Contraction and expansion tectonics

Earth Outlines

A long-running debate concerns the change in size of the solid Earth - has it stayed the same, shrunk, or swollen A steady-state view, in which the Earth has had constant dimensions, is associated with the ruling plate-tectonic theory and with fixed continents and oceans model (e.g. Meyerhoff and Meyerhoff 1972). Proposals of an expanding or contracting globe are controversial but not without foundation. Earth contraction, once regarded as a good explanation of tectonic episodes, is no longer...