Mem. Nat. Mus. Vict., 14, Pt. 2, 1946. 
SOME UNUSUAL SHAPES AND 
FEATURES OF AUSTRALITES (TEKTITES). 
By George Baker, M.Sc., 
Geological Department, Melbourne University. 
Plates VI-XIV. 
(Received for publication 6th June, 1944) 
Some rare types of australites, differing from the common forms 
in shapes and surface structures are recorded in this paper. 
Twenty-nine were selected from 880 specimens collected hy myself 
and friends near the Sherhrook River, a few miles cast of Port 
Campbell (Baker, 1937), and two from a collection of Western 
Australian specimens in the Geological Department, Melbourne 
University. 
Their weights, specific gravities and dimensions are set out in 
Table I (see page 51). In the diameter column, figures not 
bracketed refer to external diameters of flanges, bracketed figures 
to internal diameters. 
Plate VI 
Pig. 1. An oval, traylike form without a central core ; the lightest complete 
and unweathered australite on record. The flat anterior surface curves 
at the edge-s, and the posterior surface is slightly concave ; both surfaces 
have strongly marked, contorted flow lines, and a bubble cavity, 1 mm. 
across, forms a small hole through the specimen. Locality: Six miles 
east of Port Camphell. 
Fig. 2. An oval, platelike australite with flat posterior surface, slightly concave 
anterior surface, and small core 2X3 mm., surrounded by minute, 
elliptical bubble pits. The few flow lines are confined to the posterior 
surface. Locality : Three and a quarter miles east of Port Campbell. 
Figs. 3A and 3B. Side and posterior aspects of a bowl-shaped form (Baker, 
1940) w’ith a smooth rounded lip, a small core with flow lines at the 
base of the bowl, and numerous minute bubble pits on both surfaces; 
the walls of the bowl slope uniformly down to the core, which is not 
visible in the photograph. Locality: One and a half miles east of 
track to Loch Ard Gorge. 
Plate VII 
Pig. 4. An elongated form, canoe-shaped in side aspect. The flange, which is 
developed on one side (left-hand side in fig. 4) and partly along one 
end, arises at an angle of 80° from the core; it is thin andj;'its 
47 
