El Mrira 001
Name: El Mrira 001 This is an OFFICIAL meteorite name.
This is 1 of 8 approved meteorites (plus 1 unapproved name) classified as H4-melt breccia.
Physical characteristics: A notable feature of these specimens is the presence of abundant spherical to ellipsoidal vesicles and larger vugs (up to 14 mm across) in the fine grained melt-textured matrix.
Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Very fresh specimen consisting of equilibrated Type 4 chondrite clasts in a very fine grained matrix with prominent vesicles (some ellipsoidal and preferentially aligned). Lithic clasts are shock-darkened and consist of well-formed chondrules in a relatively coarse grained, recrystallized matrix containing relatively abundant kamacite plus taenite, troilite, merrillite, chlorapatite and chromite. Clasts have shock stage S4. The vesicular matrix contains distributed small silicate mineral clasts set in a partly glassy, melt-textured groundmass with dispersed composite metal+troilite spherules (up to 1.5 mm in size).