Gr 8 Up-In the first book, Erickson presents an overview of the challenges facing this relatively new science. In thorough discussions, he examines such topics as desertification, deforestation, erosion, and earthquakes and volcanoes. In Historical Geology, the emphasis is on the evolution of life-forms and the forces that created life. Separate chapters examine different geologic time periods. The human era and modern life are addressed in the last chapter. Both of these volumes offer a great deal of information, but the texts are often dense and dry, and the black-and-white photographs are unattractive. A number of labeled diagrams, charts, tables, and simple maps appear in both titles. Excellent glossaries and separate bibliographies (of primarily magazine articles) for each chapter show these to be serious works, but some of the sources cited may be difficult for students to access. No Web sites are listed. The value of these solid resources lies in the geologic approach to the subjects.-Eva Elisabeth VonAncken, Trinity-Pawling School, Pawling, NY Copyright 2003 Cahners Business Information.
Covering the metamorphic span of Earth's history as told through its fossils, rocks, and species, this book chronicles the emergence of each successive group of plants and animals. Chapters are organized according to the different geologic time periods, from the origins of the planet to the current Holocene interglacial period. An introduction details basic geological concepts, and black and white illustrations are featured throughout. Erickson is a geologist. Annotation c. Book News, Inc., Portland, OR (booknews.com)