How big was that asteroid? The latest geochemist/geophysicist smackdown
What's the most accurate method of estimating the size of asteroids associated with past impact events?Posted on April 17, 2008 10:18 AM • 4 Comments •
Highly Allochthonous
Vaguely Informed Commentary From the Wide World of Earth Science
Profile
Chris Rowan is a geologist specialising in the dark arts of paleomagnetism, and getting people to pay him to travel to exotic destinations for fieldwork. Having drilled up New Zealand during his PhD, he is now a post-doc at the University of Johannesburg.
What the heck does 'Highly Allochthonous' mean?
Geoblogosphere latest
Recent Comments
- Traumador the Tyrannosaur on Active, dormant, and extinct volcanoes
- Transient Reporter on Geopuzzle #11
- (((Billy))) on Active, dormant, and extinct volcanoes
- coconino on Active, dormant, and extinct volcanoes
- Mel on Geopuzzle #11
- BrianR on Geopuzzle #11
- Lost Geologist on Geopuzzle #11
- Chris Rowan on What's up with those Archean sandstones?
- justawriter on Active, dormant, and extinct volcanoes
- H.Bos on Archean bacterial mats under the hammer
Recent Posts
- Geopuzzle #11
- Active, dormant, and extinct volcanoes
- What's up with those Archean sandstones?
- Archean bacterial mats under the hammer
- Publication tag clouds
- Sabbatical
- A planet is for life, not just for Earth Day
- Rock Gallery
- How big was that asteroid? The latest geochemist/geophysicist smackdown
- Distressingly normal corals infest nuclear test crater
Blogs I read
-
Geology
- All of My Faults are Stress Related
- Andrew Alden
- Apparent Dip
- Clastic Detritus
- Geotripper
- Green Gabbro
- Good Schist
- Harmonic Tremors
- Hindered Settling
- Lab Lemming
- Lost Geologist
- Magma cum Laude
- NOVA Geoblog
- Olelog
- Ontario Geofish
- Ron Schott
- Sismordia Fossils
- Afarensis
- The Ethical Palaeontologist
- Fish Feet
- Darren Naish
- Laelaps
- The Lancelet Climate
- Head In a Cloud
- James' Empty Blog
- Open Mind
- RealClimate
- Stoat Misc. Science
- According to Colwell
- Bad Astronomy
- Bad Science
- Centauri Dreams
- Panda's Thumb Scientists
- Am I a woman scientist?
- Minor Revisions
- Propter Doc
- Rising to the Occasion
- Sciencewoman Carnivals
- The Accretionary Wedge
- The Boneyard
- Philosophia Naturalis
- What's up Postdoc?
Categories
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Search this blog
Other Information
planets:
Behold, a new sunspot...
The little fellow circled here (in the solar sense of "little" - it's probably a few thousand miles across) appeared on the 4th January, and probably marks the start of Solar Cycle 24. A slight dent in those bold...Posted on January 23, 2008 7:35 AM • 1 Comments •
What on Google Earth?*
Jani has been exploring the Sahara Desert using Google Earth, and would like to know if this structure in southeast Algeria is a crater or not (it can be found at 22 48' N 9 29' E): Before I give...Posted on January 9, 2008 11:37 AM • 60 Comments •
Don't put your faith in (no) sunspots
Reports of a Maunder-like minimum are somewhat prematurePosted on December 13, 2007 12:20 PM • 5 Comments •
Martian plate tectonics
Are striped magnetic anomalies on the Red Planet evidence of ancient sea-floor spreading?Posted on December 12, 2007 10:00 AM • 3 Comments •
Venusian datafest in Nature
Anyone interested in Venus will be very happy with this week's issue of Nature, which has published a raft of papers detailing the latest findings of the European Space Agency's Venus Express probe, which has been orbiting our inner planetary...Posted on November 29, 2007 12:26 PM • 0 Comments •
Polar views
The north pole of Titan, courtesy of Cassini: Here's why we think the dark patches are lakes, which everyone is very excited about. The first snapshots of Titan's southern polar region have also found a couple of probable small lakes,...Posted on October 12, 2007 12:45 PM • 0 Comments •
The source of Enceladus' plumes
An interesting picture from Enceladus, currently everyone's favourite geologically active, extra-terrestrial body:...Posted on October 11, 2007 8:28 AM • 1 Comments •
Out of the ice age, into the asteroid shower
Was the biggest cold snap in the last deglaciation caused by an extraterrestrial impact?Posted on October 3, 2007 9:20 AM • 16 Comments •
Peru's new crater extra-terrestrial, but illness not
One of the main risks of our media-saturated world is that although events can make it onto our TV and computer screens with unrivaled speed, this does not necessarily mean we have any idea of what's actually going on, which...Posted on September 25, 2007 4:49 PM • 3 Comments •
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