110830 - Image of the Month for September

BIMS news forum, these are the items you read on the main BIMS page. BIMS members please feel free to add comments and discuss the items in this forum.

110830 - Image of the Month for September

Postby Matt Smith » Tue Aug 30, 2011 8:09 pm

Image
For September we have an image of the Springwater pallasite meteorite. This is a main group pallasite with anomalous properties (PMG-an) first found in 1931 in Canada. Further specimens have been unearthed in recent years. The specimen pictured is part of the Natural History Museum, London collection and is on display at one end of the minerals gallery just outside "The Vault". Click here to view the image in the Gallery.
User avatar
Matt Smith
Site Admin
 
Posts: 214
Joined: Thu Apr 28, 2011 8:57 pm
Location: North-west

Re: 110830 - Image of the Month for September

Postby Matt Smith » Wed Aug 31, 2011 3:08 pm

Interesting point about this stone, I'd be like to hear some opinions. After I posted it yesterday I'd left the meteoritical bulletin webpage for it open in my browser. Today I clicked on a few of the images linked from there (try for yourself here). Every other Springwater specimen I've looked at images of has clearly rounded olivine crystals. Compare any of the images linked from the meteoritical bulletin page to the NHM image I posted above. The specimen on display at the NHM has sharp angular olivines throughout.

I double checked my images and I'm certain my image is of the specimen labeled Springwater. Can anybody find another Springwater example with angular olivines? Any ideas?
User avatar
Matt Smith
Site Admin
 
Posts: 214
Joined: Thu Apr 28, 2011 8:57 pm
Location: North-west

Re: 110830 - Image of the Month for September

Postby Barwellian » Wed Aug 31, 2011 5:48 pm

Hi Matt,

I had exactly the same thought when I saw it, but did not follow it up, dismissed my thoughts as it seemed silly to think they had it labeled wrong. Mike Farmer had several slices of the new finds in Ensisheim and I had noted that they all had rounded olivines similar to