The book is divided into three main sections: Elastic Continua, Waves and Rays and Variational Formulation of Rays. There is also a fourth part, which consists of appendices.
In Elastic Continua, we use continuum mechanics to describe the material through which seismic waves propagate, and to formulate a system of equations to study the behaviour of such a material. In Waves and Rays, we use these equations to identify the types of body waves propagating in elastic continua as well as to express their velocities and displacements in terms of the properties of these continua. To solve the equations of motion in anisotropic inhomogeneous continua, we invoke the concept of a ray. In Variational Formulation of Rays, we show that, in elastic continua, a ray is tantamount to a trajectory along which a seismic signal propagates in accordance with the variational principle of stationary traveltime. Consequently, many seismic problems in elastic continua can be conveniently formulated and solved using the calculus of variations. In the Appendices, we describe two mathematical concepts that are used in the book; namely, homogeneity of a function and Legendre's transformation. This section also contains a list of symbols.
At last, many unanswered questions about the earth’s creation can be resolved with confidence. For example, how long did it take? Where did it take place? What about evolution, fossils, dinosaurs and cave men? Well-supported answers are here.
For those who have been challenged to explain the earth’s creation from an LDS viewpoint, this book will be helpful and enlightening. And for those who enjoy contemplating both the discoveries of science and the revelations of God, this book will be extremely stimulating and thought-provoking.
Readers have commented:
Dan from Canada: “This book has enlightened my mind and given me the wonderful opportunity to see the intermeshing between science and our religion.”
Paul from Texas: “Well-supported viewpoint and thought-provoking reading.... I appreciate Brother Skousen’s heavy usage of scriptural references and quotes from trustworthy Church leaders.”
Kristy from Utah: “Answered a lot of questions I had from my geology classes and gave me a deeper appreciation for this awesome planet we live on and the creator of it.”
Kelly from California: “This book explained so much about issues that had previously confused or bothered me.”
Jerome from Georgia: “Life altering, made me a better person.... If you really want to understand the ‘Big Picture’ then this book is a must read.”
Dave from Washington: “One unexpected blessing received from reading this book was an enhanced Temple worship experience.”
Ed from Iowa: “If you are LDS, this will open your eyes to things that are incredible and you will not look at the world we live in in the same way again.”
Devon: “Scholarly material well presented for the layman.”
This eBook includes the original index, illustrations, footnotes, table of contents and page numbering from the printed format.