Scope and Contents

Letter to Leonard Horner from Sir Charles Lyell discusing the internal structure of lava flows. Lyell also remarks on the probable nature of the additions to the core of Mount Vesuvius that had occurred that year, with illustrations, 10 December 1857.

Scope and Contents Letter to Sir Archibald Geikie from Capt Clarence Edward Dutton telling him that he is undertaking field work in New Mexico. He is concentrating on the plateau country aided by good topographic maps of the region. He tells Geikie that there are landforms and cliffs similar to those in Utah and Arizona with exposures of Triassic, Permain and Cretaceous strata. These are overlain with evidence of volcanic activity, ancient basalt of 50-200 feet depth on the plateau. Young basalt, in vast lava...