54 
A.W.R. Bevan, E.M. Shoemaker, C.S. Shoemaker 
Figure 2 Fragments of the Veevers meteorite (WAM 13731-13762) recovered from the area to the east of the crater 
vsee rigure 1). 
shear-zones are evident that intersect at ca. 60° and 
some shear-zones have been propagated along pre¬ 
existing Neumann bands. In the fragment WAM 
13761, in addition to zones of shear deformation, 
there are occasional diffuse, sinuous lines of 
stained metal that do not appear to be associated 
with plastic deformation. One such sinuous line is 
cut and displaced by a shear-zone indicating that 
the structure from which it was formed pre-dates 
plastic deformation of the metal (Figure 4c). The 
displacement of the structure indicates that the 
throw of the shear zone is ca. 400 pm. 
The suspected grain boundary in fragment WAM 
13735 is heavily invaded with terrestrial corrosion 
products that have masked the original structure. 
Vestiges of troilite occur and, locally, terrestrial 
oxides pseudomorph a pre-existing eutectic-like 
structure. Other minerals observed in the unaltered 
portions of Veevers fragments include carlsbergite 
(CrN) and an unidentified, partially resorped 
mineral (Figure 4b), probably roaldite ([Fe,Ni] 4 N) 
(Nielsen and Buchwald 1981), the latter occurring 
rarely as narrow (1-2 pm), long (up to 1.2 mm) 
lamellae. Neither y-FeNi (taenite), nor shock- 
hardened e-kamacite transformations were 
observed. 
Structural classification 
All previously described irons belonging to 
chemical sub-group IIB with Ni contents in the 
range 5.5-6.9 wt % are structurally coarsest 
octahedrites (Ogg) with a-kamacite bandwidth^ 
>3.3 mm (Buchwald 1975). Disruption of the 
Veevers projectile during impact has destroyed the 
original macro-structure of the meteorite 
However, the nature of the surviving fragments 
gives some indication of the original structure of 
the meteorite. The shape and mineralogy of the 
fragments show that, predominantly, the structure 
of the meteorite comprised irregular, stubb' 
lamellae of kamacite (L/T c.1.6-6.5). From their 
plate-like morphology, it follows that the 
maximum thicknesses of the surviving fragments 
are likely to approximate to the kamacite 
