The best of Geology and Earth Science on the web
Welcome to all-geo.org

LATEST FROM THE GEOBLOGOSPHERE:

Monday Geology Picture: Cross-Bedding Near Bondi Beach, Australia

Georneys | 30 March, 2015
Sydney sandstone with cross-bedding.
Categories: Australia; cross-bedding; Monday Geology Picture; sandstone;

Driving Across the Most Dangerous Plate Boundary in the World: These Rocks are All Wrong!

Geotripper | 30 March, 2015
The view from Muir Beach Overlook, midway between San Francisco and Point Reyes National Seashore
Categories: accretionary wedge; California quail; Coast Range; granite; Most dangerous plate boundary; Point Reyes lighthouse; Point Reyes National Seashore; Salinian Block; San Andreas fault; subduction zone; tule elk;

Evidence of Interaction between Two Late Triassic Apex Predators

Chinleana | 29 March, 2015
I've been away for a bit, but am interested in trying to get back into the swing of things here so please bear with me.  This is a paper from late last year that I haven't mentioned before.
Categories: None

A Record Early Start to Typhoon Season: Maysak the 3rd Typhoon of 2015

It's been a record early start to typhoon season in the Western Pacific, where Category 2 Typhoon Maysak, with top sustained winds of 100 mph as of 8 pm EDT Sunday, is gathering strength in the waters a few hundred miles east of Yap State in the Caro...
Categories: None

The Id of the Squid

Deep Sea News | 29 March, 2015
Does the squid consider with only revulsion The prospect of sex under jet propulsion? Or does he think it all slightly spectacular, This flying embrace so tightly tentacular? Or perhaps he is shy, so he cleverly thinks, "Any loving we do will be hi...
Categories: Cephalopods; Mating & Reproduction; ink; poetry; rhyme; sex; squid; Tentacle;

Trees and serpentine

Oakland Geology | 29 March, 2015
There's a stretch of Castle Drive, up in the Piedmont Pines neighborhood, lined with huge trees. On the Walk Oakland map, it's even labeled "Colonnade of Eucalyptus."
Categories: oakland hazards; oakland rocks; other;

Root Stains

One of the pleasures of field work is coming across something that I know nothing about and is - well a bit perplexing. During a recent landslide assessment I came across these back stains on the soil just below the landslide scarp.  The black stains were all associated with Douglas fir roots.
Categories: landslides; odds and ends;

Totten hots up, ice shelves melting: it’s grim down south

Hot Topic | 29 March, 2015
Much news in recent weeks from Antarctica, and none of it good. An Argentinian base on the tip of the Antarctic Peninsula recently reported a new high temperature record for the continent -- 17.5ºC. A team of scientists has discovered that East An...
Categories: Climate science; environment and ecology; Antarctica; East Antarctica; Jim Renwick; Pine Island Glacier; sea level; Tim Naish; Totten Glacier; West Antarctic Ice Sheet;

Deadline for the Colloquium on Historical EQs in the Rhine Graben postponed to 3 April

Paleoseismicity | 29 March, 2015
Good news for the late birds - the abstracts deadline for the Colloquium on "Historical Earthquakes of the Rhine Graben and Interplate - Intraplate Continental Deformation: From archives to comparative seismotectonics" has been postponed to 3 April.
Categories: Meeting;

Ptiny pterosaurs of the Late Cretaceous

Forgive me for the title, it was just too tempting when talking about little pterosaurs!
Categories: None

Pilgrimage to the Semail Ophiolite with Chris Spencer | Oman

The Traveling Geologist | 29 March, 2015
For the geologist there are some places on planet Earth that are sacred. Not sacred in supernatural or mystical, but sacred in the impact they have had for our understanding of the Earth system. Of course each geologist will regard various site with differing amounts of reverence depending on interests and speciality. From my initial formal exposure to geology, the Semail Ophiolite of Oman/UAE was particularly significant. My high school geology teacher who was a former exploration geologist for Esso regailed us of adventure stories in the Rub' al Khali and Semail ophiolite. The idea that ocean crust could be obducted on the continent seemed so far-fetched to my high school mind. It seemed to contradict everything I had been taught concerning subduction and plate buoyancy, for how could a complete intact section of oceanic crust be preserved on continental crust when the density of not just the basaltic crust but also the harzburgitic mantle are so much greater than the continental margin. Of course at the time I did not understand the intricacies of back arc spreading and suprasubduction ophiolites. Despite the gaps in my understanding, I was nonetheless amazed to hear of an intact cross section of oceanic crust beautifully preserved in the Semail Ophiolite. To this day, we have yet to observe an intact sequence of oceanic crust anywhere else than in ophiolites. For over 50 years, drilling projects have tried to pierce through the entire oceanic crustal section into the mantle and none have succeeded. The deepest ocean drilling project has reached into the layered gabbros, but never reached the Moho.
Categories: Chris Spencer; Recent; Oman; ophiolite; Tectonics;

The puzzling flattening of carbon emissions and the problem of global growth

Resource Insights | 29 March, 2015
Last week we learned that maybe, just maybe, global carbon emissions were flat in 2014 even though the global economy supposedly grew by 3 percent. As Brad Plumer of Vox (whose work I greatly respect) points out, carbon emissions have moved up almost in lockstep with economic growth for the entire industrial age except during recessions and one year of growth 40 years ago.
Categories: None

A new species of Capillariid Nematode from New Caledonia.

