Continents and Supercontinents

Continents and Supercontinents surveys the origin of continents and the accretion and breakup of supercontinents through earth history. It also shows how these processes affected the composition of seawater, climate, and the evolution of life.

Surveys the origin of continents, and the accretion and breakup of supercontinents through earth history. This book also shows how these processes affected the composition of seawater, climate, and the evolution of life.

Klappentext
To this day, there is a great amount of controversy about where, when and how the so-called supercontinents--Pangea, Godwana, Rodinia, and Columbia--were made and broken. Continents and Supercontinents frames that controversy by giving all the necessary background on how continental crust is
formed, modified, and destroyed, and what forces move plates. It also discusses how these processes affect the composition of seawater, climate, and the evolution of life.
Rogers and Santosh begin with a survey of plate tectonics, and go on to describe the composition, production, and destruction of continental and oceanic crust, and show that cratons or assemblies of cratons became the first true continents, approximately one billion years after the earliest
continental crust evolved. The middle part of the book concentrates on supercontinents, beginning with a discussion of types of orogenic belts, distinguishing those that formed by closure of an ocean basin within the belt and those that formed by intracontinental deformation caused by stresses
generated elsewhere. This information permits discrimination between models of supercontinent formation by accretion of numerous small terranes and by reorganization of large old continental blocks.
This background leads to a description of the assembly and fragmentation of supercontinents throughout earth history. The record is most difficult to interpret for the oldest supercontinent, Columbia, and also controversial for Rodinia, the next youngest supercontinent. The configurations and
pattern of breakup of Gondwana and Pangea are well known, but some aspects of their assembly are unclear. The book also briefly describes thehistories of continents after the breakup of Pangea, and discusses how changes in the composition of seawater, climate, and life may have been affected by
the sizes and locations of continents and supercontinents.

Zusammenfassung
Continents and Supercontinents surveys the origin of continents and the accretion and breakup of supercontinents through earth history. It also shows how these processes affected the composition of seawater, climate, and the evolution of life.

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