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Posts treating: "earth"

Thursday, 28 August 2014

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One of Geology's Little Mysteries Solved: The Sliding Stones of Racetrack Playa in Death Valley 

Geotripper [2014-08-28 09:33:00]  recommend  recommend this post  (42 visits) info

 TR,US
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Bonnie Claire Playa in Nevada There are side shows that happen in the sciences. There are the big mysteries of the cosmos and earth history that take many years and the work of dozens or hundreds of the greatest minds to solve: atomic theory, quantum physics, plate tectonics, DNA sequencing and so on. In geology, there are the big picture mysteries of how the continents have moved through

Asteroids named after two ASU professors 

Arizona Geology [2014-08-25 03:51:00]  recommend  recommend this post  (29 visits) info

 IN
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Asteroids have been named after two ASU professors, Phil Christensen and Dave Williams. The two planetary geologists, both faculty members in ASU’s School of Earth and Space Exploration. Nikki Cassis at ASU reports that Asteroid (10461) Dawilliams was discovered on December 6, 1978, by E. Bowell and A. Warnock at Palomar Observatory. It orbits about 2.42 astronomical units from the Earth

Geology Sonnet 4 

Lounge of the Lab Lemming [2014-08-21 23:24:00]  recommend  recommend this post  (33 visits) info
Enough with carbon, climate variation Let’s look at rocks from a far older time, Which lacked much copper min’ralization, And when anorthosites were at their prime. Earth’s middle age- boring for a reason? Tectonics were remarkably unchanged. Ice and iron were both out of season. A billion years of uniform exchange Of isotopes, strontium, and S The active margins ringed the

Educator How-to: Tectonic Chocolate Bars 

BEYONDbones [2014-08-20 02:06:20]  recommend  recommend this post  (36 visits) info
The earth is vast and its surface seems huge. However, the earth’s crust only makes up 1% of the earth’s mass — subsequent layers (the mantle and the core) make up the other 99%. So, why do we care about the earth’s crust … Continue reading

Seismic Stomp 

State of the Planet [2014-08-12 15:27:09]  recommend  recommend this post  (34 visits) info

 TZ,MW
Lamont-Doherty Earth Observatory graduate student Natalie Accardo recently returned from Tanzania and Malawi, where she installed seismic instruments in both countries alongside Lamont seismologists Donna Shillington and Jim Gaherty. Natalie produced this video, which shows the scientists and their Tanzanian colleagues conducting a “stomp test” at one of their sites in the Tanzanian village of

Having Fun With the SUPERMOON.... 

Geotripper [2014-08-11 07:54:00]  recommend  recommend this post  (40 visits) info
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So let's face it. SUPERMOON really is overblown. Yes, the moon is closer to Earth, but it does this five times this year. Being closer, it is 14% larger in size, and 30% in brightness than when it is farther away. So, nothing unusual, really. But "they" bandy the name about and people pay more attention. Which isn't a bad thing, if it gets people outside and looking upon the cosmos. It is

Saturday's Mystery Photo Revealed: They're Mima Mounds! 

Geotripper [2014-08-03 07:59:00]  recommend  recommend this post  (91 visits) info
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Scale is everything. This morning's mystery photo could have been on another planet, a satellite image of somewhere on Earth, a few inches across, or microscopic. Without scale, we can imagine just about anything because symmetry exists at all levels. I've seen dinosaur skin impressions that looked just like the image I posted. I've also seen Mars images that resemble these as well.

GeoEd: Working together 

GeoLog-The official blog of the European Geosciences Union [2014-08-01 13:00:35]  recommend  recommend this post  (36 visits) info
When a geoscientist steps into a classroom, set to share their wonders of the Earth with a host of eager young minds, they are heading straight into unknown waters. Which students will rock the boat? What works well for this class and what should you steer well clear of? Not knowing the answers can turn

What Is A Caldera? 

Geology.com News [2014-07-24 13:37:06]  recommend  recommend this post  (16 visits) info
Calderas are some of the most spectacular features on Earth. They are large volcanic craters that form by two different methods: 1) an explosive volcanic eruption; or, 2) collapse of surface rock into an empty magma

What Makes A Volcano Dangerous? People 

Utah Geological Survey - blog [2014-07-23 00:54:00]  recommend  recommend this post  (32 visits) info
smithsonianmag.com Most of the world’s volcanoes are located deep beneath the sea surface along the mid-ocean ridges where the Earth’s crust spread and creates new ocean floor. Volcanoes on land often occur in subduction zones, where one tectonic plate is diving beneath another, or hotspots created by mantle plumes deep within the planet. READ

As far as the moral high-ground is concerned... 

