, I was amazed to see enormous areas of the Northwest Territories (more than an hour's worth of flying time in a 737, as far as the eye can see) covered in glacial-lineation features, such as elongated lakes and ponds and till ridges, all oriented in the direction of ice-flow from the last ice-age. Howard