Rock of Gibraltar—Catastrophic Floods

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Yellowstone’s Cataclysmic Origins and Future
Read the evidence in the rocks to discover Yellowstone's bigger story: the massive volcanic eruptions that created the region and will one day destroy it, the glaciers that shaped the terrain, and the meltwater floods that carved the impressive Grand Canyon of Yellowstone.
Santorini—Impact of Volcanic Eruptions
Learn Professor Wysession's criteria for choosing more than 200 different geologic wonders in nearly 120 countries. Then explore the first on his list: the beautiful Greek island of Santorini, which is the relic of a volcanic eruption that had a profound effect on the ancient Mediterranean world.
Uluru/Ayers Rock—Sacred Nature of Rocks
Go to Uluru-Kata Tjuta National Park in Australia to inspect two popular attractions shaped by erosion: Ayres Rock, known locally as Uluru, and the Kata Tjuta rock domes. Trace the history of moving plates, rising and receding seas, and constant weathering that created these impressive structures.
The Dead Sea—Sinking and Salinity
Begin a series of episodes on desert regions by exploring the Dead Sea. Learn why this body of water on the border between Israel and Jordan is almost nine times saltier than the ocean and has the lowest elevation of any place on Earth.
The Amazon Basin—Lungs of the Planet
The Amazon River collects rainfall from a huge region, called the Amazon basin. Trace the basin's extensive network of tributaries, which produce 20% of the fresh water that flows into the ocean. Furthermore, the basin's lush vegetation is responsible for 20% of all oxygen in the atmosphere.
African Rift Valley—Cracks into the Earth
Visit the African Rift Valley, a mid-ocean ridge in the making. From the Red Sea to Mount Kilimanjaro, tectonic forces are splitting Africa apart, forming a new ocean in the process. This impressive valley is also the site of many fossil discoveries relating to early humans.
The Maldives—Geologic Paradox
Home to some of the world's most beautiful beaches, the Maldives in the Indian Ocean show the tranquil end-stage of ocean islands built on hotspots. The volcanoes beneath this coral reef archipelago are long since dormant, and the islands themselves barely rise above sea level.
Columbia Glacier—Unusual Glacier Cycles
Witness the power of glaciers, which carry a continuous stream of ice and rock from the tops of mountain ranges down to the base--often to the sea, such as at Columbia Glacier in Alaska. Chart the rapid retreat of Columbia Glacier since 1980, which has been triggered by climate change.
The World’s Greatest Geological Wonders - 36 Spectacular Sites Collection
Geological wonders are like great works of art. They are impressive, beautiful, mysterious, and surprising. Whether you are planning your next vacation or exploring the world from home, this course is your gateway to an unrivaled adventure. By the time you complete this course, you will have experienced more than…
Erta Ale—Compact Fury of Lava Lakes
Zoom in on a remarkable feature of the African Rift Valley: the lava lake at Erta Ale in Ethiopia. This seething cauldron of molten rock is the oldest of the world's five active lava lakes, and it replicates on a small scale the complex process of plate tectonics.
The Grand Canyon’s 2-Billion-Year Staircase
Descend into the Grand Canyon, recording the full sequence of strata from top to bottom--a story that takes you from 270-million-year-old limestone formed in a shallow sea to basement rocks that record a mountain-building saga from 1.7 billion years ago.
Acadia’s Highlands and Islands
The rocks of coastal Maine reveal a gripping legacy of lost oceans, colliding continents, epic mountains, furious volcanoes, and massive glaciers. Acadia National Park records evidence of all this, etched into its granite summits and boulder-strewn shores.