Tracks in Deep Time

The St. George Dinosaur Discovery Site at Johnson Farm

By: Jerald D. Harris, Andrew R.C. Milner

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Paperback | 29 May 2016

At a Glance

Paperback
112 Pages

Age
13 - 17

Grade
8 - 12

Dimensions(cm)
25.4 x 21.6 x 0.8

Paperback

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In February 2000, while excavating his property in St. George, Utah, Sheldon Johnson turned over a piece of ground and discovered a fully preserved dinosaur footprint. That track was the first of many fossils to be uncovered. Five years later, the St. George Dinosaur Discovery Site (SGDS) at Johnson Farm was established to preserve one of the richest and oldest dinosaur-age fossil sites in Utah.

Tracks in Deep Time presents, for the first time, an engaging, thoroughly readable account of the history, geology, and paleontology of this important site. Two hundred million years ago, Lake Dixie covered this area. Within its waters and along its shores, a diverse ecosystem of organisms thrived, leaving behind thousands of footprints and other fossils preserved in layers of rock. Unusual fossils found here include the world's largest collection of tracks left by swimming dinosaurs, and one of only six traces known to have been made by a sitting, meat-eating dinosaur. With approachable text and lavish, full-color photographs and illustrations, Jerald Harris and Andrew Milner describe how geologists and paleontologists have painstakingly reconstructed a vivid snapshot of life from the Early Jurassic.

Industry Reviews

"This book will enhance the experience of anyone visiting the St. George Dinosaur Discovery Site. It provides an exceptional opportunity for readers to explore the thrill of scientific discovery and the enchantment of Utah's prehistoric life." -Frank L. DeCourten, author of Dinosaurs of Utah and The Broken Land: Adventures in Great Basin Geology "This is a fantastic read for teens and adults with an interest in paleontology and geology. Harris and Milner describe in detail how scientists discover, classify and interpret various types of fossils. The scientists piece together what they learn from the geological evidence to bring prehistoric eras to life." -Deseret News "Every page of this book aims to provide context, placing the discoveries within a history of scientific knowledge, and the prehistoric animals themselves within a geologic and evolutionary history. . . .This was an enjoyable voyage into the paleontology of southwest Utah and a great read."-Quarterly Review of Biology

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