Bøger af Erik Hanson

Canyons, Revised Edition chronicles the origins, history, and structure of the world's most breathtaking gorges, from North America's spectacular Grand Canyon to western Australia's exciting Windjana Gorge, where the Leonard River snakes its way through an ancient barrier reef. This eBook also discusses tectonic activity, undersea canyons, liquid rock, and pinpoints recent scientific studies and modern-day ecological challenges.

A captivating introduction to the world's most fascinating caves, Caves, Revised Edition explores every nook and cranny of these nature-made creations--including lava caves, sea caves, and glacial caves--from Kentucky's Mammoth Cave, to the amazing Paleolithic paintings of Lascaux, to Fingal's Cave of Scotland, which inspired Mendelssohn's Hebrides Overture. Engrossing facts about the geologic origins of these underground voids; their astonishing speleothems, or formations, such as stalactites and stalagmites; and the microscopic extremophile organisms that dwell within are enhanced by exciting photographs and a wealth of other educational resources for further exploration.

Both a scientific tour and a journey through time, this intriguing, eBook profiles 10 of the world's most exciting lakes. From the Caspian Sea, a giant salt water lake; to Lake Eyre, the lake that vanishes; to the sub-Arctic Great Slave Lake, the story of each lake unfolds with a look at its origins, how it has changed over time, and why. Featured lakes are found in the Middle East, the United States, Russia, South America, Europe, Australia, and Canada. Eye-catching images and illustrations complement the lively text.

Chronicles the origins, history, and structure of the world's most famous gorges, from North America's Grand Canyon to western Australia's Windjana Gorge. This book also discusses tectonic activity, undersea canyons, liquid rock, and pinpoints scientific studies and modern-day ecological challenges.