Acta naturalia Islandica - 01.02.1946, Side 84

EXPLANATION OF PLATE I.
Fig. 1. Breccia of Þverávnúpur. Slide 286, X2.3. The two largest
fragments are mostly opaque glass, the others are siderófn-
elan. Text p. 24.
Fig. 2. Same slide, XT.l. Illustrating the breaking uj) of the g-lass
in situ.
Fig. 3. Same slide, XT.l. Illustrating the same as Fig. 2.
Fig. 4. Breccia at Kirkjubæ.iarklaustur. Slide 282, X2.3. Frag-
ments of unworn sideromelan. Text p. 25.
Fig. 5. Tuff of Kerlingardalsheiði. Slide 290, X14.5. Text p. 23.