Ohio's bedrock reveals a rich story of the ancient landscapes and animals--foot-long clams, massive meat-eating reptiles, lumbering mammoths--that existed thousands to hundreds of millions of years ago. Fluctuating seas full of marine life, widespread floodplains and rivers chocked with sediment, and mile-thick ice sheets from the north all shaped Ohio's present landscape. But Ohio's geologic tale has a human side too. Native Americans fashioned razor-sharp flint spear points; oil, gas, and coal fueled several economic booms; sandstone and limestone built communities and thriving economies....
Ohio's bedrock reveals a rich story of the ancient landscapes and animals--foot-long clams, massive meat-eating reptiles, lumbering mammoths--that exi...
Minnesota's lakes may be its most famous features, but the glaciated countryside disguises a much longer history of volcanoes and plate collisions--not surprising when you learn that Minnesota was at the active edge of the fledgling North American continent for several billion years.
Minnesota's lakes may be its most famous features, but the glaciated countryside disguises a much longer history of volcanoes and plate collisions--no...
With more than 10,000 geysers, hot springs, fumaroles, and mud pots, as well as cubic mile upon cubic mile of once-incendiary rhyolite, the landscape of Yellowstone Country vividly displays its fiery past and present. The region contains 1/5 of the world's geysers, including the most famous of them all, and is the setting of some of Earth's most destructive volcanic eruptions. The 19 road guides in Roadside Geology of Yellowstone Country fully explore this volcanic pedigree
while also delivering you to sites that have recorded the region's broadand deep geologic story, which includes...
With more than 10,000 geysers, hot springs, fumaroles, and mud pots, as well as cubic mile upon cubic mile of once-incendiary rhyolite, the landscape ...
