Johnstown vs Stannern

Johnstown is a diogenite meteorite that fell near Johnstown, Colorado, in July 1924 after a witnessed fireball and detonations. About 23 kilograms of material were recovered, making it a substantial documented diogenite fall. Its coarse-grained, orthopyroxene-rich composition places it within the howardite-eucrite-diogenite clan, meteorites generally interpreted as samples from deep within the cru...

Stannern is a eucrite meteorite that fell in Moravia, in the present-day Czech Republic, on 22 May 1808. Eucrites are basaltic achondrites belonging to the HED clan and are generally interpreted as material from the crust of the asteroid Vesta. Stannern gives its name to the Stannern trend, a geochemical pattern among certain eucrites marked by relatively high incompatible-element and rare-earth-e...