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Posts treating: "Earth"

Monday, 15 September 2014

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The Columbia Geology Tour: Stories in the Stones 

State of the Planet [2014-09-15 15:00:58]  recommend  recommend this post  (22 visits) info

 US
For the last decade or so, Columbia University geologist David Walker has led students and colleagues on a tour of the geologic gems hiding within Columbia’s McKim, Mead and White campus in Morningside Heights. Along the way, Walker points to evidence of how life on earth and the planet itself has evolved over its 4.5 billion year

How do day/night and the seasons work? 

Earth Learning Idea [2014-09-15 11:53:00]  recommend  recommend this post  (21 visits) info
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New ELI today - 'Earth on Earth; using a globe in the sunshine to show how day/night and the seasons work'.  Pupils can use the ‘globe in the sunshine’ to: explain how the half of the Earth bathed in sunlight at any one time is experiencing day, whilst the other half is experiencing night;  point out and explain the day/night dividing lines of dawn and dusk;  show how equatorial regions

Earth Science Week 

Geology.com News [2014-09-14 16:42:49]  recommend  recommend this post  (12 visits) info

 US
The American Geosciences Institute will again host Earth Science Week, an international event that helps the public appreciate the Earth Sciences and to encourage stewardship of the Earth. This year’s Earth Science Week will be held from October 12-18 and will celebrate the theme “Earth’s Connected

The Holuhraun Lava Field (Iceland) 

Geology.com News [2014-09-14 16:05:26]  recommend  recommend this post  (35 visits) info

 IS
NASA’s Earth Observatory has an interesting satellite image of a lava flow in the Holuhraun Lava Field, located between Bardarbunga and Askja volcanoes. The image also shows impressive features in the surrounding bedrock and adjacent Vatnajokull ice

Meteorite impact i NIcargua: brief report 

Geology in Motion [2014-09-09 03:20:25]  recommend  recommend this post  (23 visits) info

 NI
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The crater from the meteorite impactFrom this referenceA fragment of the meteorite passing close to earth has made a crater in Nicaragua. I'll post more when I've got some reliable

Tweets from Wegener 2014 

Climate and Geohazards [2014-09-08 11:39:41]  recommend  recommend this post  (16 visits) info

 GB
Here are some of the highlight tweets from the Wegener 2014 conference held at the School of Earth and Environment, University of Leeds, UK. Find all the tweets at

Biggest animal ever on Earth? 

Geology in the West Country [2014-09-06 16:55:00]  recommend  recommend this post  (23 visits) info
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Meet Dreadnoughtus schrani 

Latest news - Iceland's Bárðarbunga volcano 

Geology in the West Country [2014-09-05 12:19:00]  recommend  recommend this post  (27 visits) info

 SE,NG,US,KM,IS
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Click here to keep up to date with the latest developmentsBárðarbunga is a large central vent volcano lying underneath Iceland's 500-m thick Vatnajokull glacier in the centre of the country. It is located at the junction between the eastern and northern volcanic rift zones in the area close to where some scientists consider is the present-day location of the mantle hotspot beneath Iceland. The complex rifting means that there are probably sub-surface magmatic connections to both the Grimsvotn [...]

Northern Convergence: The Mystery Photo Explained 

Geotripper [2014-09-02 08:32:00]  recommend  recommend this post  (26 visits) info
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Thanks for all of your conjectures about yesterday's mystery photo! The Earth is such a fascinating place, and there are so many different kinds of strange patterns that have different origins. Let's review some of the guesses (and they were very good, by the way): a. Sinkholes and karst topography b. Bison wallows c. Ground squirrel or prairie dog workings d. Periglacial patterned ground

Soil biology of the Antarctic Peninsula 

polar soils blog [2014-09-02 06:41:00]  recommend  recommend this post  (25 visits) info

 AU,NZ,AQ,,CA
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So far, the research I've done in Antarctica has been out of McMurdo Station. That's on the side of the continent closest to New Zealand and Australia. This coming field season, I will be doing my field work on the other side of the continent, along the Antarctic Peninsula. This is the piece of land that extends up towards South America.Image from WikipediaThe Antarctic Peninsula is one of the fastest changing regions on the planet. It is warming at one of the fastest rates on Earth. Also, [...]

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  (45 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  (34 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  (39 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  (35 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  (41 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  (93 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  (33 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
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