[Prev][Next][Index][Thread]

Re: (meteorobs) Iridium from Impacts vs Volcanism





--- GeoZay@aol.com wrote:
> 
> Both asteroid impacts on earth and Volcanoes give
> off Iridium I understand. 
> Is there anything different about the Iridium from
> both sources that would 
> enable one to say that it definitely came from an
> asteroid or a volcanoe? 

I was once in a lecture on the topic. More Iridium is
given (I think) from Asteriods, but that wasn't why
they think that Dinosaurs got extinct from asteroids
rather than volcanoes. Today scientists believe that
the extinction was caused by an Asteroid. I don't
remember the main reason, though.
===
Asaf Shtull-Trauring, Amateur Astronomer
_________________________________________________________
Do You Yahoo!?
Get your free @yahoo.com address at http://mail.yahoo.com

To UNSUBSCRIBE from the 'meteorobs' email list, use the Web form at:
http://www.tiacdot net/users/lewkaren/meteorobs/subscribe.html

Follow-Ups: