Johnstown main content.


Part of Hall of Meteorites.

C.2.2.4. Johnstown. More melting hero

Exhibition Text

More melting

The Johnstown meteorite comes from a large asteroid, probably Vesta, that melted and differentiated. It is low in iron, nickel and other elements that sank to the asteroid core. It is also poor in aluminum and calcium, which seeped to the surface in volcanic basalts like the Camel Donga meteorite in this case.

This sample is the "main mass" of the Johnstown meteorite, meaning it is the biggest fragment of Johnstown ever found.

Collection Information


Fell February 6, 1924 Weld County , Colorado, USA


AMNH 2493

For Educators

Topic: Earth Science

Subtopic: Meteorites

Keywords: Meteorites, Astrophysics, Chemical elements, Astrogeology, Asteroids

Audience: General