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Geysers in the Americas

Geysers, with hot water and steam welling up from deep underground, are mysterious clues to what lies beneath. Yellowstone National Park includes about half of all geysers found on Earth. The Andes Mountains contain a major geyser field, named El Tatio, in northern Chile......I recently dug around for more information about geysers – and I found some that was new news to me and, I think, quite interesting.

By |2020-10-17T06:08:39-07:00October 15th, 2020|Our Amazing Earth|4 Comments

Yellowstone’s Dynamic Geologic History

The dramatic landscape of Yellowstone National Park, including exploding geysers, bubbling mud volcanoes, and rainbow-colored lakes, all provide hints of the dynamic geologic history of the region. Yellowstone is one of the Earth’s largest volcanic systems, and earthquakes, ground surface movements, and hydrothermal activity in the region are all indications of this volcanism.

By |2020-10-11T06:31:01-07:00October 8th, 2020|Our Amazing Earth|0 Comments

Marvelous Maize

Maize (aka corn) was considered a sacred plant by the Inca, Tiwanaku, Moche and many other ancient Andean cultures. In the Andes Mountains, for millennia the principal use of this plant has been to make an alcoholic beverage called chicha. This beverage was so important to the social and economic functioning of ancient Andean societies that when there was a major disruption in the flow of maize, it helped to trigger the collapse of at least one society that had flourished for hundreds of years.

By |2020-10-01T06:34:59-07:00October 1st, 2020|Ancient Andean Cultures|4 Comments

Machu Picchu’s Unique Geology

Machu Picchu, the Inca citadel high on a ridge in the Andes Mountains, is one of the most impressive and widely recognized archaeological sites on Earth. Since I am fascinated by this spectacular place, I’ve written about it in several blog posts. In a new article I’ve focused on the geology – and this is posted on a website called "GondwanaTalks".

By |2020-09-23T19:37:28-07:00September 23rd, 2020|Ancient Andean Cultures|0 Comments

Nevada Tufa, Tuff, and Scarps

Nevada encompasses an enormous variety of rock, mineral, and geomorphic features. Many aspects of this geology can be seen along Highway 50, which extends from west to east .... and is also known as “The Loneliest Road in America” (doubling its appeal, IMO!). On a recent trip while camping at remote sites (social distancing!), I explored along a western section of this highway....

By |2020-09-17T16:12:46-07:00September 17th, 2020|Our Amazing Earth|6 Comments

Ancient Andean Ritual Drugs – and Beyond

The Inca, Tiwanaku, Moche, Chavín, and many other indigenous Andean cultures used a variety of plant-based drugs – including hallucinogens and narcotics -- in their religious rituals. When the ancient people ingested what they considered to be sacred plants, access to a separate realm – a supernatural world – could be reliably achieved.

By |2020-09-08T07:02:21-07:00September 10th, 2020|Ancient Andean Cultures|2 Comments

Earthquakes and Eruptions in Eastern California

A huge volcano erupted violently about 760,000 years ago on the eastern side of the Sierra Nevada, forming a large depression called the Long Valley Caldera. This “super-eruption” was estimated to be more than 2,000 times larger than the 1980 eruption of Mt St Helens...Today, the Mammoth Lakes resort area is on the western edge of the ancient caldera.

By |2020-08-28T08:07:41-07:00August 27th, 2020|Our Amazing Earth|6 Comments

Monuments, Megaliths, and Inca Builders

In the Andes Mountains of South America, the Incas and their ancestors invested enormous amounts of time and labor in the meticulous work of quarrying, transporting, and fitting together multi-ton stone blocks, or megaliths, for monumental construction projects..... The ancient Andean stonework is so impressive that many have found it difficult to believe that mere humans, who lacked draft animals and were using only stone-age tools, could be responsible for the construction.

By |2020-08-06T11:17:06-07:00August 6th, 2020|Ancient Andean Cultures|6 Comments
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