Tasa Graphic Arts, Inc.

Explore the three types of rock found on Earth and understand the geologic processes that create and transform them. View high resolution photos of ro …

Mineral identification is finally made easy with the Mineral Database compiled by M. Darby Dyar and Mickey E. Gunter and illustrated by Dennis Tasa. T …

Grand Canyon National Park Geology Tour is a photographic tour of the South Rim of the Grand Canyon with an emphasis on the geology. Written and narra …

Focus on Earthquakes provides a comprehensive description of the causes and consequences of earthquakes. In addition to the text, this new-media textb …

Folds and Faults HD provides an illustrated overview of two significant topics in geology: folds and faults. Understanding folds and faults helps to e …

Arches National Park Geology Tour HD provides an illustrated and narrated introduction to the geology of Arches National Park for the iPad. Illustrati …

Arches National Park Geology Tour provides an illustrated and narrated introduction to the geology of Arches National Park. Illustrations, animations, …

The pangaea app dynamically shows the breakup of the supercontinent Pangaea and the positions of the continents over the last 200 million years. Signi …

Need a quick reference to the geologic time scale of Earth's history? Find out, for example, when dinosaurs ruled the world or when reptiles first app …

Folds and Faults provides an illustrated overview of two significant topics in geology: folds and faults. Understanding folds and faults helps to expl …