Sciency Thoughts | 29 March, 2015
Capillariid Nematodes are parasitic worms infecting a variety of different Vertebrate hosts. The group is split into 22 genera, of which nine are parasites of Fish. Members of the genus Capillaria cause infections in a wide range of Mammals, Birds, ...
Categories: Biodiversity; Capillariid Nematodes; Groupers; Marine Biology; Nematodes; New Caledonia; Nouméa Island; Parasites; Parasitology; Taxonomy;

Green Transport Routes Are Social-Cultural-Ecological Corridors

The Nature of Cities | 29 March, 2015
Since moving from Edinburgh to London, I have greatly missed my bicycle commute along the former's Union Canal. There are similar routes in London, but they're unfortunately not on my way to work. I have always sought out such corridors and they ...
Categories: Essay; People & Communities; Place & Design; Corridors; Experiencing Nature; Networks; Planning; Transportation;

Twelve confirmed deaths in Javanese landslide.

Sciency Thoughts | 29 March, 2015
Twelve people have been confirmed dead following a landslide that hit the village of Tegal Panjang in Sukabumi District in West Java at about 10.30 pm local time on Saturday 28 March 2015. No further people are thought to be missing following the event, which completely buried eleven houses and has led to the displacement of about 300 people.
Categories: Flooding; Geohazards; Indonesia; Java; Landslips; Rainy Season; West Java;

Geosonnet 27

Lounge of the Lab Lemming | 29 March, 2015
Selenium is sulfur's sober mate, Not lost to vapor bubbles of the mind In rock or water, should one saturate They stay together, besties of a kind. Se cannot be photosynthesized To form selenate in anoxic seas From fractionation, we hypothesi...
Categories: Rheologic Rhymes;

Driving Through the Most Dangerous Plate Boundary in the World: Reconnaissance

Geotripper | 28 March, 2015
We're headed on a blog adventure through the most dangerous kind of plate boundary in the world. To make things clear, the boundary we are exploring is not currently the most dangerous in the world, although it is certainly very hazardous. As described in my introduction yesterday, most subduction zones are not easy to explore. Most parts lie underwater or deep in the crust. We are instead traveling through the fossil subduction zone in California that was active from about 200 million years to about 29 million years ago.
Categories: accretionary wedge; Coast Range; forearc basin; Great Valley; Most dangerous plate boundary; reconnaissance; San Andreas fault; subduction zone;

Ground Water Recharge and Forestry

Hal Berton has an article on one of the actions post Hazel/Oso Landslide that has taken place: seattletimes.state-tackles-steep-challenges-to-step-up-logging-oversight. Below are a couple of DEM images of the bench areas above the Town of Concrete that were mentioned in the article. There have been some slides around the perimeters of these terraces.
Categories: geology; landslides; policy;

Exaggerated Impacts of Unrealistic Water Shortages

Inkstain (John Fleck) | 28 March, 2015
A guest post of sorts* from a group of prominent economists here in the western United States questioning the findings in a widely quoted report (pdf here) by a group from Arizona State about the potential economic impact if the Colorado River went dry:
Categories: agriculture; Colorado River; economics; water;

Field Report from Mars: Sol 3971 - March 26, 2015

Planetary Society Weblog | 28 March, 2015
Opportunity reaches a marathon milestone--in more ways than one. Larry Crumpler reports on the current status of the seemingly unstoppable Mars rover....
Categories: None

Finding home

Watershed Moments | 28 March, 2015
Spring is out in full force on the West Coast, punctuated by pink cherry blossoms, yellow forsythia, and the delicately sculptured white blooms of sweet-scented magnolia. Red-winged blackbirds are puffing up to squeeze out their buzzing marsh song, a...
Categories: Watershed Moments 2.0;

Drunk on Geology - Lithology Beer (Kickstarter Campaign)

The Geology P.A.G.E | 28 March, 2015
The next up on the Drunk on Geology series is the Lithology Beer by the Lithology Brewing Company from Long Island, New York. 
Categories: Beer; Drunk on Geology;

Let's Publish Mammoth is Mopey!

As someone who has extensive experience in the field of education, I know as well as anyone how important learning is, especially science.  What many folks fail to grasp, however, is that you will never get anywhere with any learner (regardless of age) unless they are having fun or are in someway invested.  It's true.  This brings me to a book written and illustrated by David Orr from over at Love in the Times of Chamsosaurs, titled Mammoth is Mopey.
Categories: None

Geo 1095: March 28, Day 817: Over the Rivers and Through the Woods

Outside the Interzone | 28 March, 2015
The sign above and to the right of Dana's head reads "Entering Over the Rivers and Through the Woods Oregon Scenic Byway." Here's some information on that route, and I won't argue with its scenic nature... but behind us, and to the left (we're looking more or less west, here), are some of the most scenic routes in the state. See numbers 5 and 6 at that last link. In the mid-distance, you can see an abrupt transition from bouldery ground and sparse vegetation to a large, uniform stand of old growth Douglas fir. That transition marks the edge of the most recent lava flow in this area.
Categories: Earth; Geo 1095; Geology; Oregon;

Geo 1095: March 27, Day 816: Fiery Flow

Outside the Interzone | 28 March, 2015
Continuing over Tombstone Pass, after the site of the most recent posts, we come to McKenzie Junction. I've posted a number of photos from here before, which were also taken on this particular day trip. However, I was just starting the Geo series, and there were quite a number of shots I skipped at the time that I think are worth sharing. In addition, since those earlier posts, I've been back to the McKenzie trough/River/Pass at least three or four times, so I'll be mixing in some shots from those trips as well. You  might like to review the geology of this spectacular area in these posts from the wayback machine:
Categories: Earth; Geo 1095; Geology; Oregon;

Latest: A year of Anne’s reading…reporting from 2 months in

Latest: Unifying Theory of Geology Class

Latest: How to watch the eclipse on the side of your car

Latest: Into the Third Dimension: using Google Maps to know what’s underground



- The new timelapse timesink

- Are geologists mostly lefties?

All-geo.org