Through the Sandglass [2014-07-21 21:17:38]  recommend  recommend this post  (32 visits) info
...the earth is flat. [sorry, just watched the evening news, couldn't help

Earth Science Week Newsletter for June 

Geology.com News [2014-07-20 13:35:44]  recommend  recommend this post  (30 visits) info

 IN
This year’s Earth Science Week will be held from October 12-18 and will celebrate the theme “Earth’s Connected Systems.” Included in the June, 2014 Earth Science Week Newsletter are…. * Earth Science Week 2014 Toolkit: Pre-Order Today! * Earth Science Week Contests Detailed in New Webcast * AIPG Aims to Educate Next-Generation Geologists * Online

Grown in Hot Rock Depths: The Geology of the Seahawks Super Bowl Rings Part I 

Rosetta Stones [2014-07-17 11:10:13]  recommend  recommend this post  (17 visits) info
The 184 diamonds in the Seahawks Super Bowl Championship rings can tell us a thing or three about Earth’s inner self. We’re still interrogating those valuable, shiny rocks (which... -- Read more on ScientificAmerican.com

1st Order Effects of Climate Change Becoming Evident in Miami Beach 

Earthly Musings [2014-07-16 17:15:00]  recommend  recommend this post  (15 visits) info

 US
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In November 2013, a full moon and high tides led to flooding in parts of the city, including here at Alton Road and 10th Street. Photograph: CorbisFor those of us in the earth sciences it is kind of mind-boggling to believe that some people still think that climate change is a hoax foisted on us only by liberals or communists. There is a billion-year record of climate change that exists in the rock record and it clearly shows that Earth's climate is subject to change. And there is a [...]

July 15, 2014 

Geology.com News [2014-07-15 13:40:58]  recommend  recommend this post  (21 visits) info

 US
Earth’s Changing Magnetism European Space Agency Oil Imports at 45-Year Low The Globe and Mail Dry Ice Gullies on Mars NASA Test Drilling North Carolina’s Davie Shale ? Winston-Salem Journal Historic Arizona Mine Data Online for Free Viewing Arizona Geological Survey Should Oil and Gas be Regulated from the Ballot Box ? ? The Hill

It's a SUPERMOON, But Then Again, the Moon is Always Pretty Cool 

Geotripper [2014-07-13 09:53:00]  recommend  recommend this post  (58 visits) info
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The Moon has an elliptical orbit, which means that it is sometimes closer and sometimes farther away from the earth. Today the moon is full and making one of its closer approaches (perigee Moon), at 222,611 miles. At other times it can be as far away as 250,000 miles (an apogee moon), which makes for a difference of about 14% in its apparent size as seen from Earth. It's also about

What Geology Has to Say About Global Warming 

State of the Planet [2014-07-11 21:00:51]  recommend  recommend this post  (20 visits) info

 AQ
The most important lessons drawn from geology are that the earth’s climate can change radically and that the pace of change can be rapid. The precision of measurement is currently too poor to give an exact answer to a critical question, At what carbon dioxide level are we in danger of melting Antarctica? However, while crude, these estimates suggest that this threshold will be reached in 150-300 years, if carbon dioxide levels continue to rise at the current

Geological Fact - Update on the Most Common Mineral 

The Geology P.A.G.E. [2014-07-08 17:54:00]  recommend  recommend this post  (19 visits) info
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Previously I had posted on "What is the most common mineral on Earth?", well some recent discoveries have come to light that have made me go back to that original post and update it. When I had originally published the post I had stated that:"Looking at the bulk composition of the Earth the most common mineral is generally regarded as olivine since the mantle makes up the bulk of the Earth and olivine makes up the bulk of the mantle." That statement had produced a couple of comments (not [...]

Fieldwork: Applying 'the present is the key to the past' 

Earth Learning Idea [2014-07-07 19:00:00]  recommend  recommend this post  (17 visits) info
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The new ELI today is 'Fieldwork: Applying 'the present is the key to the past'. This five-phase outdoor activity is used to explain how Earth scientists use the Principle of Uniformitarianism, often simply stated as ‘the present is the key to the past’, by considering the present environment and thinking how it might be preserved geologically. It is one of many outdoor ELIs - all listed on

Science Snap (#27): The Eye of the Sahara 

Between a Rock and a Hard Place [2014-07-07 09:20:07]  recommend  recommend this post  (33 visits) info
Surrounded by thousands of square miles of ubiquitous desert, the “Eye of the Sahara” peers out from the Earth’s surface and at nearly 50 km wide, its easily visible from space too. The “Eye of the Sahara” is known as a Richat Structure, a geological feature consisting of a series of alternating circular layers of
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