Dr Mario Fischer-Gödde and his colleagues say the killer rock was a huge carbonaceous chondrite (C-type) asteroid, a carbon-rich type that is common in the solar system but rarely impacts Earth.

This study compares the geochemistry of chondrules in the carbonaceous chondrite Allende to that of terrestrial komatiite and basaltic komatiite samples from the Archean eon. This comparison provides ...

One example is a carbonaceous chondrite (a type of meteorite), also known as CAI in Allende. Scientists believe these were the very first things to become solids after the sun was first formed.

I am unravelling the history of an unusual group of carbonaceous chondrite meteorites that are believed to be similar to a certain group of water bearing asteroids; two of which are the targets of a ...