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"Science" Doesn't Have to be Craptacular

Source: I get so depressed sometimes...We live in the most spectacular of times, and in so many ways humans have accomplished incredible feats, with explorations out to the voids of space and into the micro-world of atoms, quarks, and strings. Show More Summary

Magma pancakes beneath Lake Toba

Where do the tremendous amounts of material that are ejected to from huge volcanic calderas during super-eruptions actually originate?

If These Cliffs Could Talk: Tis-sa-ack and Tu-tok-a-nu-la (A Geologic Love Story)

Tis-sa-ack (Half Dome) from near Yosemite Falls A love story...Unnumbered snows have come and gone since The Great Spirit led a band of his favorite children into the mountains, and bade them rest in this beautiful Valley of Ah-wah-nee. Show More Summary

A Hanging Valley in Lamoille Canyon

Getting back to Lamoille Canyon, a place of stunning cliffs and glacier carved valleys, I'm going to take us to an up-canyon viewpoint where we can see one of many hanging valleys. MOH and I initially came to this valley by way of the last stop on our second-day, GBR field trip. Show More Summary

New study finds oceans arrived early to Earth

Earth is known as the Blue Planet because of its oceans, which cover more than 70 percent of the planet's surface and are home to the world's greatest diversity of life. While water is essential for life on the planet, the answers to two key questions have eluded us: where did Earth's water come from and when?

Rare 2.5-billion-year-old rocks reveal hot spot of sulfur-breathing bacteria

Biogeochemical signals in 2.5-billion-year-old carbonate rocks from Brazil reveal that sulfur-consuming bacteria were active at a time when ocean sulfur levels were low. Geology graduate student Iadviga Zhelezinskaia is the first researcher to focus on sulfur isotopes in ancient carbonate rocks. Show More Summary

If These Cliffs Could Talk: A Sentinel People Sometimes Miss in Yosemite

If you saw this picture out of context, perhaps in the opening frames of an adventure movie, you might think of this cliff as being an otherworldly precipice full of allure and mystery. Maybe dragons perch on its summit, maybe buried treasure lies in a cave at its base. Show More Summary

Online resources for next year's Tucson gem-mineral-fossil showcase

The folks at Visit Tucson provided updates about the next Tucson Gem, Mineral & Fossil Showcase, which runs January 31-February 15, 2015. [photo credit Visit Tucson] Here is the latest news: A new wholesale show will move into the Grand...Show More Summary

New study shows 3 abrupt pulse of CO2 during last deglaciation

A new study shows that the rise of atmospheric carbon dioxide that contributed to the end of the last ice age more than 10,000 years ago did not occur gradually, but was characterized by three 'pulses' in which C02 rose abruptly.

Synthetic biology for space exploration

Synthetic biology may hold the key to long-termed manned explorations of Mars and the Moon. Berkeley Lab researchers show that biomanufacturing based on microbes could to make travel to and settlement of extraterrestrial locations more practical and bearable.

To Explore a Wild Cave: The Underground Wilderness of the Sierra Nevada

There is a treasure in the Mother Lode of California's Sierra Nevada. It lies hidden beneath the surface, but it's not gold. It is a wilderness, but has no beautiful trees or distant vistas. It is dark and sometimes can be a bit creepy, but it is a place of incredible beauty as well. Show More Summary

The Wild Oakland walk on the Hayward fault

Saturday I led a walk for the members and friends of Wild Oakland to show off one of Oakland’s most striking places to encounter the Hayward fault. There was a nice turnout, about 60 people. I was glad to see so much interest. I hope that this post will enable those people, as well as […]

Report on Duncan earthquake aftershocks

The first report on the magnitude 5.3 Duncan earthquake is posted on the Arizona Geology online magazine page at report author, Dr. Show More Summary

Offshore islands amplify, rather than dissipate, a tsunami's power

Study: Coastal islands do not dissipate a tsunami's power, as previously believed.

A Different Canada Goose, the Cackling Kind: Evolution on the Continent

Isolation brings about evolutionary change, and the Canada Goose clan has been doing some changing over the last few thousand years, especially in Hawaii, but also here in California. Today's blog is cross-posted from my new birding blog, Geotripper's California Birds. Show More Summary

Life in Earth's primordial sea was starved for sulfate

The findings paint a new portrait of our planet's early biosphere and primitive marine life. Organisms require sulfur as a nutrient, and it plays a central role in regulating atmospheric chemistry and global climate.

What happens when a Canadian Goose goes on a tropical vacation?

Can you imagine a four foot long goose? That's what happens when a Canadian Goose decides to take a tropical vacation and chooses to stick around.I've been developing another blog over the last few months as an outlet for my new hobby, bird photography (Geotripper's California Birds). Show More Summary

If These Cliffs Could Talk: The Cathedral Rocks vs.the Cathedral Spires

Cathedral Rocks and Bridalveil Fall from the Gateway View (April 2014) Yosemite Valley has such a richness of sheer and spectacular cliffs that I imagine any one of them would rate being a national park or monument of its own in any other setting. Show More Summary

Construction update at US89 landslide

Heavy construction has been underway since this summer on building a giant buttress below the landslide that closed US highway 89 southwest of Page. ADOT has a webpage with updates on the work, but also posts updates on their blog with the latest on September 3. Show More Summary

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