Veevers crater-forming iron meteorite 
53 
Table 1 Numbers, weights and dimensions of iron meteorite fragments found at Veevers impact crater 
Field No. 
WAM No. 
weight (g) 
length L (mm) 
max.thickness T (mm) 
VC-1-84 
13645 
8.9 
17.9 
11.4 
VC-4-84 
13646.1 
4 
32.9 
5.05 
VC-4-84 
13646.2 
2.2 
23.9 
4.6 
VC-4-84 
13646.3 
<0.1 
(fragments) 
VC-1-86 
13731 
6.9 
26.75 
8.05 
VC-2-86 
13732 
2.5 
20.4 
5.75 
VC-3-86 
13733 
1.8 
15.7 
4.9 
VCM-86 
13734 
12.4 
20.3 
9.2 
VC-5-86 
13735 
13.9 
33.1 
9.3 
VC-6-86 
13736 
4.5 
27.3 
6.5 
VC-7-86 
13737 
9.3 
25.5 
8.9 
VC-8-86 
13738 
3.9 
16.05 
8.25 
VC-9-86 
13739 
6 
20.6 
8.55 
VC-10-86 
13740 
1.3 
21.15 
4.6 
VC-11-86 
13741 
8.5 
24.8 
8.9 
VC-12-86 
13742 
4.7 
20.35 
8.45 
VC-13-86 
13743 
13.8 
30.35 
11.1 
VC-14-86 
13744 
18 
26.95 
12.95 
VC-15-86 
13745 
12.2 
34.7 
7.3 
VC-16-86 
13746 
1.9 
15.85 
4.4 
VC-17-86 
13747 
17.8 
24.35 
12.95 
VC-18-86 
13748 
2.8 
17.75 
5.2 
VC-19-86 
13749 
7.7 
19.45 
7.8 
VC-20-86 
13750 
2.3 
15.85 
5.6 
VC-21-86 
13751 
1.3 
(small fragments) 
VC-22-86 
13752 
26.6 
(specimen used for terrestrial age determination) 
VC-23-86 
13753 
4.7 
15.65 
7.0 
VC-24-86 
13754 
4.9 
17.5 
8.75 
VC-25-86 
13755 
6.2 
21.75 
7.8 
VC-26-86 
13756 
5 
19.5 
7.2 
VC-27-86 
13757 
4.8 
19.0 
6.75 
VC-28-86 
13758 
4.6 
17.1 
8.1 
VC-29-86 
13759 
6.6 
22.0 
6.05 
VC-30-86 
13760 
19.1 
36.0 
11.3 
VC-31-86 
13761 
36.3 
31.35 
15.4 
VC-32-86 
13762 
10.6 
26.8 
8.3 
transformed to unequilibrated, ragged a 2 -kamacite 
similar to that found in the heat affected zones of 
freshly fallen irons. Metal in the fragments WAM 
13761 (36.3 g) and WAM 13735 (13.9 g) found to 
the east of the crater shows complete 
transformation to coarse (10-200 pm units), ragged 
a 2 , whereas the largest fragment (WAM 13645 - 8.9 
g) found to the north of the crater is only partially 
transformed to finer grained (5-50 pm) oq units, 
mainly along zones of intense shear deformation. 
One fragment (WAM 13761) displays several 
mm-sized inclusions of schreibersite [(FeNi) 3 P], 
and both fragments examined contain abundant 
rhabdites (prismatic crystals of schreibersite). In all 
fragments examined, schreibersite crystals and 
rhabdites are kinked, kneaded and deformed, and 
their grain boundaries show incipient reaction 
haloes with the surrounding metal (Figure 4a). 
Evidence of shock-melting in Veevers is sparse. 
However, where shear-zones intersect large 
crystals of schreibersite, small (< 20 pm) cloudy, 
wedge-shaped pools of shock-melted phosphide 
have been generated that penetrate the phosphide 
from the phosphide-metal interface. Additionally, 
some rhabdites have been smeared out and melted 
along zones of shear deformation. 
Portions of fragment WAM 13645 that have not 
been transformed to a 2 show deep-seated 
Neumann bands (mechanical shock-twins) that are 
degenerated (Figure 4b), and sub-grain boundaries 
that are decorated with rhabdites. The fragments 
have been plastically deformed and the metal is 
traversed by a few intense zones ( <1 mm wide) of 
shear deformation characterized by sub- 
microscopic recrystallization. Locally, terrestrial 
corrosion has penetrated along cracks developed 
in the shear-zones making them visible to the 
naked eye. Several shear-zones run parallel with, 
and close to, the outer surfaces of the fragments. In 
the fragment from north of the crater, three sets of 
