Vznik, výskyt a využití vulkanického skla

Abstract

The theme of this bachelor work is “volcanic glass”. The thesis is oriented on types of volcanic glass – obsidian, pearlit, pumice, smolek and on their utilization both in the past and also in present. In one chapter there is paid attention to both the general characteristics and the utilization of volcanic glass. Also the preparing of a tour is the next theme, which includes the tour program, the proposal of the journey, assortment, quality and services, the proposal of the timetable, the price calculation, instructions for participants and at last the preparing of the itinerary.