Dennis Tasa Apps

Folds and Faults provides an illustrated overview of two significant topics in geology: folds and faults. Understanding folds and faults helps to explain how mountains form, how layers of rock...

Arches National Park Geology Tour HD provides an illustrated and narrated introduction to the geology of Arches National Park for the iPad. Illustrations, animations, and photos by Dennis Tasa are...

Folds and Faults HD provides an illustrated overview of two significant topics in geology: folds and faults. Understanding folds and faults helps to explain how mountains form, how layers of rock...

Arches National Park Geology Tour provides an illustrated and narrated introduction to the geology of Arches National Park. Illustrations, animations, and photos by Dennis Tasa are narrated by...

This app displays the Geologic Time Scale that represents the timeline for Earth's history. The Geologic Time Scale shows the names of the eons, eras, periods, epochs, and ages along with their...

Focus on Earthquakes provides a comprehensive description of the causes and consequences of earthquakes. In addition to the text, this new-media textbook provides illustrations, photos, narrated...

This app displays the Geologic Time Scale that represents the timeline for Earth's history. The Geologic Time Scale shows the names of the eons, eras, periods, epochs, and ages along with their...

This app displays the Geologic Time Scale that represents the timeline for Earth's history. The Geologic Time Scale shows the names of the eons, eras, periods, epochs, and ages along with their...

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 narrated by geologist Deborah Ragland, Ph.D. with...

Mineral identification is finally made easy with the Mineral Database compiled by M. Darby Dyar and Mickey E. Gunter and illustrated by Dennis Tasa. This app provides a quick reference for...