Note 275 — Chapter XL · THE MODERN VOLCANOES OF ICELAND AS ILLUSTRATIVE OF THE TERTIARY VOLCANIC HISTORY OF NORTH-WESTERN EUROPE
Reading edition
On the various modes of origin of these chasms, see Dr. Tempest Anderson, Brit. Assoc. Rep. p. 650. The gjá shown in Fig. 292 is not an eruptive fissure. For this and the following illustration I am indebted to the kindness of Dr. Tempest Anderson, who himself photographed the scenes.