CONTENTS. XI CHAPTER XVI. MAY NOT ALL THE PHENOMENA OF THE PRIMARY ROCKS, BOTH STRATIFIED AND UNSTRATIFIED, BE SATISFACTORILY EXPLAINED ON THE SUPPOSITION THAT THESE ROCKS ARE OF CONTEMPORANEOUS ORIGIN? Recapitulation of the principal facts — and of the conclusions deduced therefrom.—The primary slates not sedimentary deposits — arc in their original positions — their contortions, fragment-like structure, and veins, no indications of violence—not derived from the metamorphoses of fossiliferous strata.—The prevailing theory not founded on a correct deduction from facts. — Another explanation of the phenomena of the primary rocks offered. — Its consistency with the general opinions concerning the nature of the secondary and tertiary formations.— Conclusion ----- Page 370