Posts

May 03, 2015

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12:29 PM | Geosonet 28
<!--[if gte mso 9]> Normal 0 false false false MicrosoftInternetExplorer4 <![endif]--> The Mesozoic ended with a splat But what about a vastly older time? Archean life was breathing algal mat Did asteroids destroy them in their prime? The spherule layer in the Kuruman Contains iridium, enriched by mass. Though seared in orogenic frying
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10:27 AM | Science talk series
In continuation to our science talks, the next presentation was made by Dr. Ravi Mishra, from IODP-India at National Centre for Antarctic and Ocean Research (NCAOR), India. read more
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5:05 AM | Work on Yosemite's Ferguson Slide Continues, and Can Someone Tell Me What These Folks Are Up To?
Ferguson Slide on May 2, 2015Three weeks ago I passed the Ferguson Slide on the way to Yosemite, and found that work had begun on mitigating and stabilizing the slide so an avalanche shed could be constructed to protect vehicles from rolling boulders. Check out my previous post on the subject for details of the slide and the work being done. I was up there again today, and saw that a lot of progress has been made towards removing debris and coating the slope with boulder containment netting. […]
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3:40 AM | Arizona county geologic maps posted online
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2:58 AM | EarthCube All Hands Meeting organized by AZGS
AZGS is organizing the annual All Hands Meeting for the National Science Foundation's EarthCube program, to be held in Arlington VA, May 27-29.   EarthCube is testing the ability to build a community-led cyberinfrastructure for the geosciences.   AZGS is running the Test Enterprise Governance project which is in the midst of a year-long demonstration phase testing out community recommendations on coordination, collaboration, and communication.    AZGS also […]
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2:46 AM | Mars crater named after ASU's Ron Greeley
A large, ancient crater – nearly as wide as Arizona – now carries the name of Greeley Crater, in honor of Ron Greeley, the Mars science pioneer and longtime professor of planetary science at Arizona State University.Ron was involved in almost every major solar system robotic mission flown since the late 1960s and advanced the study of planetary science at ASU.The crater, which spans 284 miles, lies in Noachis Terra, the geologically oldest terrain on Mars. Although the crater's […]

May 02, 2015

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11:34 PM | Stuck
"We are stuck" are the words that nobody on a scientific drilling expedition ever wants to hear but this is what happened to us today as we were trying to reenter our hole. It seems that the unstable sands collapsed in and trapped our pipe on the way back to the bottom of the hole. read more
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9:30 PM | Geo 1095: May 2, Day 852: Joint Surveillance
Here we're looking basically perpendicularly into another pair of approximately parallel joint planes. The lens cap (52 mm diameter) is resting against the farther joint, and there a similar plane in the upper right quadrant. It should be clear, even in this shrunken format, that the rock is chock-a-block with a myriad of little holes. These are gas bubbles, referred to as vesicles, that were created as the original lava depressurized and cooled, just like bubbles forming in a carbonated drink […]
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6:51 PM | Earthquake activity in Askja volcano
During the week there has been a swarm of minor earthquakes in Askja volcano. All of the earthquakes have been small and none have reached magnitude 2,0 far as I know. Askja volcano is the volcano most south … Continue reading →
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2:35 PM | My Passion
National Blog Posting Month – May 2015 – Theme: Photo Photo prompt: Your Passion — — Join me for May’s NaBloPoMo Photo Prompts:
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10:41 AM | 2015 SkS Weekly News Roundup #18B
Amazon: 1% of tree species store 50% of region's carbon California Governor orders new target for emissions cuts Caribbean stakes out “red lines” for Paris climate talks Climate change could eventually claim a sixth of the world’s species Climate change joins terrorism, the economy as a top diplomatic issue Climate change will significantly affect Australians’ health, report finds College students are making global warming a moral issue. Here's why that […]
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8:51 AM | Gorkha Earthquake – the slowly emerging landslide picture
Bit by bit details are emerging of losses associated with landslides in the Gorkha Earthquake in Nepal. The overall picture remains very unclear though
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4:32 AM | “You can almost see its feet.”
I sent Lissa a picture from the Arizona side overlook of Hoover Dam this evening. Her response: “You can almost see its feet.” I drove out from Las Vegas to see Lake Mead and Hoover Dam this evening after a two-day Colorado River law and policy conference in a windowless hotel meeting room. Speaker after ...Continue reading ‘“You can almost see its feet.”’ »
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3:06 AM | Mars Exploration Rovers Special Update: MERathon Celebrates Opportunity's Marathon
MER mission ops team members joined other engineers and scientists, some who previously worked on the MER mission, to take on the challenge of a relay marathon to celebrate Opportunity's milestone achievement.
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12:52 AM | New dyke intrusion in Katla volcano
Yesterday (01-May-2015) a minor dyke intrusion took place in Katla volcano. This dyke had depth down to 26,9 km and up to 18,5 km. This is the second dyke intrusion in this are in short space of time. … Continue reading →
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12:28 AM | Radiolarian Man
Today we are waiting for coring to resume after changing the bit so I have the opportunity to introduce you to Girish Sharma from Kumaun University in India who is one of our paleontology group.  His particular speciality lies in the field of radiolarians. read more

