catalogue of western australian meteorite collections
catalogue of western australian meteorite collections
catalogue of western australian meteorite collections
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Plate XXVI.<br />
(a), Photomicrograph <strong>of</strong> the MeIlenbye Meteorite--showing granular aggre.<br />
gates <strong>of</strong> olivine and probably some pyroxene, apparently crushed fragments<br />
<strong>of</strong> chondrules or recrystaIlized chondrules. There is not very<br />
much glass evident and the <strong>meteorite</strong> appears to be brecciated and considerably<br />
recrystaIlized. The dark areas are nickel-iron and troilite and<br />
the white areas are cavities in this rather spongy <strong>meteorite</strong>. Magnification<br />
X25, PPL.<br />
(b) Photomicrograph <strong>of</strong> the W oolgorong Meteorite--showing large excentricfan<br />
type chondrule. The chondrule itself appears to be olivine. There<br />
is no glass present and the black material which shows in patches and<br />
veins is nickel-iron and troilite. White specks are oligocIase and this<br />
tends to fringe the chondrules. Magnification X63, PPL.<br />
(c) Photomicrograph <strong>of</strong> the Rawlinna Meteorite-showing a large olivine<br />
chondrule (a rather sparse occurrence in this <strong>meteorite</strong>) set in a granular<br />
base <strong>of</strong> olivine and subordinate orthopyroxene (both grey) nickel-iron<br />
and sulphide (both black). This <strong>meteorite</strong> appears to be slightly recrystallized<br />
and contains much more nickel-iron than is present in the<br />
*olivine-hypersthene-chondrites. Magnification X25, PPL.<br />
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