Volcanoes

Scope and Contents Letter to Sir Archibald Geikie from Capt Clarence Edward Dutton discussing his field trip to the Sandwich Islands (now Hawaii). He reports on the large scale of the ultra basic basalt lava flows of the Mauna Loa eruption and the lack of cinder cones. He reports on the ferruginous nature of the lavas and their high olivine content along with observed layers of hematite and magnetite. He describes the volcano's impressive topography and its inability to support running water. He...

Scope and Contents Letter to Sir Archibald Geikie from Capt Clarence Edward Dutton. He encloses a report by Clarence King and explains the poor quality of his own entry in this. He discusses the formation of the basaltic plateaux which are cut by the Grand Canyon in the light of some articles written by Geikie. He concludes that there are 2 models of volcanic eruption: The Mediterranean Type where many small eruptions concentrated in a small area produce cinder cones and the Rocky Mountain Type where few very...