May 01, 2015

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11:55 PM | Farewell, MESSENGER
There is one less robot exploring the solar system today. MESSENGER, which has orbited Mercury for four years, finally ran out of fuel and crashed into the planet at 17:26 UT on Thursday, April 30, 2015.
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11:46 PM | Anonymity in peer review
<!--[if gte mso 9]> Normal 0 false false false MicrosoftInternetExplorer4 <![endif]--> <!--[if gte mso 9]> <![endif]--><!--[if gte mso 10]> /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0cm
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11:04 PM | Why Lake Mead could drop an extra 15 feet next year, and shortage could be more likely than we expect
While we’ve all been obsessing over the elevation of Lake Mead, there’s a second looming lake elevation problem that could really complicate Colorado River management and increases the risk of a 2016 Arizona shortage declaration beyond the current estimates. Depending on how things play out over the next couple of months, this second problem could ...Continue reading ‘Why Lake Mead could drop an extra 15 feet next year, and shortage could be more likely than we expect’ […]
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10:11 PM | Driving Through the Most Dangerous Plate Boundary in the World: Exploring the Belly of the Beast in the Diablo Range
A long time ago (a few weeks; that's years in internet time) I began this series about driving through the most dangerous plate boundary in the world. Convergent boundaries with their subduction zones or gigantic thrust faults are the most dangerous boundaries that exist on the planet. We need no more reminder than the horrible tragedy that unfolded this week in Nepal.California was once dominated by such a boundary, from about 200 million years to just a few tens of millions years ago. The […]
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9:00 PM | Large Herbivore Loss May Create 'Barren Landscape'
Large herbivores are on the decline around the globe, which could empty out some of the world's most diverse landscapes.
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8:43 PM | Geo 1095: May 1, Day 851: Lichen the Joints
As I indicated yesterday, joints cutting through more or less solid, blocky rock are crucial to understanding how the enormous amounts of precipitation that falls in the High Cascades as rain and snow simply disappear over the many square miles that comprise this plateau. This is a surficial feature, and I'd guess the deeper buried joints don't tend to be as wide, but clearly, even at a fraction of this width, such fractures would allow rain and snow melt to easily trickle down to the water […]
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8:02 PM | Dawn Journal: Getting Down to Science at Ceres
Dawn Mission Director and Chief Engineer Marc Rayman gives a status update on the mission, having finally arrived at dwarf planet Ceres.
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7:42 PM | Fossil Friday – western pond turtle costal plate
Fossil preservation is a tricky thing, and the variables involved in fossilization can have a major effect on what eventually gets preserved (a major subfield of paleontology, taphonomy, looks at this very issue). For vertebrates, one factor that can give … Continue reading →
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6:00 PM | Friday Headlines: 5-1-15
Friday Headlines, May 1, 2015 THE LATEST IN THE GEOSCIENCES   Today’s round-up: Nepal Chilean volcano It’s a bird! It’s a bat! It’s a… dinosaur? M7.8 – 34km ESE of Lamjung, Nepal A massive earthquake struck Nepal, killing thousands of … Continue reading →
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4:19 PM | MESSENGER
Alien orbits you plied, While we vicariously spied A distant globe …
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3:33 PM | NEPAL QUAKE: Doctors Race to Help Quake Injured
Overwhelmed doctors make split-second life or death decisions, as the death toll in Nepal crosses, 6,200. Continue reading →
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2:58 PM | Duncan aftershock felt by residents
A magnitude 2.3 earthquake near Duncan Arizona, at 10:24 pm Monday night was likely another aftershock from last June's magnitude 5.3 quake.   What is interesting is that this small event was felt by local residents.  Typically, it takes a magnitude 3 or larger for it to be felt.AZGS has a temporary seismometer deployed in the area, so we were able to come up with a more accurate location (red dot on photo map) than the one posted by the USGS using their regional network.
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2:35 PM | On Selfies
National Blog Posting Month – May 2015 – Theme: Photo Prompt: Do you like taking selfies? Why or why not? Photo prompt: You — Yes, I like taking selfies. Maybe not as much as the next younger generation, but I … Continue reading →
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2:12 PM | Smooth Sailing Back to Tasmania
After a surprisingly smooth crossing of the Southern Ocean, with favorable winds we arrived back in Hobart, Tasmania. The weather maps show that we just got ahead of another big storm system.
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